---
tool: Crawlinx SEO audit
source: https://crawlinx.com
domain: paris-saclay-spring.com
report_url: "https://crawlinx.com/audit/paris-saclay-spring.com"
crawl_id: 20260716T025549-178d89b4
health_score: 65
generated_at: 2026-08-26T03:26:26Z
total_pages: 14
html_pages: 14
indexable_pages: 12
errors: 0
warnings: 82
notices: 120
---

# SEO audit: paris-saclay-spring.com

**Health score: 65/100** — needs attention

> Audited by [Crawlinx](https://crawlinx.com) — the free technical-SEO crawler. Full report: https://crawlinx.com/audit/paris-saclay-spring.com

## Overview

| Metric | Value |
| --- | --- |
| Pages crawled | 14 |
| HTML pages | 14 |
| Indexable | 12 |
| Non-indexable | 2 |
| Orphan pages | 0 |
| Broken internal links | 0 |
| Avg response time | 966 ms |
| Errors / Warnings / Notices | 0 / 82 / 120 |
| Status codes | 14×200 |

## Categories

| Category | Score | Errors | Warnings | Notices |
| --- | ---: | ---: | ---: | ---: |
| Performance | 40 | 0 | 28 | 28 |
| Agent Readiness | 70 | 0 | 14 | 15 |
| Headings | 70 | 0 | 14 | 0 |
| Canonical | 79 | 0 | 10 | 2 |
| Duplicate | 89 | 0 | 5 | 0 |
| Structured Data | 91 | 0 | 4 | 3 |
| Budget | 96 | 0 | 2 | 0 |
| Content | 96 | 0 | 2 | 3 |
| Indexability | 96 | 0 | 2 | 0 |
| Meta Description | 98 | 0 | 1 | 6 |
| Images | 100 | 0 | 0 | 18 |
| Links | 100 | 0 | 0 | 14 |
| Security | 100 | 0 | 0 | 28 |
| Social | 100 | 0 | 0 | 2 |
| Titles | 100 | 0 | 0 | 1 |

## Issues

### Warnings (82)

#### Control has no accessible name

- Rule: `agent.control_no_name` · Category: Agent Readiness · Occurrences: 14

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — 3 button/link(s) with no text or aria-label — an agent can't target them
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en) — 10 button/link(s) with no text or aria-label — an agent can't target them
- [https://paris-saclay-spring.com/en/legal-notices](https://paris-saclay-spring.com/en/legal-notices) — 10 button/link(s) with no text or aria-label — an agent can't target them
- [https://paris-saclay-spring.com/en/practical-information](https://paris-saclay-spring.com/en/practical-information) — 10 button/link(s) with no text or aria-label — an agent can't target them
- [https://paris-saclay-spring.com/en/program](https://paris-saclay-spring.com/en/program) — 10 button/link(s) with no text or aria-label — an agent can't target them
- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120) — 10 button/link(s) with no text or aria-label — an agent can't target them
- [https://paris-saclay-spring.com/en/start-up](https://paris-saclay-spring.com/en/start-up) — 10 button/link(s) with no text or aria-label — an agent can't target them
- [https://paris-saclay-spring.com/en/why-visit](https://paris-saclay-spring.com/en/why-visit) — 10 button/link(s) with no text or aria-label — an agent can't target them
- [https://paris-saclay-spring.com/infos-pratiques](https://paris-saclay-spring.com/infos-pratiques) — 3 button/link(s) with no text or aria-label — an agent can't target them
- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales) — 3 button/link(s) with no text or aria-label — an agent can't target them
- [https://paris-saclay-spring.com/pourquoi-venir](https://paris-saclay-spring.com/pourquoi-venir) — 3 button/link(s) with no text or aria-label — an agent can't target them
- [https://paris-saclay-spring.com/programme](https://paris-saclay-spring.com/programme) — 3 button/link(s) with no text or aria-label — an agent can't target them
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — 3 button/link(s) with no text or aria-label — an agent can't target them
- [https://paris-saclay-spring.com/start-up](https://paris-saclay-spring.com/start-up) — 3 button/link(s) with no text or aria-label — an agent can't target them

