Add watermark
Add a text or image watermark to any video. Choose position, opacity, and size. Everything stays on your device.
Drop your video here
or click to browse: MP4, MOV, AVI, WEBM, MKV
What this tool does
Protect your video content or brand it with a text or image watermark. Place it in any of nine positions (top-left through bottom-right), adjust the opacity from fully transparent to fully opaque, and set the font size for text watermarks.
For text watermarks, the tool uses FFmpeg's drawtext filter with a subtle shadow for legibility. For image watermarks, it composites your uploaded PNG/JPG/WEBP on top of the video with the alpha channel you specify.
The output is always MP4 with H.264 video and AAC audio.
Frequently Asked Questions
Does this upload my video?
No. The entire process runs inside your browser using WebAssembly. Nothing is uploaded anywhere.
Can I use my own logo as a watermark?
Yes. Switch to image mode and upload any PNG, JPG, or WEBP image. It will be placed at the position you choose with the opacity you set.
What font is used for text watermarks?
Text watermarks use the default sans-serif font available in FFmpeg's built-in rendering. For branded watermarks, we recommend using an image of your logo instead.
Can I adjust the transparency?
Yes. The opacity slider lets you set the watermark from fully transparent (0%) to fully opaque (100%). The default is 70%.
Last updated: 2026-07-25