How the video-to-MP3 extraction works
When you drop a video file into the tool, it loads a WebAssembly build of FFmpeg directly in your browser tab. FFmpeg is the same open-source engine used by professional video editors, media players, and streaming platforms to handle media conversion.
The tool reads the video container format (MP4, MKV, AVI, etc.), locates the audio stream inside it, and re-encodes that stream as a standalone MP3 file at 192kbps with a 44.1kHz sample rate. The video frames are discarded entirely — only the sound track is preserved.
Common use cases
- Saving the audio from a screen recording or lecture video
- Extracting background music from a personal video clip
- Creating podcast episodes from recorded video interviews
- Pulling voiceovers from presentation recordings
Privacy and performance
Because the conversion happens entirely within your browser's memory, your video file is never transmitted over the internet. Processing speed depends on your device — a typical 100MB video file converts in under 30 seconds on a modern laptop.
The one thing that does travel over the network is the FFmpeg engine itself, a ~32MB WebAssembly binary served from this site on your first conversion. Your browser caches it, so later conversions need no network access at all. Your media never leaves your device at any point.
There are no accounts to create, no file limits beyond the 500MB per-file maximum, and no watermarks on your output. The tool works on any modern browser including Chrome, Firefox, Edge, and Safari.