Add Watermark to Video

Burn your logo or a watermark image onto a video — in your browser.

选择音频或视频文件

MP3、WAV、M4A、MP4、MOV、WebM —— 用 Whisper 在浏览器中转写

点击选择，或将文件拖到此处

如何 Add Watermark to Video

1
Add your video
Drop in an MP4, MOV or WebM — it's read in your browser, never uploaded.
2
Add your logo
Drop in a PNG, WebP or JPG — a PNG with a transparent background works best.
3
Position and download
Pick a corner, size and opacity, then click Add watermark.

Is my video uploaded?+

No. The logo is burned into the video entirely in your browser.

What image formats work for the logo?+

PNG, WebP or JPG. PNG with a transparent background looks best, since the logo is drawn exactly as-is over the video.

Can I make the watermark semi-transparent?+

Yes — the opacity slider goes from barely-there to fully solid.

Which browsers work?+

Chrome, Edge and Safari 17+ — burning it in needs WebCodecs.

你们会把我的文件上传到服务器吗？+

不会——这里的每个工具都完全在你的设备上处理文件，不会向服务器上传任何内容。唯一的例外是 AI 工具，它们会把提取的文本（而非文件本身）发送给 Claude 来完成工作。

有文件大小限制吗？+

我们没有人为设置限制，但由于处理过程在你的浏览器中进行，非常大的文件（超过 500MB 或 1000 页）会受到你设备内存的限制，而非我们的限制。