Catalog / mkohler.dev
55

SEO audit for mkohler.dev

Michael Kohler

saasNext.js

Health 55/100 (fair) · 50 pages crawled · generated 2026-08-26

Download Markdown report (feed to ChatGPT / Claude / Cursor)

Michael is a Lead Software Engineer and Open Source enthusiast living in Berlin. He has been contributing to Mozilla since 2008.

Screenshot of mkohler.dev
50
pages crawled
46
indexable pages
18
errors
143
warnings
523
notices
0
orphan pages
15
broken links
Category breakdown
CategoryScoreErrorsWarningsNotices
Links 70 15 0 44
Crawlability 94 3 0 0
Duplicate 71 0 48 44
Canonical 72 0 46 0
Agent Readiness 74 0 44 56
Images 99 0 2 48
Meta Description 99 0 2 0
Content 99 0 1 16
Headings 100 0 0 38
Performance 100 0 0 77
Robots 100 0 0 1
Security 100 0 0 51
Social 100 0 0 48
Structured Data 100 0 0 46
Titles 100 0 0 52
URL 100 0 0 2
Findings

Errors (2 rules)

error Broken internal link (target 4xx/5xx)

Rule links.broken_internal · Links · 15 occurrence(s)

Warnings (7 rules)

warning Control has no accessible name

Rule agent.control_no_name · Agent Readiness · 44 occurrence(s)

warning Missing canonical tag

Rule canonical.missing · Canonical · 46 occurrence(s)

warning Thin content (low word count)

Rule content.thin · Content · 1 occurrence(s)

warning Duplicate page content

Rule duplicate.content · Duplicate · 4 occurrence(s)

warning Duplicate <title> across pages

Rule duplicate.title · Duplicate · 44 occurrence(s)

warning Images missing alt text

Rule images.missing_alt · Images · 2 occurrence(s)

warning Missing meta description

Rule meta_desc.missing · Meta Description · 2 occurrence(s)

Notices (21 rules)

notice No llms.txt for AI agents

Rule agent.llms_txt_missing · Agent Readiness · 1 occurrence(s)

  • https://mkohler.dev/ — no llms.txt found at the site root — add one so AI agents get a curated site summary

notice No main landmark for AI agents

Rule agent.no_main_landmark · Agent Readiness · 46 occurrence(s)

notice Main text is hard to read (low Flesch Reading Ease)

Rule content.readability_poor · Content · 16 occurrence(s)

  • https://mkohler.dev/ — this page reads as very difficult (Flesch Reading Ease -8, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/blog/2014/02/german-speaking-mozilla-community-meetup-february-2014/ — this page reads as difficult (Flesch Reading Ease 35, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/blog/2014/04/german-speaking-community-docsprint-april-2014/ — this page reads as difficult (Flesch Reading Ease 44, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/blog/2015/02/treffen-der-deutschsprachigen-mozilla-gemeinschaft-tag-1-de-en/ — this page reads as difficult (Flesch Reading Ease 49, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/blog/2015/02/treffen-der-deutschsprachigen-mozilla-gemeinschaft-tag-2-de-en/ — this page reads as difficult (Flesch Reading Ease 49, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/blog/2015/04/german-speaking-community-status-of-goals/ — this page reads as very difficult (Flesch Reading Ease 8, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/blog/2015/12/german-speaking-community-mid-term-planning/ — this page reads as difficult (Flesch Reading Ease 44, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/blog/2016/01/mozillas-strategische-leitlinien-fuer-2016-und-danach/ — this page reads as difficult (Flesch Reading Ease 33, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/blog/2016/09/mozilla-switzerland-community-meetup-june-2016/ — this page reads as difficult (Flesch Reading Ease 35, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/blog/2017/01/mozilla-switzerland-community-meetup-2017/ — this page reads as difficult (Flesch Reading Ease 49, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/contributions — this page reads as very difficult (Flesch Reading Ease 28, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/opensource — this page reads as difficult (Flesch Reading Ease 43, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/opensource/ — this page reads as difficult (Flesch Reading Ease 43, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/presentations/mozillaCH-community-meetup-2017/ — this page reads as very difficult (Flesch Reading Ease 22, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/talks — this page reads as very difficult (Flesch Reading Ease -57, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.
  • https://mkohler.dev/talks/ — this page reads as very difficult (Flesch Reading Ease -57, below 50) — long sentences and multi-syllable words make it hard to scan. Shorten sentences and prefer plainer words to widen your audience. Density can be legitimate for expert, technical or legal content, so judge it against who the page is for.

notice Duplicate meta description across pages

Rule duplicate.meta_desc · Duplicate · 44 occurrence(s)

notice Multiple <h1> elements

Rule h1.multiple · Headings · 38 occurrence(s)

notice Image filename is generic/auto-generated (missed image-search signal)

Rule images.generic_filename · Images · 2 occurrence(s)

notice Likely hero image lacks fetchpriority=high

Rule images.hero_no_fetchpriority · Performance · 46 occurrence(s)

