🎞️ Video Merger & Joiner
Stitch intros, B-roll, takes and outros into one video without installing an editor. Clips with different sizes and formats are normalised automatically.
✅ Free · No sign-up
Choose video clips or drag them here
MP4, MOV, WebM, MKV … · up to 10 clips · processed on your device
MP4, MOV, WebM, MKV … · up to 10 clips · processed on your device
How to use the Video Merger & Joiner
- Add your clips (they are listed in name order; reorder with ↑/↓).
- Optionally set a start/end trim and mute any clip.
- Choose the output resolution, how to handle different shapes, frame rate and format.
- Press Merge clips, preview the result and download it.
Why creators use it
- Add the same intro and outro to every video.
- Join several phone takes or screen recordings.
- Combine Shorts into a compilation.
Good to know
- Every clip is re-encoded so different sizes, frame rates and codecs join cleanly. This takes time in a browser: roughly real-time or slower for 720p, slower for 1080p.
- Total input is limited to what your device memory can hold (about 500 MB on typical computers, less on phones).
- Clips without sound get silence, so audio stays in sync.
Frequently asked questions
Do my videos get uploaded?
No. Merging runs with FFmpeg compiled to WebAssembly inside your browser.
Why is 720p the default?
Browser encoding is single-threaded; 720p is much faster than 1080p and fine for most social uploads.
Can it join clips without re-encoding?
Not in this tool: lossless joining only works when every clip has identical codecs and settings, which is rare for mixed sources.