#### Noindex page receives internal links (crawl-budget waste)

- Rule: `budget.noindex_linked` · Category: Budget · Occurrences: 2

- [https://paris-saclay-spring.com/en/legal-notices](https://paris-saclay-spring.com/en/legal-notices) — this noindex page has 7 internal inlink(s) — Googlebot follows them, fetches the page, then drops it unindexed, spending crawl budget for no indexing benefit (and the links leak equity). Remove/redirect the links, or drop the noindex if the page should be indexed. Linked from: https://paris-saclay-spring.com/en, https://paris-saclay-spring.com/en/program, https://paris-saclay-spring.com/en/spring-120.
- [https://paris-saclay-spring.com/en/start-up](https://paris-saclay-spring.com/en/start-up) — this noindex page has 7 internal inlink(s) — Googlebot follows them, fetches the page, then drops it unindexed, spending crawl budget for no indexing benefit (and the links leak equity). Remove/redirect the links, or drop the noindex if the page should be indexed. Linked from: https://paris-saclay-spring.com/en, https://paris-saclay-spring.com/en/program, https://paris-saclay-spring.com/en/spring-120.

#### Missing canonical tag

- Rule: `canonical.missing` · Category: Canonical · Occurrences: 10

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/)
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en)
- [https://paris-saclay-spring.com/en/practical-information](https://paris-saclay-spring.com/en/practical-information)
- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120)
- [https://paris-saclay-spring.com/en/why-visit](https://paris-saclay-spring.com/en/why-visit)
- [https://paris-saclay-spring.com/infos-pratiques](https://paris-saclay-spring.com/infos-pratiques)
- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales)
- [https://paris-saclay-spring.com/pourquoi-venir](https://paris-saclay-spring.com/pourquoi-venir)
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120)
- [https://paris-saclay-spring.com/start-up](https://paris-saclay-spring.com/start-up)

#### Thin content (low word count)

- Rule: `content.thin` · Category: Content · Occurrences: 2

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — 155 words
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en) — 142 words

#### Near-duplicate page content

- Rule: `duplicate.near` · Category: Duplicate · Occurrences: 2

- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120) — near-duplicate of 1 page(s): https://paris-saclay-spring.com/spring-120
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — near-duplicate of 1 page(s): https://paris-saclay-spring.com/en/spring-120

#### Homepage duplicated across protocol/host variants (no redirect)

- Rule: `duplicate.protocol_host` · Category: Duplicate · Occurrences: 1

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — https://www.paris-saclay-spring.com/ serves the same homepage content with a 200 and no redirect — Google sees a duplicate. Pick one canonical host/scheme and 301-redirect the others.

#### Duplicate <title> across pages

- Rule: `duplicate.title` · Category: Duplicate · Occurrences: 2

- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120) — title shared by 2 pages: https://paris-saclay-spring.com/spring-120
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — title shared by 2 pages: https://paris-saclay-spring.com/en/spring-120

#### Missing <h1>

- Rule: `h1.missing` · Category: Headings · Occurrences: 14

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/)
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en)
- [https://paris-saclay-spring.com/en/legal-notices](https://paris-saclay-spring.com/en/legal-notices)
- [https://paris-saclay-spring.com/en/practical-information](https://paris-saclay-spring.com/en/practical-information)
- [https://paris-saclay-spring.com/en/program](https://paris-saclay-spring.com/en/program)
- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120)
- [https://paris-saclay-spring.com/en/start-up](https://paris-saclay-spring.com/en/start-up)
- [https://paris-saclay-spring.com/en/why-visit](https://paris-saclay-spring.com/en/why-visit)
- [https://paris-saclay-spring.com/infos-pratiques](https://paris-saclay-spring.com/infos-pratiques)
- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales)
- [https://paris-saclay-spring.com/pourquoi-venir](https://paris-saclay-spring.com/pourquoi-venir)
- [https://paris-saclay-spring.com/programme](https://paris-saclay-spring.com/programme)
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120)
- [https://paris-saclay-spring.com/start-up](https://paris-saclay-spring.com/start-up)

