Video Trimmer
Trim video precisely, change framing and speed, rotate or mute, then export MP4 or WebM.
Private by design
Your inputs stay on your device and are not sent to our servers. Optional usage analytics does not receive your files or tool inputs.
How to use Video Trimmer
- Add a video. Set exact times or use the trim sliders and preview the selection.
- Choose size, framing, speed, rotation and audio settings.
- Prepare the cut, review the encoded video and download.
What are the limits of Video Trimmer?
Files stay on your device. A pinned FFmpeg WebAssembly engine (about 31 MB) downloads from jsDelivr on first use; an internet connection and a modern WebAssembly browser are required. Processing uses one worker thread and can be slow or memory-intensive on phones. Cancel stops the worker. Export re-encodes media, strips metadata and cannot recover missing quality. Encrypted or DRM-protected media is unsupported. Up to 250 MB, 10 minutes of source and 10 minutes of output. Accurate cutting re-encodes the selection rather than making approximate keyframe-only cuts. Output is capped at 1080p with a 1920-pixel longest edge. MP4 uses H.264/AAC; WebM uses VP9/Opus. Native playback depends on browser codec support.