Merge videos online
Combine several clips into one — reorder them, trim each, pick an output shape and add a transition, then export an MP4. Your files are read on your device and never uploaded — no account, no watermark.
Drop videos here, or choose them from your device
MP4, MOV, WebM · pick two or more · stays on your device
Free clips from the catalog work too — open any clip, download it, then add it here.
Drag a clip's edges to trim it · drag the white playhead (or click the track) to scrub · use ‹ › to reorder
Questions
Are my videos uploaded anywhere?
No. Every clip is read straight from your device and joined inside your browser with a WebAssembly build of FFmpeg. Nothing is sent to a server, so there is nothing to delete afterwards.
Can I merge clips of different sizes?
Yes. Pick an output shape (9:16, 1:1, 4:5, 16:9 or the first clip’s size) and each clip is scaled into it — padded to keep the whole frame, or cropped to fill. Different resolutions, frame rates and orientations are all handled.
Can I add transitions between clips?
Yes — choose a crossfade, dissolve, slide or wipe and set its length. Set it to None for a hard cut. The transition is rendered into the exported file.
Is there a watermark or sign-up?
Neither. No account, no email, no watermark on the export.
How many clips, and how long?
There is no hard limit, but your own device does the encoding, so a few short clips finish quickly while many long 4K files take longer and use a lot of memory. Trim each clip to what you need first. Output is capped at 1080p on the long side.