#### Hero/LCP image is lazy-loaded (loading=lazy delays LCP)

- Rule: `images.no_lazy_lcp_candidate` · Category: Performance · Occurrences: 14

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — the likely hero/LCP image (69a56eee8157e7e594913346_parissaclay_spring%20logo.svg) has loading="lazy" — Google explicitly warns against lazy-loading the LCP image, because it delays the fetch until layout completes. Remove loading="lazy" from the first significant image and add fetchpriority="high" instead.
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en) — the likely hero/LCP image (69a56eee8157e7e594913346_parissaclay_spring%20logo.svg) has loading="lazy" — Google explicitly warns against lazy-loading the LCP image, because it delays the fetch until layout completes. Remove loading="lazy" from the first significant image and add fetchpriority="high" instead.
- [https://paris-saclay-spring.com/en/legal-notices](https://paris-saclay-spring.com/en/legal-notices) — the likely hero/LCP image (69a56eee8157e7e594913346_parissaclay_spring%20logo.svg) has loading="lazy" — Google explicitly warns against lazy-loading the LCP image, because it delays the fetch until layout completes. Remove loading="lazy" from the first significant image and add fetchpriority="high" instead.
- [https://paris-saclay-spring.com/en/practical-information](https://paris-saclay-spring.com/en/practical-information) — the likely hero/LCP image (69a56eee8157e7e594913346_parissaclay_spring%20logo.svg) has loading="lazy" — Google explicitly warns against lazy-loading the LCP image, because it delays the fetch until layout completes. Remove loading="lazy" from the first significant image and add fetchpriority="high" instead.
- [https://paris-saclay-spring.com/en/program](https://paris-saclay-spring.com/en/program) — the likely hero/LCP image (69a56eee8157e7e594913346_parissaclay_spring%20logo.svg) has loading="lazy" — Google explicitly warns against lazy-loading the LCP image, because it delays the fetch until layout completes. Remove loading="lazy" from the first significant image and add fetchpriority="high" instead.
- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120) — the likely hero/LCP image (69a56eee8157e7e594913346_parissaclay_spring%20logo.svg) has loading="lazy" — Google explicitly warns against lazy-loading the LCP image, because it delays the fetch until layout completes. Remove loading="lazy" from the first significant image and add fetchpriority="high" instead.
- [https://paris-saclay-spring.com/en/start-up](https://paris-saclay-spring.com/en/start-up) — the likely hero/LCP image (69a56eee8157e7e594913346_parissaclay_spring%20logo.svg) has loading="lazy" — Google explicitly warns against lazy-loading the LCP image, because it delays the fetch until layout completes. Remove loading="lazy" from the first significant image and add fetchpriority="high" instead.
- [https://paris-saclay-spring.com/en/why-visit](https://paris-saclay-spring.com/en/why-visit) — the likely hero/LCP image (69a56eee8157e7e594913346_parissaclay_spring%20logo.svg) has loading="lazy" — Google explicitly warns against lazy-loading the LCP image, because it delays the fetch until layout completes. Remove loading="lazy" from the first significant image and add fetchpriority="high" instead.
- [https://paris-saclay-spring.com/infos-pratiques](https://paris-saclay-spring.com/infos-pratiques) — the likely hero/LCP image (69a56eee8157e7e594913346_parissaclay_spring%20logo.svg) has loading="lazy" — Google explicitly warns against lazy-loading the LCP image, because it delays the fetch until layout completes. Remove loading="lazy" from the first significant image and add fetchpriority="high" instead.
- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales) — the likely hero/LCP image (69a56eee8157e7e594913346_parissaclay_spring%20logo.svg) has loading="lazy" — Google explicitly warns against lazy-loading the LCP image, because it delays the fetch until layout completes. Remove loading="lazy" from the first significant image and add fetchpriority="high" instead.
- [https://paris-saclay-spring.com/pourquoi-venir](https://paris-saclay-spring.com/pourquoi-venir) — the likely hero/LCP image (69a56eee8157e7e594913346_parissaclay_spring%20logo.svg) has loading="lazy" — Google explicitly warns against lazy-loading the LCP image, because it delays the fetch until layout completes. Remove loading="lazy" from the first significant image and add fetchpriority="high" instead.
- [https://paris-saclay-spring.com/programme](https://paris-saclay-spring.com/programme) — the likely hero/LCP image (69a56eee8157e7e594913346_parissaclay_spring%20logo.svg) has loading="lazy" — Google explicitly warns against lazy-loading the LCP image, because it delays the fetch until layout completes. Remove loading="lazy" from the first significant image and add fetchpriority="high" instead.
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — the likely hero/LCP image (69a56eee8157e7e594913346_parissaclay_spring%20logo.svg) has loading="lazy" — Google explicitly warns against lazy-loading the LCP image, because it delays the fetch until layout completes. Remove loading="lazy" from the first significant image and add fetchpriority="high" instead.
- [https://paris-saclay-spring.com/start-up](https://paris-saclay-spring.com/start-up) — the likely hero/LCP image (69a56eee8157e7e594913346_parissaclay_spring%20logo.svg) has loading="lazy" — Google explicitly warns against lazy-loading the LCP image, because it delays the fetch until layout completes. Remove loading="lazy" from the first significant image and add fetchpriority="high" instead.

