vootkit

Heading Structure Checker

Find skipped levels and broken document outlines.

runs on your deviceno sign-upno watermarkno daily limit

What Heading Structure Checker does

Find skipped levels and broken document outlines. It's one of 133 tools in the Vootkit ecosystem, built to do a single job properly — open it, get your result, move on.

Why use this one

  • Nothing is uploaded. Your file is processed on your own device, so it never travels to a server.
  • No daily limit. Your device does the work, so there's no per-task cost to ration.
  • No watermark. What you get out is what you made.
  • Works on mobile. Same tool, thumb-friendly.

How it works

  1. Open Heading Structure Checker — nothing to install.
  2. Add your file or input. It stays on your device.
  3. Adjust the options to suit the result you need.
  4. Download or copy your result.

Example

Confirming your brand blue passes contrast on white before it ships.

Questions

Is Heading Structure Checker free?

Yes. Heading Structure Checker is free to use on Vootkit, with no account, no watermark and no daily task limit.

Are my files uploaded?

No. Heading Structure Checker runs entirely in your browser — your file is processed on your own device and never sent to a server. There is nothing for us to store or delete.

Do I need to install anything?

No. Heading Structure Checker works in any modern browser on desktop, tablet or phone. Open the page and start.

Is there a limit on how many times I can use it?

No. Because the work happens on your device rather than our servers, there is no per-task cost and therefore no daily cap.

Next in Accessibility

Contrast Checker

Check text against WCAG AA and AAA.

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Build a palette that passes contrast at every pairing.

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Colour-Blindness Simulator

See a design as different types of colour vision do.

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Alt Text Auditor

Find missing or unhelpful image alt text.

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Tap Target Checker soon

Flag controls smaller than the 44px minimum.

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Caption / SRT Validator

Check subtitle timing and formatting.

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This tool processes everything locally in your browser. You can disconnect from the internet after the page loads and it will still work.