Audio & video
Trim video online
Set the start and end while it plays. Seconds to cut, nothing re-encoded.
Drop a video here
MP4, MOV, WebM, MKV, AVI · nothing is uploaded
How it works
- 1Choose the video, or drag it onto the box. It plays right here, so you can find the exact moment.
- 2Set the start and the end: drag the two handles, type a time, or press “Use current time” while the video plays.
- 3Choose Fast to keep the original quality, or Precise for a frame-exact cut, then download the clip.
Specification
- Fast cut
- Same format, same quality — nothing is re-encoded
- Precise cut
- MP4 (H.264 + AAC), exact to the frame
- Input
- MP4, MOV, WebM, MKV, AVI, 3GP and more
- Length limit
- None — hour-long recordings work
- Uploads
- None — the file never leaves your browser
Questions
Why does the Fast cut start a little earlier than I set?
Because a video can only be cut cleanly at a keyframe — a full frame the following frames build on. The Fast mode copies the stream untouched, so it begins at the keyframe just before your start time, typically within a second. If the exact frame matters, choose Precise: it decodes the clip and re-encodes it, so it starts and ends exactly where you asked.
Does trimming lose quality?
Fast does not: the frames are copied bit for bit, and the result is the same quality as the original. Precise re-encodes the clip at a high setting (H.264, CRF 20), which is visually indistinguishable for almost everything but is technically a second generation.
Which formats can I trim?
MP4, MOV, M4V, WebM, MKV, AVI, 3GP, MTS and most other common containers with the usual codecs. A Fast cut keeps MP4, MOV, WebM and MKV in their own container; anything that cannot be copied is re-encoded automatically.
Is there a length or file-size limit?
No. The video is read straight from your disk, so a 1 GB phone recording works. A Fast cut takes a few seconds regardless of length; Precise takes roughly as long as the clip you are keeping, because only that part is re-encoded.
Is my video uploaded anywhere?
No. The whole job runs in your browser using a WebAssembly build of FFmpeg, which the page fetches once (about 9 MB) and then caches. The file itself never leaves your device.
Is this the same as "cut video online"?
Yes. It also gets called "video trimmer online free" and "video cutter" and "trim mp4 online". They all describe this one job, and this page does it.