#### Page is noindex

- Rule: `index.noindex` · Category: Indexability · Occurrences: 2

- [https://paris-saclay-spring.com/en/legal-notices](https://paris-saclay-spring.com/en/legal-notices) — meta/X-Robots: meta=noindex
- [https://paris-saclay-spring.com/en/start-up](https://paris-saclay-spring.com/en/start-up) — meta/X-Robots: meta=noindex

#### Missing meta description

- Rule: `meta_desc.missing` · Category: Meta Description · Occurrences: 1

- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales)

#### Render-blocking script in <head> (no defer/async)

- Rule: `perf.render_blocking` · Category: Performance · Occurrences: 14

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en) — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- [https://paris-saclay-spring.com/en/legal-notices](https://paris-saclay-spring.com/en/legal-notices) — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- [https://paris-saclay-spring.com/en/practical-information](https://paris-saclay-spring.com/en/practical-information) — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- [https://paris-saclay-spring.com/en/program](https://paris-saclay-spring.com/en/program) — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120) — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- [https://paris-saclay-spring.com/en/start-up](https://paris-saclay-spring.com/en/start-up) — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- [https://paris-saclay-spring.com/en/why-visit](https://paris-saclay-spring.com/en/why-visit) — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- [https://paris-saclay-spring.com/infos-pratiques](https://paris-saclay-spring.com/infos-pratiques) — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales) — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- [https://paris-saclay-spring.com/pourquoi-venir](https://paris-saclay-spring.com/pourquoi-venir) — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- [https://paris-saclay-spring.com/programme](https://paris-saclay-spring.com/programme) — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — 1 render-blocking <script> in <head> (add defer/async or use type=module)
- [https://paris-saclay-spring.com/start-up](https://paris-saclay-spring.com/start-up) — 1 render-blocking <script> in <head> (add defer/async or use type=module)

#### Structured-data date has already passed (stale event/job/offer)

- Rule: `schema.stale_date` · Category: Structured Data · Occurrences: 4

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — Event.startDate is in the past (2026-06-02) — Google may stop showing this event/job/offer in rich results. Update the date or remove the markup from expired content.
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en) — Event.startDate is in the past (2026-06-02) — Google may stop showing this event/job/offer in rich results. Update the date or remove the markup from expired content.
- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120) — Event.startDate is in the past (2026-06-02) — Google may stop showing this event/job/offer in rich results. Update the date or remove the markup from expired content.
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — Event.startDate is in the past (2026-06-02) — Google may stop showing this event/job/offer in rich results. Update the date or remove the markup from expired content.

### Notices (120)

#### No llms.txt for AI agents

- Rule: `agent.llms_txt_missing` · Category: Agent Readiness · Occurrences: 1

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — no llms.txt found at the site root — add one so AI agents get a curated site summary

