WAV to MP3 Online
Shrink an Uncompressed Audio File
Need to use WAV to MP3 Online right now?
Since this converts from a lossless source, you get the cleanest possible MP3 encode available.
Drop an audio file, or click to browse
Processed locally in your browser — never uploaded
Compresses an uncompressed WAV file down to MP3, shrinking file size dramatically for sharing or storage.
Features
- Runs entirely in your browser
- Privacy-first — your data is never uploaded
- Real-time, instant results
- 100% free, no sign-up required
- Works on desktop, tablet, and mobile
- No installation needed
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About WAV to MP3 Online
WAV files are uncompressed and correspondingly large — often five to ten times the size of an equivalent MP3 for the same audio. When a WAV file needs to be shared, emailed, or stored more compactly rather than kept for further lossless editing, converting to MP3 shrinks it dramatically while keeping audio quality high at typical settings.
A real FFmpeg build compiled to WebAssembly handles the encoding entirely inside your browser, decoding the WAV's uncompressed PCM samples and encoding them as MP3 at a high VBR quality setting (quality level 2) — a strong balance of size reduction and audio fidelity for general use.
Since this converts from a lossless source, the resulting MP3's quality is limited only by the MP3 encoding itself, not by any prior compression the WAV might have carried — you're getting the cleanest possible MP3 encode available from that source audio.
This is the natural finishing step after lossless editing: work with uncompressed WAV throughout an editing process for maximum quality, then convert the final result to MP3 for sharing or distribution once editing is complete.
How it works
- Upload your WAV file. The file loads into the browser-based FFmpeg engine.
- Conversion runs locally. The uncompressed audio is encoded as MP3.
- Download the MP3. A dramatically smaller file, ready to share.
Examples
Shrinking a WAV file for sharing
Input
large uncompressed WAV recording
Output
a much smaller MP3, high audio quality preserved