01 / Drop
Choose the WAV file
Drag it in or click to pick it. It is read from your own disk.
Free tool
Shrink a large WAV into an MP3 that is easy to email, upload or play anywhere. Pick the quality from 128 to 320 kbps. It runs in your browser, so nothing is uploaded.
This runs in your browser. Your files are never uploaded.
How it works
01 / Drop
Drag it in or click to pick it. It is read from your own disk.
02 / Convert
Press convert. Pick the MP3 quality first if you like. It runs in the page.
03 / Save
Play the result in the page, then download it.
Questions
No. It is converted in this tab with your browser, so the file never leaves your computer. MP3 files are made with a WebAssembly build of the LAME MP3 encoder.
WAV is uncompressed sound. It keeps every detail, so files are large: about 10 MB a minute for CD-quality stereo. Editors such as GarageBand and Logic work with it.
MP3 is compressed sound that plays on almost every phone, car stereo, player and website.
MP3 leaves out detail most people cannot hear, so the file becomes many times smaller. Pick 256 or 320 kbps to keep the most.
The file is handled in your browser's memory, so very large files can fail. Close other tabs and try again.
Current Chrome, Edge, Safari and Firefox.