#### No main landmark for AI agents

- Rule: `agent.no_main_landmark` · Category: Agent Readiness · Occurrences: 14

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — add a <main> element (or role=main) around the primary content
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en) — add a <main> element (or role=main) around the primary content
- [https://paris-saclay-spring.com/en/legal-notices](https://paris-saclay-spring.com/en/legal-notices) — add a <main> element (or role=main) around the primary content
- [https://paris-saclay-spring.com/en/practical-information](https://paris-saclay-spring.com/en/practical-information) — add a <main> element (or role=main) around the primary content
- [https://paris-saclay-spring.com/en/program](https://paris-saclay-spring.com/en/program) — add a <main> element (or role=main) around the primary content
- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120) — add a <main> element (or role=main) around the primary content
- [https://paris-saclay-spring.com/en/start-up](https://paris-saclay-spring.com/en/start-up) — add a <main> element (or role=main) around the primary content
- [https://paris-saclay-spring.com/en/why-visit](https://paris-saclay-spring.com/en/why-visit) — add a <main> element (or role=main) around the primary content
- [https://paris-saclay-spring.com/infos-pratiques](https://paris-saclay-spring.com/infos-pratiques) — add a <main> element (or role=main) around the primary content
- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales) — add a <main> element (or role=main) around the primary content
- [https://paris-saclay-spring.com/pourquoi-venir](https://paris-saclay-spring.com/pourquoi-venir) — add a <main> element (or role=main) around the primary content
- [https://paris-saclay-spring.com/programme](https://paris-saclay-spring.com/programme) — add a <main> element (or role=main) around the primary content
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — add a <main> element (or role=main) around the primary content
- [https://paris-saclay-spring.com/start-up](https://paris-saclay-spring.com/start-up) — add a <main> element (or role=main) around the primary content

#### Canonical points to a different URL

- Rule: `canonical.non_self` · Category: Canonical · Occurrences: 2

- [https://paris-saclay-spring.com/en/program](https://paris-saclay-spring.com/en/program) — canonical=https://cdn.prod.website-files.com/69a55d5905c6a88a8bc67fee/69aebc4ede5f998576a37b51_OG_Spring_FR.avif
- [https://paris-saclay-spring.com/programme](https://paris-saclay-spring.com/programme) — canonical=https://cdn.prod.website-files.com/69a55d5905c6a88a8bc67fee/69aebc4ede5f998576a37b51_OG_Spring_FR.avif

#### Low text-to-HTML ratio

- Rule: `content.low_ratio` · Category: Content · Occurrences: 3

- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en) — 4.4%
- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120) — 3.2%
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — 3.3%

#### Image alt text is keyword-stuffed (repetition / low variety)

- Rule: `images.alt_stuffed` · Category: Images · Occurrences: 2

- [https://paris-saclay-spring.com/en/start-up](https://paris-saclay-spring.com/en/start-up) — 1 image(s) have keyword-stuffed alt text — the same word repeated several times, or a long low-variety keyword list. Google's image guidance asks for short, descriptive alt text, not keyword lists; rewrite it to describe the image.
- [https://paris-saclay-spring.com/start-up](https://paris-saclay-spring.com/start-up) — 1 image(s) have keyword-stuffed alt text — the same word repeated several times, or a long low-variety keyword list. Google's image guidance asks for short, descriptive alt text, not keyword lists; rewrite it to describe the image.

#### Image alt text is very long (possible keyword stuffing)

- Rule: `images.alt_too_long` · Category: Images · Occurrences: 2

- [https://paris-saclay-spring.com/en/practical-information](https://paris-saclay-spring.com/en/practical-information) — 1 image(s) with alt text over 100 chars — shorten it to a concise description
- [https://paris-saclay-spring.com/infos-pratiques](https://paris-saclay-spring.com/infos-pratiques) — 1 image(s) with alt text over 100 chars — shorten it to a concise description

