SEO issue · by CMS
Missing <!DOCTYPE html> (quirks-mode rendering risk) by CMS
The "Missing <!DOCTYPE html> (quirks-mode rendering risk)" issue affects 8 CMS groups; compare which platforms are most exposed.
8
CMS groups
CMS groups affected
Related
Catalog
Missing <!DOCTYPE html> (quirks-mode rendering risk)
Drupal
Gatsby
Jekyll
Joomla
Next.js
Shopify
Wix
WordPress
Audit your own site — free
157 checks, internal PageRank, render-diff. No signup, results in ~30s.