Validate H1–H6 hierarchy for SEO and accessibility.
Heading hierarchy looks good.
| Level | Text |
|---|---|
| H1 | Free JSON Formatter |
| H2 | Features |
| H3 | Tree view |
| H2 | FAQ |
More free utilities you might find useful
Quick answers to common questions
Clear H1–H6 hierarchy helps search engines and screen readers understand page structure.
Exactly one H1 per page is the SEO best practice.
Jumping from H2 to H4 without H3 — can confuse outline parsing.
Either works. The tool scans all h1–h6 tags in the HTML.
Paste HTML only. No server-side fetching (CORS-safe).
Yes.
Yes, if you paste rendered HTML output.
Yes.
Your data is processed entirely in your browser. Nothing is sent to any server.