Concatenate Videos
Join multiple video files end-to-end into a single MP4.
About Concatenate Videos
Concatenate Videos joins multiple clips end-to-end into a single MP4, playing one after another in the order you provide. Reach for it when you have screen recordings, phone clips, or rendered segments that need to become one continuous file. The whole join runs in your browser — your footage is never uploaded to a server.
- Category
- media
- Input
- Accepts: video/*.
- Output
- Outputs: video/mp4.
- Cost
- Free, runs in your browser
- Memory
- high
- Install group
- ffmpeg
Common uses
- Stitch a multi-part screen recording back into one file after stopping and restarting capture
- Combine separately filmed intro, demo, and outro clips into a single shareable video
- Join phone clips of an event into one continuous recording before sending it to family
- Assemble a sequence of rendered animation segments into a final deliverable MP4
- Merge several short social cuts into a longer compilation reel
- Concatenate trimmed lecture segments into one file for offline viewing
Frequently asked questions
What video formats can I input?
It accepts common video files (the picker allows any video/* type — MP4, MOV, WebM, and similar). All inputs are joined and the result is written out as a single MP4.
Do the clips need the same resolution or frame rate?
For the cleanest result, clips with matching resolution and frame rate concatenate most reliably. Mismatched dimensions can lead to uneven playback, so resize first if your sources differ.
Does the order matter?
Yes — clips are joined in the order you add them, so arrange them as you want them to play before running the tool.
Are my videos uploaded?
No. The processing happens entirely on your device in the browser. Nothing is sent to a server, which keeps private footage private.
Is there a limit on file size or number of clips?
There is no fixed server limit, but because everything runs in-browser, very large files or many long clips use significant memory and CPU. For big jobs, work in batches or downscale first.
Keywords
- video
- concat
- join
- merge
- combine
- append
- stitch