Convert WAV to MP3
Shrink a big WAV into a small MP3 that plays anywhere: phones, car stereos, browsers, and every DAW. The conversion runs in your browser, so nothing is uploaded.
Why convert WAV to MP3?
WAV is what you record and master with, but a single stereo track runs about 10 MB per minute, which is a lot to email, upload, or load onto a phone. MP3 is what the rest of the world plays back: car head units, old iPods and Android phones, web players, podcast apps, and any DAW you import it into. Convert to MP3 when you want to send a mix to a collaborator, post a demo, or drop a playlist on a device without filling the storage. It is the safe default when you have no idea what will be on the other end.
Quality and file size
This step re-encodes the audio with libmp3lame and throws away data to make the file small, so an MP3 is lossy by design. At 320 kbps that loss is inaudible to most listeners on most gear, and the file drops to roughly a tenth of the WAV. Lower bitrates like 128 kbps save more room but start to smear cymbals and reverb tails, so pick based on whether size or fidelity matters more for this particular file. Keep the original WAV as your master and treat the MP3 as a copy for sharing, since you cannot get the discarded detail back from it.
WAV to MP3: common questions
Does converting WAV to MP3 lose quality?
Yes. MP3 is lossy, so libmp3lame discards some data to shrink the file. At 320 kbps the loss is inaudible to most people, and the MP3 lands far smaller than the WAV.
Which bitrate should I choose for the MP3?
Use 320 kbps when quality matters and you can spare the size. Drop to 192 or 128 kbps only when a smaller file matters more than fidelity, for example a quick reference or a voice recording.
Is my WAV uploaded anywhere?
No. The conversion runs entirely in your browser using FFmpeg compiled to WebAssembly. Your WAV never leaves your device, and we never see it, store it, or train on it.
Will the MP3 play on my car stereo and phone?
Almost certainly. MP3 is the most universally compatible audio format, so it plays on essentially every phone, car head unit, browser, and media player made in the last two decades.
Who makes this?
We're the small team behind Xport Studio, a private, fully offline app for AI vocals, stems, and mastering. These free tools are side experiments we wanted to share. No upsell, but if you're curious about the bigger thing, take a look.