  • https://mkohler.dev/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2015/07/mozilla-weekend-berlin-2015-preparation-and-day-1/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2015/07/mozilla-weekend-berlin-day-2-feedback/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2015/11/mozilla-tech-weekend-in-berlin-november-28th-and-29th/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2015/12/german-speaking-community-mid-term-planning/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2015/12/mozcoffee-framework-wie-organisiere-ich-ein-meetup/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2016/01/mozillas-strategische-leitlinien-fuer-2016-und-danach/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2016/02/mozilla-switzerland-goals-h1-2016/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2016/04/mozilla-switzerland-iot-hackathon-in-lausanne/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2016/04/reps-council-working-days-berlin-2016/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2016/05/alpha-review-using-janitor-to-contribute-to-firefox/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2016/05/firefox-hackathon-zurich-april-2016/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2016/09/mozilla-switzerland-community-meetup-june-2016/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2017/01/mozilla-switzerland-community-meetup-2017/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2017/07/webvr-a-frame-hackathon-in-lausanne/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2018/04/10-years-as-a-mozilla-volunteer/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/blog/2023/04/15-years-as-a-mozilla-volunteer/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/contributions — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/opensource — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/opensource/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/presentations/cern-webfest/Webfest.html — the likely hero/LCP image (popcorn_logo.jpg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/presentations/mozillaCH-community-meetup-2017/ — the likely hero/LCP image (mozilla.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/talks — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
  • https://mkohler.dev/talks/ — the likely hero/LCP image (profile.avif) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.

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

Rule images.missing_dimensions · Images · 46 occurrence(s)

notice Internal link has no anchor text / accessible name

Rule links.no_anchor_text · Links · 44 occurrence(s)

notice Missing Open Graph tags

Rule og.missing · Social · 2 occurrence(s)

notice Large DOM (over 1500 elements) slows rendering & interaction

Rule perf.dom_size_large · Performance · 1 occurrence(s)

  • https://mkohler.dev/contributions — the page has 2597 DOM elements (recommended maximum is around 1500) — a large DOM increases style-recalculation, layout and paint cost, hurting LCP and INP. Flatten deep nesting, paginate long lists/tables, and lazy-render off-screen elements.

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

Rule perf.images_legacy_format · Performance · 30 occurrence(s)

notice robots.txt missing (root returns 404/none)

Rule robots.txt_missing · Robots · 1 occurrence(s)

  • https://mkohler.dev/ — robots.txt did not return a 200 at the site root — a healthy site should serve one (declare your sitemap and confirm the host serves root files)

notice No structured data detected

Rule schema.none · Structured Data · 46 occurrence(s)

notice Missing recommended security headers

Rule security.missing_headers · Security · 49 occurrence(s)

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

Rule security.unsafe_cross_origin_links · Security · 2 occurrence(s)

  • https://mkohler.dev/talks — 8 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
  • https://mkohler.dev/talks/ — 8 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".

notice Title tag is identical to the H1 (missed keyword variation)

Rule title.same_as_h1 · Titles · 8 occurrence(s)

notice Title is very short

Rule title.too_short · Titles · 44 occurrence(s)

notice Missing Twitter Card tag

Rule twitter.missing · Social · 46 occurrence(s)

notice Uppercase letters in URL path

Rule url.uppercase · URL · 2 occurrence(s)

