Free audio converter
WAV to MP3 Converter
Turn a WAV file into a compact MP3 file directly in your browser, using the Web Audio API plus a pure-JavaScript MP3 encoder. Nothing is uploaded to a server.
Convert WAV to MP3
Drop a WAV file here, or click to choose a file
Processed locally in your browser — nothing is uploaded.
100% local — your file never leaves your device.
Frequently asked questions
Is this WAV to MP3 converter really free?
Yes, entirely free, with no account, watermark, or file limit imposed by a server — because there is no server involved.
Does my audio file get uploaded anywhere?
No. Decoding and MP3 encoding both happen locally in your browser tab. Your file never leaves your device.
Why convert WAV to MP3?
MP3 files are dramatically smaller than WAV, which makes them easier to email, upload, or store without losing much audible quality.
Doing this by hand every week? That's exactly what I remove.
If this conversion is one small step in a bigger workflow — say, files arriving by email, getting converted, renamed and filed by a person every time — I build software that does the whole thing automatically. My clients get back up to 18 hours a week this way.
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