Merge videos — free, online

Between 2 and 10 per run. Add them in the order you want them to play — the first file you add becomes the start of the final video, and you can reorder or remove clips before merging.

Yes. Every clip is automatically fitted to the same 720p frame (letterboxed with padding so nothing is stretched) and the audio is normalized before joining, so mixed phone and camera footage merges cleanly.

Never. The merge (a WebAssembly build of FFmpeg, loaded unmodified from a CDN) runs entirely on your device. Your files are processed locally and are never uploaded to any server.

Yes — 100% free with no signup and no watermark, and there are no limits on how many merges you do (files up to 500 MB each are supported). Your merged video downloads straight to your device, ready to post.

The most common cause is a clip without an audio track: every clip needs audio (even a silent track) for the join to work. Corrupt or very unusual formats can also fail — try converting the problem clip to MP4 first.

Clips are re-encoded to a common format so they join reliably — quality stays high, but it’s not a lossless copy like simple same-format joins. For most social and YouTube use the difference is invisible.