WAV to MP3
Convert WAV recordings to compact MP3 files at the bitrate you choose; everything happens in your browser.
- Runs in your browser
- Free to use
About this tool
WAV is perfect for editing and useless for sharing: ten minutes weigh a hundred megabytes. The WAV to MP3 converter decodes the files with the Web Audio API and encodes them with the LAME MP3 encoder running in your browser, at the bitrate you pick, so recordings, exports and voice notes become small, universally playable files without ever leaving your device.
Related: MP3 to WAV, Audio Volume Boost.
How to use it — quick steps
- 01
Add the WAV files
Drop the files on the dashed area or choose them from your device, up to 25 files of 50 MB each per run.
- 02
Choose the bitrate
192 kbps is transparent for most music and speech; 320 for archiving, 128 for voice notes and podcasts.
- 03
Press "Convert to MP3"
Each file is decoded and encoded with LAME in your browser; play the result and download it.
Key features of this tool
Real LAME encoder
The same MP3 encoder used by desktop tools, running in the browser, at 128-320 kbps constant bitrate.
Batch of 25
Convert a whole folder of recordings in one go, each with its own player and download link.
Processed on your device
Decoding, processing and encoding run in your browser with the Web Audio API; audio files are never uploaded.
Frequently asked questions
Which bitrate should I use?
128 kbps for speech, 192 kbps for music with no audible loss for most listeners, 320 kbps when size does not matter.
Why is conversion slow on long files?
MP3 encoding is CPU-heavy and runs in your browser; a 10-minute track takes a few seconds on a laptop, longer on phones.
Is stereo kept?
Yes, up to two channels; multichannel WAV files are downmixed to stereo.
Are my files or data uploaded?
No. The tool is plain JavaScript that runs in your browser; the files or data you provide here are never uploaded to our servers.