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Video Watermark Editor

Add a logo or text watermark to any video — free, instant, and private. Upload your video, position the watermark anywhere, adjust opacity and size, then download. Everything runs in your browser. No upload. No server. No account.

1Upload Video

Click or drag to upload video
MP4, WebM — max 100 MB

2Add Watermark

Upload watermark logo (PNG)
PNG with transparent background works best

3Position & Settings

Quick Position
Opacity70%
Watermark Size25% of width
Margin from edge20px

4Export

Video Output: MP4

Video will be encoded at high quality with the watermark overlay. This may take a moment depending on video length and device speed.

Upload a video above to get started.

About Video Watermark Editor

Protect your videos and brand your content without leaving your browser. This tool uses FFmpeg.wasm to encode your watermark logo (PNG with transparent background) or custom text directly onto your video — all client-side, all private.

Common use cases: adding a copyright logo to your vlogs, branding tutorial videos before posting on YouTube, TikTok, or Instagram, protecting original video content, and batch watermarking video marketing assets.

How to Use

  1. Upload your source video (MP4, WebM).
  2. Upload a PNG watermark logo (transparent background recommended), or type text watermark.
  3. Choose a preset position or drag the watermark freely on the preview.
  4. Adjust opacity, size, and margin with the sliders.
  5. Click download and wait for the encoding process to finish.

Frequently Asked Questions

No. This tool runs 100% in your browser using FFmpeg.wasm. Your videos never leave your device. No upload, no server, no storage.
You can upload MP4 and WebM videos. Maximum recommended size is 100MB for optimal browser performance. The output is processed directly to a compatible MP4 format.
Yes — that's the recommended approach. Upload a PNG with a transparent background as your watermark logo. The opacity slider lets you further control how visible the watermark appears.
Since processing happens in your browser, very large videos may be slow to encode. For best performance, we recommend videos under 100MB and short duration.
Yes. You can type custom watermark text, choose font size and color, and position it anywhere on the video. Text and logo watermarks can also be used together.
Yes. The tool utilizes FFmpeg compiled to WebAssembly which modern mobile browsers support, but you may experience slower encoding times compared to desktop devices.

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