Online Tool Store
Video Trimmer
Trim a video to a start and end time and download the clip as MP4, processed with FFmpeg compiled to WebAssembly. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
How it works
- Choose a video file — a preview loads with its total duration shown.
- Enter the start and end time, in seconds, for the clip you want.
- Click Trim video and download the result once it's ready.
FAQ
Is my video uploaded anywhere?
No. Trimming runs with FFmpeg compiled to WebAssembly, entirely inside your browser tab — the video file never leaves your device.
Why is the trimmed clip sometimes a second or two off from what I entered?
Trimming uses a fast "stream copy" (no re-encoding), which cuts at the nearest keyframe rather than the exact frame — that keeps it quick and avoids any quality loss, but the start point can land slightly before or after the second you typed, depending on the video's keyframe spacing.
What video formats are supported?
Most common formats (MP4, WebM, MOV, MKV) can be loaded for preview; the trimmed output is always saved as MP4.
Is there a file size or length limit?
No hard limit is enforced, but everything processes using your device's own CPU and memory — very large or very long videos may be slow or run out of memory on lower-powered devices.
How we compare
| Feature | Online Tool Store | Clideo | CapCut (desktop app) |
|---|---|---|---|
| No file upload — runs in your browser | ✓ | Uploads to a server | ✓ |
| No app install | ✓ | ✓ | Desktop app required |
| No watermark | ✓ | Free tier watermarks output | ✓ |
For a quick cut without an upload step, a watermark, or an app install, this gets you a trimmed clip in a couple of clicks.