Trim Video

Trim Video cuts a selected time range and writes it as a new MP4 on your device.

Keep only the part between a start time and an end time.

FREE · NO ACCOUNT · RUNS ON YOUR DEVICE

Files stay on your device

In practice

What you can count on

Specification

How to

1
Choose the video
Drop or choose the source video.
2
Enter start and end
Use 00:00:05 to begin at five seconds, for example, and an end later than the start.
3
Trim and save
Create the selected clip and download the new MP4.

Questions

Yes. You can use seconds, MM:SS or HH:MM:SS.

No. The selected range becomes a separate MP4 file.

Re-encoding lets the requested times be accurate instead of moving the cut to a nearby keyframe.

No. The cut is made in a browser worker on your device.

Background

Enter the start and end as hours, minutes and seconds. The selected part is re-encoded for a clean, broadly playable MP4 result.

Only one continuous section is kept in each run.
Re-encoding takes longer than copying keyframes but makes the requested boundaries more dependable.

Specification of the Trim Video tool
Input	One supported video.
Time input	HH:MM:SS, MM:SS or seconds.
Output	One H.264 MP4 with AAC audio.
Cut accuracy	The selected range is re-encoded rather than limited to existing keyframes.
Original	The source file is not changed.
Where it runs	In the browser on your device.

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