Trim video
Cut a segment from a video in your browser. Fast stream copy first, automatic re-encode fallback for accuracy.
About this tool
Trimming is for cutting the dead air off the ends of a recording, isolating one moment from a long capture, or shortening a clip to fit a platform limit. You set a start point (seconds or mm:ss) and a duration, and the tool first tries a fast stream copy that never re-encodes: quality is untouched, although the cut lands on the nearest keyframe and can shift slightly.
When the fast path cannot produce a usable clip, the tool automatically re-encodes just that segment with H.264 and AAC for a precise cut. Everything runs locally through FFmpeg in your browser — the engine downloads once, your video stays in memory — with limits of four files per batch and 150 MiB per file.
How to use Trim video
- Choose up to four video files from your device.
- Enter the start time (seconds or mm:ss) and the clip duration.
- Run the trim, preview each result and download individually or as a ZIP.
Keep the original files and inspect the exported result before publishing or sharing it.
Frequently asked questions
Is the cut frame-accurate?
The fast path copies streams without re-encoding, so the cut starts at the nearest keyframe and can shift slightly. If the fast path fails, the tool automatically re-encodes the segment for a precise cut.
Does trimming reduce quality?
Fast mode never re-encodes, so quality is unchanged. The re-encode fallback uses H.264 (ultrafast, CRF 23) and AAC, which can slightly reduce quality.
Why did my file fail?
Encrypted or DRM-protected files, damaged media and unusual codecs are rejected. The 3-minute processing guard also stops runaway jobs; try a shorter clip.
Are my files uploaded?
No. FFmpeg runs on your device. The engine assets (about 32 MB) download on first use; your video stays in browser memory.
What are the limits?
Up to 4 files per batch, 150 MiB each and 250 MiB total. Start accepts seconds or mm:ss up to 24 hours; duration is capped at 3600 seconds.
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