WAV to MP3 Converter
Shrink an uncompressed WAV recording into a small, shareable MP3, free and entirely in your browser.
What is WAV?
WAV is an uncompressed audio format — what microphones, DAWs, and voice recorders typically save by default. A few minutes of stereo WAV audio can easily run 30–50 MB, since it stores every sample with zero compression.
Why convert WAV to MP3?
MP3 compresses that same audio down to a fraction of the size (often 90% smaller) with minimal audible quality loss at 192–320 kbps, making it the practical choice for emailing, uploading, or storing recordings that don’t need studio-master fidelity. Converting WAV to MP3 is the standard last step before distributing a recording.
How to convert WAV to MP3
- Drop your WAV file. Drag and drop a WAV file, or click to browse. First use loads the ffmpeg.wasm engine (~31 MB, cached in your browser after).
- Confirm output is MP3. This page pre-selects MP3 as the output format — change it in the format picker if you’d rather export something else.
- Set quality and convert. Pick a quality or bitrate preset, then click Convert. Processing runs locally on your device and typically finishes in well under a minute for short files.
- Download. Click Download to save your MP3 file. Nothing was ever uploaded to a server.
Your file never leaves your browser — conversion runs locally via ffmpeg.wasm, not on a server.
Use Cases
- Shrink a voice memo or podcast raw recording for email/upload
- Convert a WAV export from a DAW into a shareable MP3 demo
- Reduce storage space for a large batch of WAV recordings