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Convert MP3 to WAV

Turn your MP3 files into WAV — free, fast and right in your browser.

Runs locally — nothing is uploaded

Drop MP3 files here — or click to browse

Files are converted in your browser and never uploaded.

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This tool converts MP3 files to WAV right in your browser. Drop the file, pick a bitrate, download — the recording is decoded and re-encoded on your device and never uploaded anywhere. The result is a finished WAV file, no watermark and no signup.

What is MP3?

MP3 (MPEG-1/2 Audio Layer III) is the lossy audio format that made digital music portable. It was standardised in 1993 as part of ISO/IEC 11172-3 and plays on practically every phone, browser, car radio and cheap MP3 stick of the last 25 years. At the common 192 kbit/s one minute of stereo audio needs about 1.44 MB. Its last patents ran out in 2017, when Fraunhofer IIS ended the mp3 licensing programme — which is why free MP3 encoders are everywhere today.

What is WAV?

WAV is the RIFF container Microsoft and IBM specified in 1991, and it normally holds completely uncompressed PCM audio — exactly the samples an editor, a CD or a sampler expects. CD quality (44.1 kHz, 16 bit, stereo) means 1,411 kbit/s, roughly 10.6 MB per minute. Nothing is thrown away, but RIFF stores its sizes in 32-bit fields, so a classic WAV file cannot exceed 4 GiB — about 6.7 hours of stereo.

Why convert MP3 to WAV?

Editing suites, samplers, DJ software and some phone systems want uncompressed PCM instead of MP3. This conversion puts the decoded signal unchanged into a WAV container — ideal as an intermediate format before you keep working on it.

How much bigger does the file get?

The file gets much bigger, not better: 1.44 MB per minute (MP3 at 192 kbit/s) become 10.6 MB per minute (44.1 kHz, 16 bit, stereo) — roughly seven times the space. The sound stays exactly what the MP3 decoder produces.

What are the limits?

A WAV made from an MP3 is not a lossless original. Whatever MP3 compression removed is gone and converting does not bring it back; the only gain is being able to work on without compressing again. And a hard format limit: RIFF stores its sizes in 32-bit fields, so a classic WAV file stops at 4 GiB — about 6.7 hours of CD-quality stereo.

How to convert

1. Drop your MP3 file(s) into the area or click to browse. 2. The target format WAV is fixed; for MP3 you also pick the bitrate (128, 192 or 320 kbit/s). 3. Click Convert and download the file — multiple files come as a ZIP.

Frequently asked questions

Is converting MP3 to WAV free?

Yes, completely free and without signup. There are no watermarks and no file-size limits beyond what your browser can handle.

Are my files uploaded?

No. The conversion runs entirely in your browser — your MP3 file never leaves your device and is not sent to any server.

Does the file sound better as WAV than as MP3?

No. WAV stores exactly the signal the MP3 decoder produces — the parts removed during compression do not come back. The file just gets about seven times bigger. The step makes sense when a program needs uncompressed PCM.

Can I convert several files at once?

Yes. Just drop multiple files into the area — they are converted together and you can download them as a ZIP.

How long may my file be?

Up to about 30 minutes. For converting, the audio has to be fully decoded in memory — one stereo minute at 44.1 kHz takes roughly 21 MB there, so 30 minutes is already about 635 MB. Split longer recordings first.

Are title, artist and cover art preserved?

No. The file is decoded to raw audio and written anew, which drops ID3 tags and embedded cover art. Add the details afterwards in your player or a tag editor.