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Images,put into words.

AltOne reads the images in your books, documents and courses, writes their alt text and long descriptions in your house style, and hands them to your reviewers. What they approve goes straight back into your files.

Start freeHow it works

No card required

A chart, a diagram, a photograph. To a reader who can’t see it, an image without a description is a gap in the middle of the page. AltOne closes that gap for every image you publish, and keeps a person in charge of every word.

How it works

From upload to approved, in four steps.

  1. Step 1: Bring in your content

    Upload books and documents, pick files from Google Drive, Dropbox or OneDrive, add a web page, or open AltOne from a Canvas or Moodle course. Every image is found, with the heading, caption and text around it.

  2. Step 2: AI drafts every description

    Alt text for each image, and a long description where a chart or diagram needs one, written to your house style. Decorative images are marked so screen readers skip them.

  3. Step 3: People review and approve

    Reviewers see each draft beside its image with checks for length, wording and your glossary. They edit it, ask for another with an instruction, or approve it. Nothing is done until a person says so.

  4. Step 4: Approved text goes back in

    Download your PDF, EPUB, Word, PowerPoint or web pages with the descriptions written into them, send them back to the course, or fetch them through the API.

Product

Not a caption generator. A publishing workflow.

  • House style

    Written the way your editors write.

    Set tone, length, words to avoid, a glossary and written guidelines once for the organisation. Every draft follows them, so a thousand descriptions read like one author wrote them.

    A generic caption

    Image of a chart showing revenue going up. (too vague)

    With your house style

    Bar chart of third-quarter revenue rising from ₹12.4M in 2024 to ₹24.1M in 2025 and ₹38.6M in 2026.

    • never start“Image of”
    • length≤ 150 characters
    • numbersread every value

  • Proof the work was checked

    A printable report for each project against WCAG 2.2 success criterion 1.1.1, with who approved what and when.

  • Inside Canvas and Moodle

    Open AltOne from a course through LTI 1.3, describe its images and send the approved text back.

  • Every edition, every language

    Translate approved descriptions so each edition and each reader gets the same care.

  • Roles for everyone involved

    Owners, admins, editors, reviewers, viewers and billing, with an audit log of every change.

  • An API for your pipeline

    Describe images from your own systems with scoped API keys, and get a webhook when they’re approved.

Reads from and writes back into

  • PDF
  • EPUB
  • Word
  • PowerPoint
  • HTML
  • QTI
  • Canvas
  • Moodle

Plus web pages, ZIP archives and images on their own, imported from Google Drive, Dropbox or OneDrive if they live there.

  • Tagged PDF
  • EPUB 3
  • Word .docx
  • PowerPoint .pptx
  • Web pages
  • QTI question banks
  • Canvas · LTI 1.3
  • Moodle · LTI 1.3
  • Google Drive
  • Dropbox
  • OneDrive
  • REST API
  • Webhooks
  • ZIP archives

Your content stays yours.

Built for institutions that answer to their students, authors and auditors.

How we protect your data

  • Not used for training

    Your images go to our AI providers only to draft descriptions, under terms that exclude training.

  • Two-step and single sign-on

    Authenticator codes, recovery codes, and Google or Microsoft sign-in.

  • Roles and an audit log

    Owners, admins, editors, reviewers, viewers and billing, with every change recorded.

  • Yours to take or delete

    Export your data or delete your account yourself, at any time.

Pricing

Pay for the images you describe.

One token describes one image. Repeated images aren’t charged twice, and a description that fails returns its token. Prices in Indian rupees; GST applies.

  • Starter Monthly

    ₹1,999 / month

    500 tokens a month

    For small teams and publishing catalogues.

  • Growth Monthly

    Most popular

    ₹7,499 / month

    2,500 tokens a month

    Most popular for educational publishing teams and editorial staff.

  • Enterprise Monthly

    ₹29,999 / month

    12,000 tokens a month

    High-volume image accessibility at university and catalog scale.

Compare plans

Questions about a large catalogue? Talk to us.

FAQ

Questions people ask.

Is AI-written alt text good enough to publish?
Not without a person checking it, which is why AltOne is built around review. The AI writes a first draft using the image and the text around it; your reviewers correct and approve it before it goes back into your files.
Which files can I use?
PDF, EPUB, Word (.docx), PowerPoint (.pptx), HTML and web pages, QTI question banks and ZIP archives of these, plus images on their own. You can also import from Google Drive, Dropbox and OneDrive, or work inside Canvas and Moodle courses.
Do you use my images to train AI?
No. Images and the text around them are sent to our AI providers only to draft descriptions, under API terms that exclude training on that data. Our Privacy Policy lists every sub-processor.
How do tokens work?
Each organisation has a token balance. Describing an image uses one token, and so does asking for a new version. Repeated images aren’t charged again, and if a description fails its token is returned.
Will AltOne make my content fully accessible?
AltOne deals with images: alt text, long descriptions and marking decorative images, which is what WCAG success criterion 1.1.1 asks for. Other parts of accessibility, such as reading order, colour contrast or captions, are outside what it does.
Can I get my data out, or delete it?
Yes. You can download your files with the approved text at any time, request a copy of your personal data, and delete your account from Settings.