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PDF Accessibility Checker
Check tags, alt text, language, title, headings, table headers, tab order and real text.
Free, no uploads, no sign-up. Runs 100% in your browser.
How PDF Accessibility Checker works
pdf-lib walks the structure tree to count figures with alt text, headings and table headers, and checks language, title and tab order. PDF.js checks which pages have real text.
Input: PDF.
How to use PDF Accessibility Checker
- Drop your PDF onto the PDF Accessibility Checker area, or click to choose it.
- Wait a moment while page thumbnails render locally.
- Choose the pages and options you need. Previews update as you go.
- Press the main action button and download the finished PDF.
Tips
- Encrypted PDFs must be unlocked first with Unlock PDF.
- Large scanned PDFs are mostly images. Compress PDF shrinks them the most.
- Your original file is never modified; you always download a new copy.
PDF Accessibility Checker FAQ
- Are my files uploaded?
- No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
- Is it free? Are there limits or watermarks?
- Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
- Does it work offline?
- Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.
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- Merge PDF: Combine multiple PDFs into one ordered document with drag-and-drop sorting.