Pages (showing 50 of 50)
URLStatusIndexableWordsIn-links
https://mkohler.dev/
Michael Kohler
200 yes 678 48
https://mkohler.dev/blog
Michael Kohler
200 yes 2317 47
https://mkohler.dev/opensource/
Michael Kohler
200 yes 602 47
https://mkohler.dev/talks
Michael Kohler
200 yes 889 47
https://mkohler.dev/contributions
Michael Kohler
200 yes 6213 2
https://mkohler.dev/presentations/cern-webfest/Webfest.html
CERN Webfest - 02.08.2013 - Mozilla Webmaker
200 yes 275 2
https://mkohler.dev/presentations/mozillaCH-community-meetup-2017/
Mozilla Switzerland Community Meetup 2017
200 yes 319 2
https://mkohler.dev/blog/2015/07/mozilla-weekend-berlin-2015-preparation-and-day-1/
Michael Kohler
200 yes 668 2
https://mkohler.dev/blog/2015/07/mozilla-weekend-berlin-day-2-feedback/
Michael Kohler
200 yes 1016 2
https://mkohler.dev/blog/2016/05/firefox-hackathon-zurich-april-2016/
Michael Kohler
200 yes 592 2
https://mkohler.dev/blog/2018/04/10-years-as-a-mozilla-volunteer/
Michael Kohler
200 yes 2531 2
https://mkohler.dev/blog/2013/06/firefox-os-app-days-combined-with-webmaker/
Michael Kohler
200 yes 563 1
https://mkohler.dev/blog/2013/08/barcamp-erfurt-2013/
Michael Kohler
200 yes 304 1
https://mkohler.dev/blog/2013/11/okcon-2013-in-geneva/
Michael Kohler
200 yes 349 1
https://mkohler.dev/blog/2014/02/german-speaking-mozilla-community-meetup-february-2014/
Michael Kohler
200 yes 490 1
https://mkohler.dev/blog/2014/04/barcamp-salzburg-march-2014/
Michael Kohler
200 yes 316 1
https://mkohler.dev/blog/2014/04/german-speaking-community-docsprint-april-2014/
Michael Kohler
200 yes 498 1
https://mkohler.dev/blog/2014/05/mobilecamp-dresden-may-2014/
Michael Kohler
200 yes 365 1
https://mkohler.dev/blog/2014/05/mozilla-hacking-day-april-2014/
Michael Kohler
200 yes 778 1
https://mkohler.dev/blog/2014/11/europython-2014/
Michael Kohler
200 yes 520 1
https://mkohler.dev/blog/2014/11/firefox-os-app-day-frankfurt-22-11-2014/
Michael Kohler
200 yes 739 1
https://mkohler.dev/blog/2014/11/million-mask-march-zurich-08-11-2014/
Michael Kohler
200 yes 296 1
https://mkohler.dev/blog/2014/20/mozilla-hacking-day-2-11-10-2014/
Michael Kohler
200 yes 362 1
https://mkohler.dev/blog/2015/02/firefox-os-awareness-day-2014/
Michael Kohler
200 yes 710 1
https://mkohler.dev/blog/2015/02/treffen-der-deutschsprachigen-mozilla-gemeinschaft-tag-0-de-en/
Michael Kohler
200 yes 1032 1
https://mkohler.dev/blog/2015/02/treffen-der-deutschsprachigen-mozilla-gemeinschaft-tag-1-de-en/
Michael Kohler
200 yes 1261 1
https://mkohler.dev/blog/2015/02/treffen-der-deutschsprachigen-mozilla-gemeinschaft-tag-2-de-en/
Michael Kohler
200 yes 1475 1
https://mkohler.dev/blog/2015/03/foss-asia-2015-singapore/
Michael Kohler
200 yes 1092 1
https://mkohler.dev/blog/2015/03/german-speaking-mozilla-community-meeting-feedback/
Michael Kohler
200 yes 601 1
https://mkohler.dev/blog/2015/04/german-speaking-community-status-of-goals/
Michael Kohler
200 yes 454 1
https://mkohler.dev/blog/2015/05/mobilecamp-2015-firefox-os-room/
Michael Kohler
200 yes 528 1
https://mkohler.dev/blog/2015/07/foxyeah-in-the-german-speaking-community/
Michael Kohler
200 yes 685 1
https://mkohler.dev/blog/2015/11/mozilla-tech-weekend-in-berlin-november-28th-and-29th/
Michael Kohler
200 yes 182 1
https://mkohler.dev/blog/2015/12/german-speaking-community-mid-term-planning/
Michael Kohler
200 yes 1024 1
https://mkohler.dev/blog/2015/12/mozcoffee-framework-wie-organisiere-ich-ein-meetup/
Michael Kohler
200 yes 1181 1
https://mkohler.dev/blog/2016/01/mozillas-strategische-leitlinien-fuer-2016-und-danach/
Michael Kohler
200 yes 581 1
https://mkohler.dev/blog/2016/02/mozilla-switzerland-goals-h1-2016/
Michael Kohler
200 yes 346 1
https://mkohler.dev/blog/2016/04/mozilla-switzerland-iot-hackathon-in-lausanne/
Michael Kohler
200 yes 597 1
https://mkohler.dev/blog/2016/04/reps-council-working-days-berlin-2016/
Michael Kohler
200 yes 821 1
https://mkohler.dev/blog/2016/05/alpha-review-using-janitor-to-contribute-to-firefox/
Michael Kohler
200 yes 756 1
https://mkohler.dev/blog/2016/09/mozilla-switzerland-community-meetup-june-2016/
Michael Kohler
200 yes 616 1
https://mkohler.dev/blog/2017/01/mozilla-switzerland-community-meetup-2017/
Michael Kohler
200 yes 419 1
https://mkohler.dev/blog/2017/07/webvr-a-frame-hackathon-in-lausanne/
Michael Kohler
200 yes 563 1
https://mkohler.dev/blog/2023/04/15-years-as-a-mozilla-volunteer/
Michael Kohler
200 yes 1262 1
https://mkohler.dev/opensource
Michael Kohler
200 yes 602 0
https://mkohler.dev/talks/
Michael Kohler
200 yes 889 0
https://mkohler.dev/blog/2015/02/treffen-der-deutschsprachigen-mozilla-gemeinschaft-tag-0-%28de-en%29/
Michael Kohler
404 no 44 5
https://mkohler.dev/blog/2015/02/treffen-der-deutschsprachigen-mozilla-gemeinschaft-tag-1-%28de-en%29/
Michael Kohler
404 no 44 6
https://mkohler.dev/blog/2015/02/treffen-der-deutschsprachigen-mozilla-gemeinschaft-tag-2-%28de-en%29/
Michael Kohler
404 no 44 4
https://mkohler.dev/feed.xml 200 no 0 47

Audit your own site — free

157 checks, internal PageRank, render-diff. No signup, results in ~30s.

Scan your site →