Video merger
Join several videos into one video file in your browser. The video engine produces an MP4 where it loads; if it cannot load, the tool re-records the joined video in your browser's supported recording format instead.
Files you choose stay on your device — they are not uploaded to Tools99.
Workspace: 1. Add files2. Ready3. Working4. Done — download
How this workspace works
- Choose several videos, in the order you want them.
- Join them in your browser.
- Download the single video and play the joins to check them.
Joined in your browser with ffmpeg into a real MP4 (stream copy when all inputs share a codec, otherwise re-encoded). Nothing is uploaded. If the engine cannot load, the page falls back to a browser re-recording and says so plainly.
Your file never left this device, so there is no server copy to delete. Download again, start over, or continue with a related tool below.
How to use Video merger
- Choose several videos, in the order you want them.
- Join them in your browser.
- Download the single video and play the joins to check them.
A good use for this
Stitching clips from one event into a single video to share.
Limits
The video engine produces an MP4 where it loads; if it cannot load, the tool re-records the joined video in your browser's supported recording format instead. Clips of very different sizes or frame rates may not join seamlessly.