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Paste HTML and see a tree of H1-H6 headings with warnings for skipped levels, multiple H1s, and missing H1.
This heading structure validator runs 100% in your browser. Nothing you paste, drop, or generate ever leaves your device - no analytics on your input, no uploads, no logs.
Do this automatically with SoftSolz SEO Intelligence
Connect Google Search Console and get one ranked list of what to fix, write and refresh, with the figures behind every item and a straight answer on whether your changes worked.
HTML5 allows them in sectioning, but for SEO one H1 per page is safer.
Same browser-only philosophy. Free, no signup, no upload.
Audit image alt text - length, missing, decorative - across an HTML block.
Check WCAG AA / AAA contrast ratio between text and background colors.
Generate complete meta tags - title, description, OG, Twitter, robots, canonical - with live SERP preview.
Build complete Open Graph tags for Facebook and LinkedIn share cards.
Build Twitter / X card tags with summary or summary_large_image preview.
Build an XML sitemap from a list of URLs with priority and change frequency.
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