Updated June 2026 · runs 100% in your browser
WAV to MP3
Compress lossless WAV audio into small, universal MP3s on your device. No upload, no sign-up, no limits.
Drop WAV files here
or click to choose
🔒 Converted on your device · 0 bytes uploaded
First file loads the converter engine (~25 MB) — cached after that.
How it works
ConvertCabin loads a local copy of FFmpeg in this browser tab and converts on your device — nothing is uploaded. The first file downloads the engine (~25 MB), which your browser caches.
It stays free, unlimited and private, and works offline once loaded.
About WAV and MP3
WAV is uncompressed and large; MP3 is compressed and plays everywhere. Converting trades a little fidelity for a far smaller file that's easy to share.
Frequently asked questions
How do I convert WAV to MP3?
Drop your WAV files, wait for the engine to load on the first file, and download the MP3s.
Will it lose quality?
MP3 is lossy, but at standard quality the difference is hard to hear while the file is much smaller.
Is my audio uploaded?
No. It is converted on your device by a local copy of FFmpeg.
What is a WAV file?
WAV is an uncompressed, lossless audio format that stores raw, studio-quality sound. Files are large, so WAV is used mainly for editing and archiving rather than everyday sharing.
What is an MP3 file?
MP3 is the most widely supported audio format. Its lossy compression shrinks audio to a fraction of the original size while keeping it perfectly listenable, which is why it became the standard for music.