Video Converter
Convert MP4, WebM, MOV, MKV and AVI to MP4/WebM/GIF/MP3 in your browser with FFmpeg WASM. Compress, resize, mute — no upload.
Drop a video here or click to browse
MP4 · WebM · MOV · MKV · AVI — converted locally, nothing is uploaded
Video runs in WebAssembly (FFmpeg core ~30 MB, fetched on first use and cached by your browser). Large files are limited by your device's memory. Engine: FFmpeg (GPL-2.0-or-later) compiled to WebAssembly via ffmpeg.wasm.
Über dieses Tool
Video Converter transcodes video entirely in your browser using FFmpeg compiled to WebAssembly. Convert MP4, WebM, MOV, MKV, AVI and more to MP4 (H.264), WebM (VP9), animated GIF, or extract the audio to MP3.
Compress by adjusting the CRF, resize with a maximum width, change the GIF frame rate, and mute the audio — all without uploading a single byte to a server. The ~30 MB FFmpeg engine is downloaded lazily the first time you convert and then cached by your browser.
Because it is fully client-side, very large videos are limited by your device's memory and CPU.
Verwendung
Add a video
Drag in an MP4, WebM, MOV, MKV or AVI file.
Pick a format & options
Choose MP4, WebM, GIF or MP3 and tune quality, size and audio.
Convert and download
The first run loads the FFmpeg engine, then converts and lets you download the result.
Anwendungsfälle
Web-friendly video
Convert MOV/MKV recordings to MP4 or WebM for the web.
Short clips to GIF
Turn a moment of a video into an animated GIF.
Audio extraction
Pull the audio track out of a video as an MP3.
Häufig gestellte Fragen
Is anything uploaded?
No. Conversion runs in your browser via WebAssembly; your video never leaves your device.
Why is the first conversion slow to start?
The FFmpeg engine (~30 MB) is downloaded on first use and then cached, so subsequent conversions start instantly.
What formats can it output?
MP4 (H.264 + AAC), WebM (VP9 + Opus), animated GIF, and MP3 audio.
Are there size limits?
No server limit — but it is client-side, so very large files are bounded by your device memory/CPU.