trim start and end
Video trimmer that cuts without re-encoding
Enter a start and an end time and keep only what is between them. Where possible the cut is made without re-encoding, so it finishes in seconds.
Files are processed on your device · nothing is uploaded, stored or logged
How it works
Pick your file. The browser reads it straight from disk. There is no upload progress bar, because there is no upload.
The encoder loads once. A WebAssembly build of FFmpeg, around 30 MB, downloads the first time you use the site and stays cached afterwards.
Your processor does the work. Everything happens in this tab, at roughly half of real time on a modern laptop.
Save the result. The finished file is assembled in memory and handed to your downloads folder.
Trimming first solves most size problems
File size scales almost directly with duration. Cutting a three-minute clip down to the thirty seconds that matter removes five sixths of the data before any compression is applied, which beats any quality setting.
It is also the fix when a file will not fit an upload limit. People reach for a compressor first and lose picture quality; trimming costs nothing visually because the frames that remain are identical.
Times can be written as seconds, as 1:30, or as 0:01:30. The end time is measured from the start of the original video, not from your start point.
Why the cut may land slightly off
When the fast path is used, the cut snaps to the nearest keyframe, which can shift the start by up to a couple of seconds. That is a property of how video compression works rather than a limitation here. If you need the cut exactly where you asked, the tool falls back to re-encoding, which is frame-accurate but slower.
Trimming first and compressing second gives a smaller file at better quality than compressing alone — finish with compress video.
Common questions
What time format should I use?
Seconds, or minutes and seconds like 1:45, or hours like 0:01:45. All three are understood.
Why did my clip start a second early?
The fast path cuts at keyframes. If exact timing matters, the re-encoded path is accurate to the frame.
Does the quality change?
Not on the fast path — the video is copied. On the fallback path the loss at Balanced is invisible in normal viewing.
Can I remove a section from the middle?
No. This keeps one continuous span. Removing a middle section means cutting twice and joining, which needs an editor.