Audio Converter
Convert audio between MP3, AAC, OGG, OPUS, FLAC, and WAV — or extract audio from a video file.
Your computer does 100% of the processing — not a server, not the cloud.
FFmpeg runs directly inside your browser via WebAssembly. Your audio files never leave your device. No upload, no cloud service — your own CPU handles everything.
- ✓Files stay on your computer — zero upload, zero cloud
- ✓Completely private — no account, no logging of your files
- ⚠First use downloads ~32 MB FFmpeg engine — cached after that
Drop an audio file here or browse files
MP3 · WAV · AAC · M4A · OGG · FLAC · OPUS · and more
Also accepts video files — audio track will be extracted
Free Online Audio Converter — 100% Local, No Upload
This converter uses FFmpeg compiled to WebAssembly, running entirely in your browser. Your audio files never leave your device.
Frequently asked
Can I extract audio from a video? Yes — drop any MP4, MOV, MKV, or WebM and choose an audio format.
Is my audio private? Yes. Audio is read into browser memory, processed by FFmpeg in WebAssembly, and saved back to disk. No network connection involved.