Merge videos into one

Add two or more clips, arrange them in order, and download a single video. Every clip is scaled and letterboxed to match the first clip's resolution, so mixed sources work too.

Can I merge videos with different resolutions?

Yes — all clips are scaled (with black bars where needed) to the first clip's frame size and a common frame rate before joining, so the result plays smoothly.

Why do all clips need audio — or none?

A video where sound suddenly cuts out mid-way usually indicates an error, so mixing silent and sound clips is rejected. Mute the clips first (or add audio) to make them consistent.