See your page's heading outline at a glance.
Visualize the H1–H6 hierarchy of any page, catch skipped levels and stray multiple H1s, and give screen-reader users the structure they depend on.
Everything you need for a clean outline
Real-time structure analysis for designers, developers, and QA — no source-diving, no guesswork.
Visual heading tree
See the full H1–H6 outline as an indented, color-coded tree built from the live DOM.
Skipped-level alerts
Instantly flags jumps like H2→H4 that break the logical reading order.
Multiple-H1 detection
Catches pages with zero or several H1s so your main topic is unambiguous.
Jump to element
Click any heading to scroll to and highlight it directly on the page.
From install to answer in seconds
Open on any page
Click the EqualWeb icon in your toolbar while viewing any website you want to check.
Scan the outline
The heading tree builds instantly from every heading on the page.
Fix the gaps
Spot skipped levels and stray H1s, then correct them with confidence.
Manual checking vs. Heading Structure
Manual checking
With Heading Structure
Built around the success criteria that matter
Heading Structure maps to the WCAG criteria for information structure and navigation, so your outline matches what assistive tech and auditors expect.
Free. Forever.
Every EqualWeb checker extension is completely free — no trial, no credit card, no account. Install it and start testing in seconds.
Add to Chrome — FreeNeed full-site compliance?
The free extension catches issues page by page. The EqualWeb platform automates remediation, monitoring, and audits across your entire site — and readers of this page get 10% off.
Questions, answered
Is Heading Structure really free?
Yes — 100% free with no trial, license, or account. The full EqualWeb platform is a separate paid product for organizations that need site-wide automation.
Does it send my data anywhere?
No. All analysis runs locally in your browser — the pages you check never leave your machine.
Which browsers are supported?
Chrome and all Chromium-based browsers, including Microsoft Edge, Brave, and Opera.
Do I need to be an accessibility expert?
Not at all. Results are shown in plain language with clear verdicts and the exact WCAG criteria behind them.
What is the 10% discount code for?
It applies to the EqualWeb platform — automated remediation, continuous monitoring, and full audits for teams that need site-wide compliance.
Add Heading Structure to Chrome
Free, private, and ready in seconds. Start testing today.