Combine Video Files Online
Merge Multiple Clips Into One
Need to use Combine Video Files Online right now?
Every clip re-encodes to a common format, so mismatched sources still combine successfully.
Add two or more videos, in order
Processed locally in your browser — never uploaded
Re-encodes every clip to a common format before joining, so videos can be merged even if they started with different resolutions, frame rates, or codecs.
Features
- Runs entirely in your browser
- Privacy-first — your data is never uploaded
- Real-time, instant results
- 100% free, no sign-up required
- Works on desktop, tablet, and mobile
- No installation needed
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About Combine Video Files Online
Stitching several video clips together into one continuous file — combining scenes, joining recordings from a multi-part event, or assembling a compilation — traditionally required a video editor just for a simple concatenation task. This tool joins any number of video files end-to-end using a real FFmpeg build compiled to WebAssembly, running entirely inside your browser.
Every clip is re-encoded to a common format (H.264 video, AAC audio) before joining, using FFmpeg's concat filter rather than the simpler concat demuxer — this is deliberately more robust, since it works correctly even when your source clips started with different resolutions, frame rates, or codecs, which a naive concatenation approach often fails on.
Clips are combined in the exact order shown in the list, with up/down controls to rearrange them before merging — the same reordering pattern used throughout this site's file-combining tools, so setting the right sequence is quick and visual rather than requiring you to rename files or guess at alphabetical ordering.
Because every clip is fully re-encoded rather than simply concatenated at the byte level, this handles genuinely mixed-source footage reliably — the trade-off is that merging takes real processing time proportional to the combined length of all the clips involved.
How it works
- Add two or more video clips. Select multiple video files to combine.
- Set the order. Use the up/down arrows to arrange the sequence.
- Merge and download. One combined video, re-encoded for compatibility.
Examples
Combining event recordings
Input
3 separate video clips from a multi-part event
Output
one continuous merged video file