01
Select your file
MP3, WAV, FLAC, OGG, M4A, AAC, WMA, AIFF, or video files.
02
Convert instantly
WebAssembly processes everything on your machine. Nothing leaves your device.
03
Download
Your converted file is ready. No email gate, no signup wall.
Files never uploaded
Everything runs locally. Nothing touches our servers.
Runs in your browser
FFmpeg compiled to WebAssembly. No install, no plugin.
54 converters
Every major audio format and video-to-audio extraction.
Works everywhere
Mac, Windows, iPhone, Android, Linux — any modern browser.
All converters
54 tools across every major audio format.
MP3 Conversions
The universal format
Lossless
WAV, FLAC, AIFF
Video to Audio
Extract audio from video files
More Formats
OGG, Opus, AAC, WMA, M4A
Browse by format
All converters organised by format — every direction in one place.
More audio tools
Cut, join, compress, speed-adjust, and normalise — all in your browser.
Best for
Private local conversion matters most when your files are sensitive.
Podcasters
Convert between WAV (editing) and MP3 (publishing) without uploading raw episode drafts to a third-party server.
Voice memos
Turn iPhone Voice Memos from M4A into MP3 for sharing, transcription, or uploading to any service.
Music production
Export stems and masters as WAV or FLAC for your DAW, then generate a compressed MP3 for sharing — all offline.
Video to audio
Extract audio tracks from MOV and MP4 screen recordings, interviews, or clips in seconds.
Compatibility fixes
M4A files that won't play on Android or Windows, WMA files locked to old devices — convert once, done.
Why not just use a regular online converter?
Most converters work by uploading your file to their server, processing it, and sending it back. That means your audio — voice memos, interview recordings, unreleased music, podcast drafts — passes through infrastructure you don't control and may be stored, logged, or analyzed.
Upload-based converters
- ✕File sent to a remote server
- ✕Upload time adds latency
- ✕Server-side storage risk
- ✕Queue-based — slower under load
- ✕Requires internet throughput for large files
AudioUtils
- ✓File stays on your device
- ✓Conversion starts immediately
- ✓Nothing stored on our servers
- ✓Runs at full CPU speed locally
- ✓Works offline once loaded
AudioUtils runs FFmpeg compiled to WebAssembly entirely in your browser. We support MP3, WAV, FLAC, OGG, M4A, AAC, WMA, AIFF, Opus, and video-to-audio extraction from MP4 and MOV. The free tier outputs a 10-second preview — Pro unlocks full-length conversions and higher file size limits.
Learn about audio formats
Guides and comparisons to help you pick the right format.