Video Merger
Combine two or more clips into a single MP4. When the inputs match, they're stream-copied (fast, lossless); when they differ in resolution or codec the tool warns you and re-encodes to a common format so the joins are seamless. Drag to reorder, no upload, no account.
How to use this tool
- 01
Add your video files
Drag and drop them in the order they'll play, or click to add — MP4, MOV, MKV, WebM.
- 02
Reorder if needed
Drag rows (or use the up/down controls) to fix the sequence before merging.
- 03
Merge
The tool auto-detects whether a stream copy is possible (fast) or re-encoding is needed (slower).
- 04
Download the merged file
Preview the joins in the player and verify playback before deleting your source files.
Why this matters
Building a supercut or stitching recorded segments together shouldn't require uploading gigabytes to a server or learning the FFmpeg concat syntax. The hard part is that the fast stream-copy join silently breaks when clips disagree — which is the common case for user footage from different devices.
This tool probes every clip, takes the instant stream-copy path when they match, and automatically re-encodes (with a clear warning) when they don't, so the output always plays. To make a mismatched set uniform up front and keep the fast path, run the clips through the Video Format Converter first.
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FAQ
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