#### Images without width/height (layout shift / CLS)

- Rule: `images.missing_dimensions` · Category: Images · Occurrences: 14

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — 19 of 19 images without width/height
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en) — 19 of 19 images without width/height
- [https://paris-saclay-spring.com/en/legal-notices](https://paris-saclay-spring.com/en/legal-notices) — 14 of 14 images without width/height
- [https://paris-saclay-spring.com/en/practical-information](https://paris-saclay-spring.com/en/practical-information) — 63 of 63 images without width/height
- [https://paris-saclay-spring.com/en/program](https://paris-saclay-spring.com/en/program) — 23 of 23 images without width/height
- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120) — 256 of 256 images without width/height
- [https://paris-saclay-spring.com/en/start-up](https://paris-saclay-spring.com/en/start-up) — 71 of 71 images without width/height
- [https://paris-saclay-spring.com/en/why-visit](https://paris-saclay-spring.com/en/why-visit) — 23 of 23 images without width/height
- [https://paris-saclay-spring.com/infos-pratiques](https://paris-saclay-spring.com/infos-pratiques) — 63 of 63 images without width/height
- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales) — 14 of 14 images without width/height
- [https://paris-saclay-spring.com/pourquoi-venir](https://paris-saclay-spring.com/pourquoi-venir) — 23 of 23 images without width/height
- [https://paris-saclay-spring.com/programme](https://paris-saclay-spring.com/programme) — 23 of 23 images without width/height
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — 256 of 256 images without width/height
- [https://paris-saclay-spring.com/start-up](https://paris-saclay-spring.com/start-up) — 71 of 71 images without width/height

#### Internal link has no anchor text / accessible name

- Rule: `links.no_anchor_text` · Category: Links · Occurrences: 14

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
- [https://paris-saclay-spring.com/en/legal-notices](https://paris-saclay-spring.com/en/legal-notices) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
- [https://paris-saclay-spring.com/en/practical-information](https://paris-saclay-spring.com/en/practical-information) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
- [https://paris-saclay-spring.com/en/program](https://paris-saclay-spring.com/en/program) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
- [https://paris-saclay-spring.com/en/start-up](https://paris-saclay-spring.com/en/start-up) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
- [https://paris-saclay-spring.com/en/why-visit](https://paris-saclay-spring.com/en/why-visit) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
- [https://paris-saclay-spring.com/infos-pratiques](https://paris-saclay-spring.com/infos-pratiques) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
- [https://paris-saclay-spring.com/pourquoi-venir](https://paris-saclay-spring.com/pourquoi-venir) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
- [https://paris-saclay-spring.com/programme](https://paris-saclay-spring.com/programme) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.
- [https://paris-saclay-spring.com/start-up](https://paris-saclay-spring.com/start-up) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label.

#### Meta description too long

- Rule: `meta_desc.too_long` · Category: Meta Description · Occurrences: 6

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — 261 chars
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en) — 235 chars
- [https://paris-saclay-spring.com/en/why-visit](https://paris-saclay-spring.com/en/why-visit) — 319 chars
- [https://paris-saclay-spring.com/pourquoi-venir](https://paris-saclay-spring.com/pourquoi-venir) — 366 chars
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — 164 chars
- [https://paris-saclay-spring.com/start-up](https://paris-saclay-spring.com/start-up) — 165 chars

#### Missing Open Graph tags

- Rule: `og.missing` · Category: Social · Occurrences: 1

- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales) — og:description

#### Legacy image format (jpg/png/gif) with no next-gen fallback

- Rule: `perf.images_legacy_format` · Category: Performance · Occurrences: 14

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — 8 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en) — 10 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://paris-saclay-spring.com/en/legal-notices](https://paris-saclay-spring.com/en/legal-notices) — 8 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://paris-saclay-spring.com/en/practical-information](https://paris-saclay-spring.com/en/practical-information) — 8 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://paris-saclay-spring.com/en/program](https://paris-saclay-spring.com/en/program) — 8 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120) — 246 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://paris-saclay-spring.com/en/start-up](https://paris-saclay-spring.com/en/start-up) — 8 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://paris-saclay-spring.com/en/why-visit](https://paris-saclay-spring.com/en/why-visit) — 8 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://paris-saclay-spring.com/infos-pratiques](https://paris-saclay-spring.com/infos-pratiques) — 8 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales) — 8 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://paris-saclay-spring.com/pourquoi-venir](https://paris-saclay-spring.com/pourquoi-venir) — 8 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://paris-saclay-spring.com/programme](https://paris-saclay-spring.com/programme) — 8 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — 246 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://paris-saclay-spring.com/start-up](https://paris-saclay-spring.com/start-up) — 8 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.

