Add watermark

Drop a video, add your name or logo, place it in a corner or repeat it across the picture, and save. The mark is drawn into every frame on your device; the sound is kept as it is.

How to use it

  1. Drop a video or click to choose one.
  2. Pick Text or Logo and set what the mark says or looks like.
  3. Choose the position, size and opacity; the preview updates as you go.
  4. Click Start and download the video.

Frequently asked questions

Can I use a logo with a transparent background?

Yes. A PNG, WebP or SVG with transparency keeps it, so only the logo itself is drawn over the picture.

Does adding a watermark reduce the video quality?

The video has to be re-encoded because the mark becomes part of each frame. The encoder is set to a high quality; the sound is copied unchanged.

Is there a file size limit?

No fixed limit. The video is read in small slices and the result is streamed to your disk, so even multi-gigabyte files work without filling up memory.

Is my video uploaded to a server?

No. The file is read and written inside your browser tab using WebCodecs — nothing is uploaded, there is no account and no watermark. Once loaded, the page also works offline.