Trim Video
Pick the file, set start and end, download the section. The video is processed by ffmpeg compiled to WebAssembly, running inside your browser — the file never goes to a server, which is the difference from practically every video trimming site.
# processed in your browser. no request leaves this page.
How it works
In fast mode the command is -ss before -i with -c copy: ffmpeg copies packets without reprocessing, so the cost is reading and writing the file. The consequence is that the cut can only start on a keyframe, so the start may shift by a few seconds. Turning fast mode off re-encodes with libx264 and hits the exact frame, at the cost of time.
- Fast cut by stream copy, nearly instant even on a large file
- Optional exact cut, with re-encoding, when the start must land on the right frame
- Times accepted as 90, 1:30 or 00:01:30.5
- Result preview and direct download, no watermark