Documentation

Go to imbricalt.com/app and drop an image. Imbricalt generates descriptive alt text and lets you download the image with the description embedded into its IPTC and XMP metadata. No account needed for your first 5 generations.

Once you have an Imbricalt-processed image, install the Chrome extension. It detects the Imbricalt signature in the image metadata and displays the alt text as a floating label wherever the image appears on the web.

Alt text is written directly into the image file using industry-standard metadata fields:

Once embedded, the alt text travels with the file. Upload it to any CMS, site, or platform — the description follows. The Imbricalt Chrome extension scans pages for the imbricalt:processed signature and surfaces the description as a floating label.

The Chrome extension makes Imbricalt useful everywhere. Once an image has been processed, its description lives inside the file itself. The extension:

1. Scans all images on the page
2. Reads the JPEG APP1 / PNG iTXt chunk to detect the Imbricalt signature and extract the alt text
3. Displays a floating label over each processed image with the description and a copy button
4. No API calls, no configuration, no permissions beyond fetching image bytes

Load it unpacked from chrome://extensions after unzipping.

Pro users can generate and embed alt text programmatically via the Imbricalt API. You'll need an API key from the settings panel.

curl -X POST https://imbricalt.com/api/process \
  -H "X-API-Key: af_key_..." \
  -F "image=@photo.jpg"

curl -X POST https://imbricalt.com/api/download \
  -H "X-API-Key: af_key_..." \
  -F "image=@photo.jpg" \
  -F "altText=A person walking in a park" \
  -o photo-with-alt.jpg