Create accessible image descriptions with AI-assisted review
Draft alt text, long descriptions and image text for charts, photos, infographics and logos. Each draft includes standards guidance from WCAG, PDF/UA, Section 508, EN 301 549 and AODA — and is ready for your review in context.
See an example
This is a saved example. Actual results need review in the context where the image will be used.
Suggested short alt text
Recycling energy savings compared with virgin materials: aluminum 75%, glass 40%, and plastic 95%.
Longer description
Infographic titled “Recycling Saves Energy.” Three colored circles labeled with percentages compare the energy savings of recycling versus producing virgin material: aluminum 75% (blue), glass 40% (green), and plastic 95% (orange). A small caption beneath reads “Energy savings vs. virgin material.”
Extracted image text
Recycling Saves Energy 75% Aluminum 40% Glass 95% Plastic Energy savings vs. virgin material
Built for accessibility work in
Government · Education · Healthcare · Legal
- Since 2006PDF accessibility experience
- Human reviewBuilt into every step
- WCAG 2.2AA guidance
- By specialistsNot just AI engineers
Many image descriptions fail the people who need them.
We built AlternativeText because we kept seeing the same gaps in real audits.
Alt text is hard to get right
Good alt text depends on purpose and context, not just what the image shows. Under deadline, it often gets skipped or filled with placeholders.
Generic AI tools miss the point
“A blue chart on a white background” is technically true and practically useless. Screen reader users need the trend, not the palette.
Standards expect real text alternatives
WCAG 2.2, PDF/UA, Section 508 and EN 301 549 all call for meaningful text alternatives. Missing or low-quality alt text is a common audit finding.
From image to reviewed description in three steps.
- Step 1
Upload
JPG, PNG, or WebP images up to 5 MB each, or a PDF up to 50 MB. Drag and drop, choose files, or paste from the clipboard.
- Step 2
Set context
Choose the standards to check against (WCAG, PDF/UA, Section 508, EN 301 549, AODA), the use case and any surrounding document context.
- Step 3
Review the draft
Check the short alt text, long description, image text, classification and rationale, then edit before you publish.
Built for accessibility teams.
Short alt, long description and image text
Each analysis supplies the outputs an image needs — short alt text, and a long description or image text where appropriate — ready to review and copy into your CMS, PDF or design file.
Image classification
Informative, decorative, functional, chart, infographic, logo, image of text or complex — so the description fits the image's purpose.
Standards guidance
Each result includes checks based on the standards you choose. They guide your review; they don't certify an image or document.
Charts described by their trends
Descriptions focus on direction, magnitude and comparison, not colours and shapes.
Text in images
Text found in an image is shown separately, so you can decide where it belongs.
Clear about your data
Images are sent to our AI provider for analysis. Batch progress is saved in your browser so you can pick up where you left off.
Invitation-only beta.
AlternativeText is in a controlled beta for accessibility teams. Tell us about your work and we'll consider you for an invitation.
AI drafts the description. People decide what ships.
Every result is a starting point for review by someone who knows the content and its context.