Trim Video

How to trim a video

1. Choose a video file, or drop one onto the box.
2. Set the start and end times in seconds.
3. Tick the exact box if you need a frame-accurate cut.
4. Press Trim video and download the result.

Cutting a video down

Trimming keeps the section between your start and end times and discards the rest. It is the quickest way to cut a video down to the part that matters. As a video trimmer it lets you trim mp4 files, shorten a video, or cut video online without an upload, whether that is removing a slow opening, grabbing one moment from a long recording, or getting a file under a size limit by keeping less of it. The tool reads the video's length when you choose it, so you can see what you are working with.

Fast copy or exact cut

By default the tool copies the video and audio streams without re-encoding them. That is close to instant even on a long file, and it does not lose any quality, but it can only cut at a keyframe. Keyframes are spaced out through a video, so the real start may land slightly before the time you asked for. Tick the exact box and the tool re-encodes instead, which cuts precisely at the frame you chose but takes as long as a normal conversion. Use the fast copy unless the exact frame matters.

Trim before you convert

If you have a long video and only need part of it, trimming first and converting afterwards is much faster than the other way around, because every later step then works on a shorter file. That applies to compressing, converting to WebM, and especially to making a GIF, where length drives the size directly.

Runs on your device

Nothing is uploaded, so there is no size cap and your video stays private. The first use downloads a converter of about 31 MB, once, which your browser then caches. With a stream copy the trim itself is fast regardless of how long the source is; the exact re-encode scales with the length you keep.

FAQ

How do I cut a video?

Choose the file, set the start and end times in seconds, and press Trim video. The section between those times is kept and offered as a download.

Why is my cut slightly off?

The fast method copies streams without re-encoding, so it can only cut at a keyframe and may start a moment early. Tick the exact box to re-encode for a frame-accurate cut.

Does trimming reduce quality?

Not with the default stream copy, which keeps the original data untouched. The exact option re-encodes, which involves a small quality loss.

Can I trim a long video?

Yes. A stream copy is fast even on long files because nothing is re-encoded. The exact option takes longer, roughly in proportion to how much you keep.

Is my video uploaded?

No. The trim happens in your browser and the file never leaves your device.