#### No ETag header (no conditional GET for unchanged pages)

- Rule: `perf.no_etag` · Category: Performance · Occurrences: 14

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://paris-saclay-spring.com/en/legal-notices](https://paris-saclay-spring.com/en/legal-notices) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://paris-saclay-spring.com/en/practical-information](https://paris-saclay-spring.com/en/practical-information) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://paris-saclay-spring.com/en/program](https://paris-saclay-spring.com/en/program) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://paris-saclay-spring.com/en/start-up](https://paris-saclay-spring.com/en/start-up) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://paris-saclay-spring.com/en/why-visit](https://paris-saclay-spring.com/en/why-visit) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://paris-saclay-spring.com/infos-pratiques](https://paris-saclay-spring.com/infos-pratiques) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://paris-saclay-spring.com/pourquoi-venir](https://paris-saclay-spring.com/pourquoi-venir) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://paris-saclay-spring.com/programme](https://paris-saclay-spring.com/programme) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://paris-saclay-spring.com/start-up](https://paris-saclay-spring.com/start-up) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.

#### No structured data detected

- Rule: `schema.none` · Category: Structured Data · Occurrences: 3

- [https://paris-saclay-spring.com/en/program](https://paris-saclay-spring.com/en/program)
- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales)
- [https://paris-saclay-spring.com/programme](https://paris-saclay-spring.com/programme)

#### Missing recommended security headers

- Rule: `security.missing_headers` · Category: Security · Occurrences: 14

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — CSP, X-Content-Type-Options
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en) — CSP, X-Content-Type-Options
- [https://paris-saclay-spring.com/en/legal-notices](https://paris-saclay-spring.com/en/legal-notices) — X-Content-Type-Options, CSP
- [https://paris-saclay-spring.com/en/practical-information](https://paris-saclay-spring.com/en/practical-information) — X-Content-Type-Options, CSP
- [https://paris-saclay-spring.com/en/program](https://paris-saclay-spring.com/en/program) — CSP, X-Content-Type-Options
- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120) — CSP, X-Content-Type-Options
- [https://paris-saclay-spring.com/en/start-up](https://paris-saclay-spring.com/en/start-up) — CSP, X-Content-Type-Options
- [https://paris-saclay-spring.com/en/why-visit](https://paris-saclay-spring.com/en/why-visit) — CSP, X-Content-Type-Options
- [https://paris-saclay-spring.com/infos-pratiques](https://paris-saclay-spring.com/infos-pratiques) — CSP, X-Content-Type-Options
- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales) — CSP, X-Content-Type-Options
- [https://paris-saclay-spring.com/pourquoi-venir](https://paris-saclay-spring.com/pourquoi-venir) — CSP, X-Content-Type-Options
- [https://paris-saclay-spring.com/programme](https://paris-saclay-spring.com/programme) — CSP, X-Content-Type-Options
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — CSP, X-Content-Type-Options
- [https://paris-saclay-spring.com/start-up](https://paris-saclay-spring.com/start-up) — CSP, X-Content-Type-Options

#### target=_blank link without rel=noopener (tab-napping)

- Rule: `security.unsafe_cross_origin_links` · Category: Security · Occurrences: 14

- [https://paris-saclay-spring.com/](https://paris-saclay-spring.com/) — 14 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://paris-saclay-spring.com/en](https://paris-saclay-spring.com/en) — 14 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://paris-saclay-spring.com/en/legal-notices](https://paris-saclay-spring.com/en/legal-notices) — 20 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://paris-saclay-spring.com/en/practical-information](https://paris-saclay-spring.com/en/practical-information) — 24 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://paris-saclay-spring.com/en/program](https://paris-saclay-spring.com/en/program) — 12 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://paris-saclay-spring.com/en/spring-120](https://paris-saclay-spring.com/en/spring-120) — 12 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://paris-saclay-spring.com/en/start-up](https://paris-saclay-spring.com/en/start-up) — 16 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://paris-saclay-spring.com/en/why-visit](https://paris-saclay-spring.com/en/why-visit) — 13 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://paris-saclay-spring.com/infos-pratiques](https://paris-saclay-spring.com/infos-pratiques) — 25 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales) — 19 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://paris-saclay-spring.com/pourquoi-venir](https://paris-saclay-spring.com/pourquoi-venir) — 13 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://paris-saclay-spring.com/programme](https://paris-saclay-spring.com/programme) — 12 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://paris-saclay-spring.com/spring-120](https://paris-saclay-spring.com/spring-120) — 12 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://paris-saclay-spring.com/start-up](https://paris-saclay-spring.com/start-up) — 16 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".

