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Bluesky Alt Text Generator

Automatically generate detailed alt text & captions for images & videos using Google Gemini AI.

Upload Media

Supported: JPEG, PNG, GIF, WebP, MP4, WebM, MOV
Max size: 100MB

or drag & drop or paste from clipboard

Initializing...

Generated Alt Text

Ready to generate alt text

Chrome Extension Download the Extension from the Chrome Web Store.

Firefox Add-on Download the Add-on for both desktop & Android.

Safari Extension Coming soon!

GitHub Repository View the complete open source MIT licensed code.

Help & Feedback Visit @symm.app on Bluesky for assistance & updates.

Free & open source, for all, forever.

v1.0.0

Processing Logs

Large File Compression

You've enabled compression preference for files larger than 20MB. This will compress your video locally before processing.

Compression process:

Happens entirely on your machine (private & secure)
May take 2-3 minutes for very large files
Reduces file size and upload time
You can save the compressed file afterwards

Alternative: You can disable compression in Settings to use our new Files API for faster processing of large files up to 100MB.

Ready to compress and continue?

Don't show this message again

Settings

Processing Preferences

Prefer Compression for Large Files For files >20MB: compress locally vs. upload directly using Files API. Compression reduces file size but takes longer.

Dismiss Large File Warning Don't show compression warning for large files

Theme Effects

Sunrise/Sunset Effect Beautiful, expressive color transitions when switching between light & dark themes

Developer Settings

Use Development Server ⚠️ FOR DEVELOPERS ONLY - This will likely break the application for normal users! Only enable this if you're *very symmetrical*!