Free tool · no upload
Bulk PDF accessibility checker
Drop hundreds of PDFs and get a score, page count, untagged and scanned flags, and a price for each file. Then draft alt text for the images, on your own device.
- Files never leave your device
- Parallel web workers
- On-device alt-text drafts
Checked on your device with open-source PDF.js and pdf-lib. No file data is sent to us or anyone else.
Your files
| File | Pages | Score | Result | Main issues | Estimate | Alt text |
|---|
What you get for each file
The same checks as our single-file checker, run in bulk. Contrast sampling and the tag-tree view stay in the single-file checker.
- Score and resultTagged or not, scanned or real text, and an automated risk score out of 100.
- Main issuesFailed checks such as missing language, title, alt text, headings or table headers.
- Pages and pricePages × $6, or × $12 for files with form fields: our published starting prices.
- Alt-text draftsOptional, on-device, clearly labelled as drafts for human review.
Questions about the bulk checker
No. The files are read from your device and checked in your browser, in background web workers, with the same open-source engine as our single-file checker (PDF.js and pdf-lib). No file data is sent to us or anyone else.
Up to 1,000 files per run, each up to 150 MB. Your computer checks several at a time; a few hundred typical PDFs take a few minutes. Phones work too, more slowly.
When you ask for them, your browser downloads the open Florence-2 vision model (about 255 MB, MIT licence) from Hugging Face once and caches it. The model then runs on your device with WebGPU or WebAssembly. Images are cropped from the PDF on your device and never sent anywhere. Every description is a draft that a person must review and edit.
Yes. Add your agency name, logo and colour in the branding panel. They are saved only in this browser and replace our name on the printed summary. The colour is darkened automatically if it would fail 4.5:1 contrast.
No. Automated checks cover only part of WCAG 2.2 and PDF/UA. A score is a risk indicator to help you sort files, not a conformance claim, certification or legal advice.
Too many files to fix in-house?
Send us the CSV. We quote from it and start with a free 10-page test.