Hide faces, license plates, usernames or anything else with a mosaic (pixelate) filter. Draw one or more areas on the preview, drag and resize them to cover what should not be seen, and set the block size — bigger blocks hide more detail. Keyframe an area to make it follow a moving subject. Everything outside the areas is left untouched. 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 video
- Drop a video onto the box above, or paste a video URL.
- Drag the pixelated area over what you want to hide, and pull its corners to resize it. Add more areas if you need them.
- Set the block size — larger blocks hide more detail.
- Click Create MP4 to download the censored video.
Frequently asked questions
- Can I pixelate more than one area?
- Yes — click "Add area" for each thing you want to hide, up to 16 areas. Each one can be moved and resized on its own.
- How do I make the pixelation stronger?
- Raise the block size. Each block is the average color of the pixels under it, so larger blocks leave less detail to recognize.
- Can an area follow a moving subject?
- Yes, with keyframes. Open "Advanced · Keyframes", move the playhead and click "+ Key at" at a few moments where the area covers the subject; it moves smoothly between them. Once an area has keys, dragging it on the preview keys it at the playhead too.
- Is the video uploaded anywhere?
- 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.