Pixelate part of an animated GIF with a mosaic filter. Place one or more areas over what should be hidden, move and resize them on the preview, and choose the block size. Every frame is filtered, so the result is still a fully animated GIF. Everything runs locally in your browser using WebCodecs — your file is never uploaded to a server, so it stays private and conversion starts instantly.
How to mosaic gif
- Drop a GIF onto the box above.
- Drag the pixelated area over what you want to hide and resize it by its corners. Add more areas if you need them.
- Set the block size, then click Create GIF to download.
Frequently asked questions
- Will the animation be kept?
- Yes — the mosaic is applied to every frame and re-encoded into a new animated GIF. Works on animated WebP and AVIF too (exported as GIF).
- Can I pixelate more than one area?
- Yes — click "Add area" for each one, up to 16.
- Is my GIF uploaded?
- No. Everything runs locally in your browser using WebCodecs — your file is never uploaded to a server, so it stays private and conversion starts instantly.