Tools › Video
Merge videos into one
Join several clips in the order you choose. Clips of different sizes or frame rates are fitted into one frame with black bars or a blurred background, and the sound is kept.
How it works
- Drop your clips, then drag them into order. Each one shows its size, length and frame rate.
- When all clips come from the same camera or app settings, they are joined without re-encoding: lossless and fast.
- Otherwise every clip is decoded, scaled into the output frame and encoded again with WebCodecs. Audio is converted to one format, and clips without sound get silence, so everything stays in sync.
Questions
Can I join portrait and landscape videos?
Yes. Pick the output shape; clips that do not match are fitted inside with black bars or a blurred copy of themselves.
Does it keep the audio?
Yes. Audio from every clip is kept, and a clip without sound adds silence for its length so the later clips stay in sync.
Are my videos uploaded?
No. Everything happens in this tab, and the files are read from disk piece by piece.
Which formats can I mix?
MP4, MOV and M4V are joined with WebCodecs. If a clip is WebM or MKV, or uses a codec your browser cannot decode, the clips are joined with FFmpeg in WebAssembly instead, which is slower.