Set the title, language and tab order that every accessibility checker flags — and get a straight answer about the parts no tool can fix. Free in your browser — no sign-up, no watermarks.
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Three of the most commonly failed checks in a PDF accessibility audit have nothing to do with the content: the document has no title, so a screen reader announces the filename letter by letter; it declares no language, so a French document is read with English pronunciation; and the viewer is told to prefer the filename over the title anyway. All three are settings, all three are real barriers, and all three can be fixed on a finished file. What cannot be fixed is the tag structure — and this tool says so rather than pretending.
PDF is the universal document format: it locks layout, fonts and images so a file looks identical on every device and printer. Scans, invoices, forms, e-books and reports all travel as PDF. Because a PDF is a container rather than an image, turning its pages into JPG or PNG pictures — or bundling pictures into a PDF — are among the most common file tasks there are.
Search for a way to make a PDF accessible and you will find tools that promise it in one click. They cannot deliver it, and it is worth understanding why before trusting any of them — including this one.
An accessible PDF is a tagged one: it carries a parallel structure describing which text is a heading, which is a list, what order things should be read in, and what each image shows. That structure is created by the program that made the document, from information it had and the PDF did not keep. Once the file exists, that information is gone. No tool can look at a finished PDF and know whether a large bold line is a chapter heading or a pull quote, and none can write alt text for a photograph it has never been told the purpose of.
Three of the most commonly failed checks in an accessibility audit are not about content at all. They are settings, they are real barriers, and they can be corrected on any finished file:
No document title. A screen reader announces an untitled PDF by its filename — "report dash final dash v three dash b dot p d f", read out character by character. No declared language. A screen reader with no language to work from applies the wrong pronunciation rules to every word, which turns a French or Turkish document into noise. The viewer told to prefer the filename. A document can carry a perfectly good title and still be announced by its filename, because using it is a separate flag that almost nothing sets.
Tab order is fixed too: keyboard navigation should follow the document’s structure rather than the order things happened to be added, which is a PDF/UA requirement and a genuine problem for anyone who does not use a mouse.
A PDF has a flag that says "this document is tagged". Setting it on a file that has no tags makes automated checkers report a pass — and changes nothing whatsoever for the person using a screen reader. That is worse than the honest failure it replaces, because it removes the signal that would have got the document fixed properly.
So this tool sets that flag only when the tag structure is genuinely present and merely undeclared. On an untagged file it leaves the flag alone and tells you that tagging is what is missing, along with what to do about it: export the document again from the program that made it, with tagging turned on. In Word, LibreOffice and InDesign that is a checkbox, and it is the whole job.
Run PDF Accessibility Checker on the document first to see what it actually fails, then use this to clear the parts that are clearable. What is left is the honest list of work that needs the original file.
Yes — completely free, with no sign-up, no watermarks and no daily quota. Processing happens in this browser, so the practical limit is the memory available on your device.
Yes. Add as many files as you like — each one is processed in sequence with its own progress status, and you can download the results individually or all together as a ZIP archive.
No. Pages are copied at the object level — text, fonts, images and vector content are carried over as-is, without re-rendering. The output keeps the same sharpness and searchable text as the original.
No, and anything that claims to is misleading you. Real accessibility needs a tagged structure — headings, lists, reading order — and alt text on every image, none of which exists to be recovered from a finished PDF; that information was discarded when the file was made, so it has to be exported again from the original with tagging enabled. This fixes the document-level failures and tells you exactly what is left. It will never mark an untagged file as tagged, because that turns a real failure into a false pass.
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