Video Merger — Two Clips In, One MP4 Out

How to use

1. Drop clip A and clip B.
2. Press Merge.
3. Download combined.mp4.

About this tool

Stitching clips shouldn't require an upload queue. Drop two clips recorded with the same device/codec (phone MP4s, screen captures) and the concat demuxer joins them with stream copy — no re-encode, no quality loss, seconds not minutes. The output is a single MP4 ready to share. If your clips use different codecs, re-encode each to MP4 first with our Video Converter, then merge. Your file never leaves this page — processing runs in your browser via WebAssembly; nothing is uploaded and the file is dropped from memory when you close the tab.

FAQ

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