Audio
Turn your MP3 files into WAV in seconds. Everything happens in your browser: nothing is uploaded to any server.
Drag your files here
Or paste them with Ctrl+V. They never leave your device.
It loses some quality with each re-encode and, at the same size, sounds worse than AAC or Opus. As WAV it stays uncompressed, ready to edit in any audio program.
MP3 compresses sound lossily, removing what the ear barely notices, so a song takes just a few megabytes.
Strengths: Any phone, car, speaker, player or program plays it, however old.
Limits: It loses some quality with each re-encode and, at the same size, sounds worse than AAC or Opus.
WAV stores sound as it is, uncompressed: every audio sample stays intact.
Strengths: It is the working format of audio editors and many professional devices.
Limits: It is huge: one minute at CD quality weighs about 10 MB.
No. The MP3 to WAV conversion runs entirely in your browser, with code downloaded from this site and executed on your device. You can check it in the Network tab of the developer tools or by going offline after the page loads.
No: WAV stores audio losslessly (any loss already in the MP3 cannot be recovered).
Up to 2 GB on desktop and 500 MB on mobile (less on low-memory devices), and up to 12 hours of audio on desktop. If it is over, you are told before it starts.
Yes. Drop as many MP3 files as you like: several are converted at the same time, depending on your processor cores, and when they finish you can download each WAV or all of them in a ZIP.