Free heading analyzer: paste HTML to inspect H1–H6 outline, counts, and common issues like missing H1, multiple H1s, or skipped levels. Browser-only.
No. Heading Analyzer runs in your browser. Nothing is uploaded to our servers for the core path. Keep using a private device when handling unpublished drafts.
Yes. Free to use without creating an account. Ads may appear outside the tool workspace according to site monetization rules.
Modern Chromium-based browsers and current Firefox/Safari builds work for most tools.
Clear the page when finished, avoid shared kiosks for secrets, and never paste production credentials into screenshots you share publicly.
After the page loads, most pure client tools continue to work without network calls.
It parses H1–H6 tags from pasted HTML, shows an indented outline, counts each level, and flags common structure issues that hurt readability and SEO clarity.
HTML5 allows multiple H1s in some designs, but many SEO style guides still prefer one primary H1. This tool warns so you can decide intentionally.
Jumping from H2 to H4 (for example) often means the outline is incomplete. Fixing skips helps screen-reader users and editors scanning the page.
Readability Checker scores prose difficulty. Heading Analyzer focuses on document outline structure from HTML tags.