SEO H1

Check H1, title, meta description, canonical and noindex on any page, or crawl a whole site for missing and duplicate H1.

SEO H1 checks H1–H6 headings and meta tags — instantly on the page you're viewing, or across a whole site in the background. For SEO specialists, developers and site owners who need to make sure nothing broke after a release. ✅ WHAT IT CHECKS • H1: missing, empty, multiple, same H1 on several pages • H2–H6: empty headings and skipped levels (e.g. H2 → H4) • Title and meta description: missing, empty, duplicates, length guidelines • Indexing: canonical (multiple, invalid, relative, pointing elsewhere), noindex and nofollow in meta robots and X-Robots-Tag • Broken internal pages (4xx) with the pages that link to them; redirects • Highlight headings right on the page 🔁 BEFORE & AFTER A RELEASE • Scan history for every site • Compare two scans: fixed / new / still there / not verified • Recheck only the pages you fixed • Ready-made tasks for developers and CSV export ⚙️ HOW IT WORKS • "Check this page" — instant, no access request • "Scan site" — whole site or one section, up to 5,000 pages, depth, speed and exclusions • Close the popup any time: the scan continues and results are saved • Respects robots.txt, slows down when the server asks, never opens logout, delete or cart links 🔒 PRIVACY Everything runs in your browser; reports are stored only on your device. Access is requested for one site, when you start its scan. ℹ️ LIMITATIONS The site scan reads server HTML and does not run JavaScript; for JS pages use "Check this page". The extension shows issues it finds and does not guarantee better rankings. Interface in 13 languages.