Split Screen Video Maker — Free, No Upload
Combine two videos side by side or stacked. Clips are auto-aligned. Runs in your browser — no upload, no watermark.
⬛ Side-by-side · stacked🔒 No upload
🎬
Drag & drop your video here, or click to browse
Max file size: ~2 GB (memory permitting)
Who uses the split-screen
- Content creators preparing footage for YouTube, Instagram, TikTok, or X who need a quick fix without installing software.
- Teachers, marketers, and students who want a no-learning-curve way to handle everyday video tasks.
- Developers and editors who need a predictable FFmpeg-backed result on any machine.
Supported formats & limits
| Input containers | MP4, MOV, WebM, MKV, AVI, FLV, WMV, M4V |
|---|---|
| Input codecs | H.264, H.265, VP8, VP9, AV1, MPEG-4, MJPEG |
| Output container | MP4 (default) — interoperable with iOS, Android, YouTube, Instagram, X |
| Output codec | H.264 video + AAC audio |
| Max file size | Up to ~2 GB (limited by browser memory) |
| Max duration | No hard limit — depends on file size |
| Cost | Free for any use. No signup. No watermark. |
Why choose this split-screen
- 100% private — your files never leave your browser, so nothing is uploaded to our servers.
- No watermark, no signup, no hidden limits. Completely free to use, for any purpose.
- Runs on top of FFmpeg compiled to WebAssembly, giving you the same results professionals get in the terminal.
- Works on desktop and mobile, on any OS — only a modern browser is required.
Frequently Asked Questions
How many videos can I combine?
Two clips — side by side, or stacked top and bottom. It is ideal for comparisons, duets, and reaction-next-to-content layouts.
Do the clips need to be the same size?
No. Each clip is automatically scaled to share a common edge (same height for side-by-side, same width for stacked) so the join lines up cleanly.
What happens if the clips are different lengths?
The output ends when the shorter clip ends. Trim them to the same length first if you want both to play fully.
Is anything uploaded?
No — both clips are combined locally in your browser with FFmpeg WebAssembly.