Converter
Generate Alt Text for Your PDF's Images
Every meaningful image needs a description a screen reader can speak — written into the PDF's structure, not pasted in a document nobody ships.
Alt text in a PDF lives inside the tag structure: each Figure element carries a description assistive technology reads aloud. Two problems make it perpetually missing — most PDFs have no tag structure to attach it to, and describing dozens of images is tedious. Ceereo solves both in one pass: the document is tagged, and vision analysis drafts a meaningful description for each image — what the chart shows, what the photo depicts — placed on the Figure element itself. You get the audit first, free; the fixed file carries the descriptions inside it.
Pixel-identical output Minutes per document Try without signing up
Last updated: August 6, 2026 · Reviewed by the Ceereo team
Free audit, no signup — your full report opens on the next page.
How it works
How to generate alt text for your pdf's images in four steps
The fastest way to generate alt text for your pdf's images without manual copy-paste, screenshots, or formatting cleanup.
- Step 1
Upload your Word document
Drop in the messy .docx you want cleaned up. Your file is processed only to format it and is never used to train models.
- Step 2
AI reads the structure
The AI detects headings, body text, lists, and tables, and finds inconsistent styling, without changing any of your wording.
- Step 3
Formatting is fixed
Heading styles, alignment, spacing, fonts, lists, indentation, and margins are made consistent across the whole document.
- Step 4
Download the clean .docx
Get a still-editable Word file that opens in Microsoft Word, Google Docs, and LibreOffice: clean formatting, your words unchanged.
In short
PDF alt text lives on Figure tags inside the document's structure — which is why untagged PDFs can't have any. Ceereo tags the document and drafts meaningful, vision-generated descriptions for each image (what a chart shows, not 'an image'), written directly into the file and verifiable in any tag inspector.
How do I add alt text to a PDF?
Alt text attaches to Figure tags in the PDF's structure tree, so the document must be tagged first; then each figure's tag gets an /Alt description. Manually that's Acrobat's tag panel, image by image. Ceereo automates both steps — tagging plus vision-drafted descriptions of what each image actually shows — and the result is inspectable in any PDF tag viewer.
Descriptions with content
"Chart" is not alt text
The word 'image' read aloud tells a blind reader nothing. Useful alt text carries the information the image was doing on the page — 'bar chart: revenue rising from $2M to $8M, 2020–2024'. Vision models are genuinely good at this now; the craft is putting those drafts into the right structural slot in the file, which is the part this tool owns.
Features
Why teams choose Ceereo for generate alt text for your pdf's images
Vision-drafted descriptions
Charts described by their data story; photos by their subject — not filename guesses.
Written into the structure
Descriptions live on the Figure tags in the file, where assistive tech reads them.
Reviewable
The report lists every generated description so you can spot-correct the ones that matter most.
Use cases
Where generate alt text for your pdf's images works best
Chart-heavy reports
Annual reports and dashboards where figures carry the argument.
Product manuals
Diagrams and steps a blind user otherwise loses entirely.
Audit findings
'Figures missing alternate text' resolved across the document in one pass.
Why not just copy-paste?
Ceereo vs. doing it manually
Fixing formatting by hand takes ages and rarely comes out consistent. Here's the difference.
Output quality
What the cleaned document looks like
Every generate alt text for your pdf's images run produces a tagged, machine-verified PDF that is pixel-identical to your original. Here's what you get.
- Figure tags with meaningful /Alt descriptions
- Decorative furniture marked as artifacts instead of described
- Full tag structure included (alt text requires it)
- Machine-verified, pixel-identical output
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Frequently asked questions
Are AI descriptions good enough?+
For most figures, modern vision models produce genuinely informative drafts — and the report shows you each one for spot-review. High-stakes images (medical, legal) deserve your own wording; edit those and keep the rest.
What about purely decorative images?+
Decoration shouldn't be described — it should be skipped. Borders and flourishes are marked as artifacts so screen readers pass over them silently.
Can I bring my own alt text?+
Spot-editing arrives with the review workflow; today you get vision drafts plus the report listing them all.
Describe your document's images
Free audit shows what's missing; the fix writes real descriptions into the file.