Merge Videos – Free Online Tool
Combine multiple video files into one. Join and concatenate videos seamlessly in your browser.
Example Output
Lossless stream-copy concatenation when all sources share codec/resolution/fps. Otherwise transcodes to a common format with no perceptible quality loss.
merged.mp4 — 2m, 1080p, seamless concatenation
What is Merge Videos?
Concatenate multiple video clips into a single file with drag-and-drop ordering. When all sources match codec, resolution, and frame rate, merging is instant and lossless (stream-copy). When they differ, the tool transcodes to a common format automatically — no manual conversion required.
Why use this tool?
- Open-and-go: bookmark the page once and never look for an alternative
- Instant results — no waiting on a server or upload progress bar
- Touch-friendly UI, fine on phones for on-the-go edits
- First-load downloads the WASM core once (~30 MB), then subsequent edits are fast
- No video upload — clips of any length stay on your local machine
How to use
- Upload multiple video files
- Arrange them in the desired order
- Click "Merge Videos"
- Download the combined video
Examples
Compilation reel
Four short product highlights merge into one continuous 2-minute demo for a sales page.
Multi-camera edit
Stitch sequential clips from a single shoot into one continuous take.
Wedding montage
Twenty short clips from a guest's phone merge in chronological order into one shareable video.
Common use cases
- Building demo reels from short clips
- Compiling tutorial segments into one lesson
- Stitching split phone recordings back together
- Creating wedding / event montages
- Producing single-file deliverables for clients
Troubleshooting
- Audio drifts out of sync between clips
- Sources have different sample rates. Enable "normalise audio" — the tool will resample all to 48 kHz before merging.
- Visible jump at clip boundaries
- Sources have different resolutions/fps so a transcode pass was needed; use the cross-fade option (0.5s default) to smooth boundaries.
- Merge fails with "incompatible codecs"
- Switch to "force transcode" mode. Stream-copy only works when every source shares the same codec; transcode converts everything to a common H.264/AAC base.
Frequently Asked Questions
Yes, you can merge videos of different formats. They will be converted to a common format during the process.
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