Audio Converter
Convert between MP3, WAV, OGG and M4A, entirely in your browser via ffmpeg.wasm.
Different devices, editors, and platforms expect different audio containers - WAV for uncompressed editing, MP3 for broad compatibility, OGG for open-source projects, M4A for Apple devices. This tool runs FFmpeg compiled to WebAssembly directly in your browser to re-encode between MP3, WAV, OGG, and M4A in either direction, with no upload and no size sent to a server. It's a general-purpose format swap; if you only need to pull audio out of a video file, use Video to Audio instead.
Loading tool
How it works
- 01
Drop or select your MP3, WAV, OGG, or M4A file.
- 02
Choose the target format.
- 03
Click Convert and download the result.
Details
- Category
- Audio
- Runs
- In your browser
- Files uploaded
- No
- Cost per run
- Free
- Sign-in
- Not required
- Works offline
- Yes, once loaded
Last updated 2026-08-03
Common questions
Which formats are supported?
MP3, WAV, OGG and M4A, both as source and target.
Does it upload my audio?
No - conversion runs locally with WebAssembly. Nothing leaves your browser.
Which format should I pick for the smallest file?
MP3 or OGG at a moderate bitrate give the smallest files. WAV is uncompressed and much larger, useful mainly for editing.
Is there a file size limit?
There's no hard server-side cap since everything runs client-side, but very large files are limited by your browser's available memory.