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Split Screen Video
Show 2 to 4 videos side by side, stacked or in a grid, with gap colour and sound choice.
Free, no uploads, no sign-up. Runs 100% in your browser.
How Split Screen Video 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. Output: MP4.
How to use Split Screen Video
- Drop a video onto Split Screen Video.
- The first run downloads the ffmpeg engine (about 30 MB, once).
- Set your range, format or quality options.
- 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.
Split Screen Video 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
- Picture in Picture & Background: Overlay a second video or image, place a video on a coloured or image background, or add a slow zoom.
- Merge Videos: Join multiple clips into one video.
- Combine GIFs: Put animations side by side, stacked, in a grid, or one after another, with shared timing.
- Video Trimmer: Trim and cut clips with a visual timeline, no re-upload.