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.
Runs on your device. This tool processes your file inside this browser tab. Nothing is uploaded, so it also works offline once the page has loaded, and closing the tab discards the file from memory.
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 2026-08-12
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.