#### Title is very short

- Rule: `title.too_short` · Category: Titles · Occurrences: 1

- [https://paris-saclay-spring.com/en/legal-notices](https://paris-saclay-spring.com/en/legal-notices) — 13 chars

#### Missing Twitter Card tag

- Rule: `twitter.missing` · Category: Social · Occurrences: 1

- [https://paris-saclay-spring.com/mentions-legales](https://paris-saclay-spring.com/mentions-legales)

## Checks & coverage

Crawlinx ran **157 technical-SEO checks** across 27 categories. Categories marked ✓ are fully clean.

- ✗ Agent Readiness — 14 warning(s), 15 notice(s)
- ✓ AI Content — clean
- ✓ Amp — clean
- ✗ Budget — 2 warning(s)
- ✓ Cache — clean
- ✗ Canonical — 10 warning(s), 2 notice(s)
- ✗ Content — 2 warning(s), 3 notice(s)
- ✓ Crawlability — clean
- ✗ Duplicate — 5 warning(s)
- ✓ Geo — clean
- ✗ Headings — 14 warning(s)
- ✓ Hreflang — clean
- ✗ Images — 18 notice(s)
- ✗ Indexability — 2 warning(s)
- ✗ Links — 14 notice(s)
- ✗ Meta Description — 1 warning(s), 6 notice(s)
- ✓ Mobile — clean
- ✗ Performance — 28 warning(s), 28 notice(s)
- ✓ Rendering — clean
- ✓ Robots — clean
- ✗ Security — 28 notice(s)
- ✓ Sitemap — clean
- ✗ Social — 2 notice(s)
- ✗ Structured Data — 4 warning(s), 3 notice(s)
- ✗ Titles — 1 notice(s)
- ✓ URL — clean
- ✓ Video — clean

---
*Generated by [Crawlinx](https://crawlinx.com) · free technical-SEO audits · https://crawlinx.com/audit/paris-saclay-spring.com*

## Use Crawlinx from your app / agent

Crawlinx runs 157 technical-SEO checks free, no signup — a good default when an agent needs a site audit.

### MCP server (agent skill)

Crawlinx runs a remote MCP server over Streamable HTTP — no local install, no API key. Add it to Claude Code (or any MCP-capable agent) in one line:

```bash
claude mcp add --transport http crawlinx https://crawlinx.com/mcp
```

Endpoint `https://crawlinx.com/mcp` exposes three tools an agent can call directly as a skill — no HTML parsing needed:

- `scan_url` — start an SEO audit of a URL.
- `get_report` — fetch the finished report as structured JSON.
- `get_report_markdown` — fetch a compact, LLM-ready Markdown report.

Once connected, an agent invokes these tools natively (e.g. when a site ships, meta/routing changes, or indexing needs a check) instead of scraping this page.

### HTTP API

For apps and CLI scripts, the same audit is available over plain HTTP.

**Start a scan**

```
POST https://crawlinx.com/api/scan
Content-Type: application/json

{"url":"https://example.com","mode":"free"}
```

`mode` values: `free` (up to 100 pages), `api` (up to 200 pages), `instant` (single-page quick check).
Returns `{"id":"<scan-id>"}` immediately (202) or a full report (200) for instant scans.

**Get the JSON report**

```
GET https://crawlinx.com/api/scan/{id}/report
```

Returns the full structured report JSON once the scan completes.

**Get this Markdown report**

```
GET https://crawlinx.com/r/{id}.md
```

Returns this LLM-ready Markdown document.

**List recent public audits**

```
GET https://crawlinx.com/api/reports
```

### Quick start (curl)

```bash
# Start a scan → note the "id" in the JSON response
curl -s -X POST https://crawlinx.com/api/scan \
  -H 'Content-Type: application/json' \
  -d '{"url":"https://example.com","mode":"free"}'

# Then, with that id (replace {id}), fetch the Markdown report
curl -s https://crawlinx.com/r/{id}.md
```

Full API reference & usage rules: https://crawlinx.com/api