PowerPoint Accessibility Checker
Find missing alt text, empty titles and tiny text, and add the fixes you type
Drop a PowerPoint fileTap to choose a PowerPoint file
or click to browseor tap to choose
Check accessibility, in your browser
Large files (over 50 MB) may take longer or run out of browser memory
About PowerPoint Accessibility Checker
Checks a PowerPoint presentation (.pptx) for the accessibility problems that can be read from the file: pictures, charts and diagrams without alt text, alt text that is only a file name, slides with no title or an empty or repeated title, text under 12 pt, tables without a header row or with merged cells, links that just say "click here", slides whose reading order is out of step with the page, video and audio, text with no language set, weak colour contrast on solid fills, and a missing document title. Each problem names the WCAG success criterion it relates to. You get a list per slide, and a CSV of it.
This is a checklist of things found in the file, not a certificate: it cannot judge whether alt text is any good, text that is part of a picture, or whether captions exist, so a clean report does not mean the deck is accessible. Colour contrast is judged only for text on a solid fill the file states; text on pictures, gradients and the slide background is not. Mark purely decorative pictures as decorative so screen readers skip them. Titles are typed into the slide's own title box; a slide with no title box at all must be fixed in PowerPoint. Old .ppt files: open them in PowerPoint and save as .pptx first.
- Does a clean report mean my deck is accessible?
- No. It checks what can be read from the file: alt text, titles, text size, table headers, links, reading order, media, the language of the text, the document title and the contrast of text on solid colours. It cannot judge whether alt text is any good, text inside pictures, text on gradients or pictures, or captions.
- Does it check colour contrast?
- Partly. It compares the text colour with the solid fill behind it, in shapes and in table cells with their own fill, against the WCAG minimum of 4.5 to 1 (3 to 1 for large text). Text on the slide background, a picture or a gradient is not judged, so use PowerPoint's own checker for those.
- Does it check the language of the text?
- Yes. A slide whose text has no language set is listed, because a screen reader needs the language to pronounce it. In PowerPoint, select the text and use Review, Language, Set Proofing Language.
- Can I fix alt text here and keep the file?
- Yes. Type the alt text, a slide title or the document title next to the problem and the page builds a corrected copy of your .pptx with those words written into it. Your original file is not changed.
- Is my file uploaded?
- No. The deck is read in your browser and the corrected copy is made there too.
- Does it write alt text for me?
- No. Nothing is written for you. You type the alt text, or mark a picture as decorative, and only what you fill in is added to the file.
- What can be fixed here?
- Alt text and decorative marks for pictures, charts, diagrams and objects; the title of a slide that has an empty title box; and the document title. Other problems are listed so you can fix them in PowerPoint.
- Is the report saved anywhere?
- No. It is made in your browser and you can download it as a CSV. Nothing is uploaded.
How to use PowerPoint Accessibility Checker
Drop your .pptx and the report appears at once: problems to fix, items to check and tips, grouped by slide with a picture of each. Next to each problem that needs words, type the alt text or title, or tick that a picture is only decoration. The corrected file is built as you type; download it, and the page checks the new file again.
When to use it
Useful before sending a deck to a public audience, a customer, a school or a government body, or when a policy asks for accessible slides.
When not to use it
It does not replace PowerPoint's own checker or a person using a screen reader. For contrast on pictures and backgrounds, captions and the quality of descriptions you still need to look yourself.
Tips for best results
Describe what the picture shows and why it is there, in a sentence. Mark logos repeated on every slide as decorative. Give every slide a unique title; people who use a screen reader jump between slides by title.
Limitations
Colour contrast is judged only for text on a solid fill the file states (shapes and table cells with their own fill); text on the slide background, pictures or gradients is skipped, not passed. Not checked: the quality of alt text, text inside pictures, captions, and animation timing. Titles are typed into the slide's own title box; a slide with no title box must be fixed in PowerPoint. The result has not been checked in desktop PowerPoint.
Privacy
The deck is read inside your browser tab and is not uploaded. A request that counts the use goes to this site when you download and carries no part of your file.
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