Free Video Converter Tools
Convert and compress video right in your browser — MP4, MOV, AVI, MKV, WebM — powered by FFmpeg compiled to WebAssembly. Nothing is uploaded.
Convert and compress video in your browser
Convert MP4, MOV, AVI, MKV, and WebM, or shrink a large clip down for email, messaging, or an upload limit — all without sending your footage to a server. The tools run FFmpeg compiled to WebAssembly, the same engine desktop apps use, right inside the page.
Fix videos that won't play
A .mov from an iPhone or a .mkv from a download often won't open in the app you need. MOV to MP4, MKV to MP4, AVI to MP4, and WebM to MP4 repackage the video into MP4 — the format that plays virtually everywhere, from social platforms to presentation software.
Extract audio and compress
Pull the soundtrack out of a video with MP4 to MP3 for a podcast clip or a music track, or use Compress Video to cut file size when a clip is too big to share. You choose the trade-off between size and quality.
Private, no-upload video conversion
Uploading video is slow and, for personal or unreleased footage, risky. Because conversion happens on your own machine, there's no upload wait and nothing leaves your device. Note the FFmpeg engine (~30 MB) downloads once on first use and is then cached, so later conversions start quickly.
Not sure which tool you need?
- iPhone video won't play on Windows or Android?MOV to MP4 →
- Video file too large to send or upload?Compress Video →
- Only need the audio track?MP4 to MP3 →