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Picture in Picture & Background

Overlay a second video or image, place a video on a coloured or image background, or add a slow zoom.

Free, no uploads, no sign-up. Runs 100% in your browser.

How Picture in Picture & Background works

Video work runs in ffmpeg.wasm, the FFmpeg toolkit compiled to WebAssembly (GPL build, loaded as a separate engine file of about 30 MB the first time, then cached).

Input: MP4, MOV, WEBM, MKV, AVI, JPG, PNG. Output: MP4.

How to use Picture in Picture & Background

1. Drop a video onto Picture in Picture & Background.
2. The first run downloads the ffmpeg engine (about 30 MB, once).
3. Set your range, format or quality options.
4. Process it (progress is shown live), then download.

Tips

• Shorter clips and lower resolutions process much faster.
• Processing speed depends on your CPU; plug in laptops for long jobs.
• Keep the tab in the foreground while encoding.

Picture in Picture & Background FAQ

Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Does it work offline?

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

Related tools

• Split Screen Video: Show 2 to 4 videos side by side, stacked or in a grid, with gap colour and sound choice.
• Resize Video: Change resolution or aspect ratio with platform presets, filling the space with a blurred copy or a colour.
• Watermark Video: Add a text or logo watermark to a video with position, size and opacity controls.
• Video Trimmer: Trim and cut clips with a visual timeline, no re-upload.