About this tool
Audio editors, samplers, phone systems, and some hardware only accept WAV. Converting produces an uncompressed 16-bit PCM file at the original sample rate that any of them will load. It cannot restore detail the MP3 lost, but it prevents further loss during editing.
About the formats: MP3 is the universal lossy audio format. Practically every device, car stereo, and app made in the last 25 years plays it, and at 192-320 kbps it is indistinguishable from the original for most listeners. WAV stores uncompressed PCM audio: perfect quality, but around 10 MB per minute. It is the format audio editors, samplers, and studios expect.
Everything happens inside your browser. Your file is never uploaded to a server: the conversion runs on your own device using WebAssembly, and the result is downloaded straight from memory. Close the tab and nothing is left behind.
How to use it
- Drop your MP3 files into the box above, or click to browse. Nothing is uploaded.
- Click Convert to WAV and wait a moment.
- Download the results individually or all at once as a ZIP.
Frequently asked questions
Does MP3 to WAV improve the sound?
No. It decodes the MP3 exactly as a player would and stores those samples uncompressed. Quality is identical to playback.
Why is the WAV so large?
WAV is uncompressed: about 10 MB per minute of stereo audio at 44.1 kHz.
Is this really free?
Yes. The site is supported by ads, and there are no limits on how many files you convert.
Are my files uploaded anywhere?
No. The converter runs entirely in your browser. Files stay on your device, which also makes it faster than upload-based converters for anything larger than a few megabytes.
Is there a file size limit?
The only limit is your device's memory. Images and audio of any normal size are fine; for video, files under about 500 MB work well on most laptops and phones.
Which browsers are supported?
Current versions of Chrome, Edge, Firefox, and Safari on desktop and mobile. Very old browsers without WebAssembly support will not work.