What bitrate should I choose?

128-192 kbps is a good balance for speech and most music; 320 kbps is closer to source quality (and the largest file); 96 kbps is smallest but noticeably lossy for music.

How is the MP3 encoded?

With a pure-JavaScript LAME encoder port that runs entirely in your browser — no WebAssembly, no server, no upload.

Does this tool upload my audio anywhere?

No — decoding and MP3 encoding both happen locally in your browser.

Convert Audio to MP3

Convert WAV or any browser-playable audio file to MP3, with a chosen bitrate.

Choose an audio file

Files never leave your device — this runs entirely in your browser. Output is MP3.

Related tools

Trim Audio
Audio Fade In / Fade Out
Audio Volume Adjuster
Mono ↔ Stereo Converter

How it works

1
Choose an audio file

WAV, AAC, OGG, FLAC or any format your browser can play. Up to 100 MB.
2
Pick a bitrate

96-320 kbps — higher means better quality and a larger file.
3
Download the MP3

Encoded entirely in your browser, no upload.

FAQ

What bitrate should I choose?: 128-192 kbps is a good balance for speech and most music; 320 kbps is closer to source quality (and the largest file); 96 kbps is smallest but noticeably lossy for music.
How is the MP3 encoded?: With a pure-JavaScript LAME encoder port that runs entirely in your browser — no WebAssembly, no server, no upload.
Does this tool upload my audio anywhere?: No — decoding and MP3 encoding both happen locally in your browser.