Video Converter & Trimmer
Free online video converter and trimmer powered by FFmpeg WASM. Convert to MP4, WebM, GIF, MP3 and more, trim clips, adjust quality — all in your browser, no uploads.
💡 All processing happens locally in your browser — files never reach a server
💡 First use loads the ~30MB FFmpeg engine; the browser caches it afterwards
💡 Large files take longer and use more memory; videos up to 100MB are recommended
FAQ
Is my video uploaded anywhere?
No. FFmpeg compiled to WebAssembly does all transcoding inside your browser — the file never leaves your device.
Which formats are supported?
Most browser-playable inputs work, including MP4, WebM, MOV and MKV. Output options: MP4, WebM, GIF, MP3, AAC and WAV.
Why is the first conversion slow?
The first run loads the FFmpeg engine (~30MB) from a CDN. The browser caches it, so later conversions start almost instantly.
Can I cut a clip out of a video?
Yes — set a start time and duration to trim, or just convert without trimming. Output quality is adjustable.