Trim video
Cut from start to end timestamp (HH:MM:SS).
About this tool
Cut a section out of a video by setting start and end times. Stream-copy mode keeps the original quality and is nearly instant - perfect for chopping the boring intro off a screen recording, isolating a clip from a long camera take, or preparing a single highlight from a Zoom recording.
Privvert's video trimmer is browser-based via FFmpeg-WebAssembly, so confidential client footage, raw interview takes and personal videos never get uploaded. You can choose between fast lossless stream-copy or precise re-encode trimming when you need cuts at exact frames.
Features
- Stream-copy mode: instant, lossless, no re-encoding
- Re-encode mode: frame-accurate cuts at the cost of speed
- Reads MP4, MOV, MKV, WebM, AVI and most other containers
- Preserves audio in sync with video
- Decimal-second start/end inputs (e.g. 12.5)
- Browser-only - your footage never leaves your device
- No file size cap beyond your browser's memory
How to use it
- Drop in a video file.
- Set start and end times in seconds.
- Pick stream-copy (fast, lossless) or re-encode (slow, frame-accurate).
- Click Trim and download the result.
Everything happens inside your browser using JavaScript and WebAssembly. Your files are never uploaded to a server, never stored, and never seen by us.
Frequently asked questions
Stream-copy can only cut at keyframes (typically every 1-10 seconds). Switch to re-encode mode for exact frames at the cost of processing time and a small generational quality loss.
No - it copies the existing video and audio bytes directly without decoding or re-encoding. The output is bit-identical to the source within the trimmed range.
Yes. Both modes preserve A/V sync; in stream-copy mode the audio is also trimmed at the nearest aligned point.
This tool extracts one continuous section. To stitch multiple sections, trim each one and then use the video merge tool.