Trim MP4 Video
Cut and trim MP4 video files — no re-encoding, instant results. Free, private, no upload.
Trim any MP4 video instantly without re-encoding. Drop your MP4 file, set start and end points with the visual timeline, and download the trimmed clip. Stream copy preserves full quality. Runs entirely in your browser — no upload needed.
No data transfer — all data stays on your device!
About MP4 Trimming
MP4 (MPEG-4 Part 14) is the most widely used video format. This tool trims MP4 files using FFmpeg WebAssembly with stream copy (-c copy), which means the video and audio streams are extracted without re-encoding — preserving 100% of the original quality while being nearly instant.
Features
Near-Zero CO₂
Server-based converters upload your file, process it remotely, and send it back — consuming network and data-centre energy on every request. WebConverter runs entirely on your device, so the only energy used is your local CPU. No data transfer, no server electricity.
Install for Offline Use
WebConverter works offline as a Progressive Web App. Click "Add to Home Screen" on mobile or the install button in your browser's address bar. Once installed, you can convert files without any internet connection.
