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MP3WAV

Convert MP3 to WAV

This free MP3 to WAV converter changes your MPEG-1 Audio Layer III (.mp3) file into a Waveform Audio (.wav) file, right in your browser. There is nothing to install, no account to create, and no limit on how many files you convert.

100% private. Your file is processed locally in your browser with WebAssembly — it is never uploaded to a server, stored, or seen by anyone.

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The conversion runs on your own device using ffmpeg compiled to WebAssembly (ffmpeg.wasm), so your file is never uploaded to a server. WAV is best for uncompressed editing and mastering, which is the usual reason to convert from MP3.

Why convert MP3 to WAV?

  • MP3 and WAV are similarly compatible, so you are mainly changing the container.
  • WAV is lossless and larger, but converting from MP3 cannot restore quality that MP3 already discarded.
  • Pick WAV when you need a file made for uncompressed editing and mastering.

MP3 vs WAV

PropertyMP3WAV
Full nameMPEG-1 Audio Layer IIIWaveform Audio
ContainerMP3WAV
Typical codecMP3PCM
CompatibilityUniversalUniversal
LosslessNoYes
Best forUniversal music and podcast playbackUncompressed editing and mastering

How to convert MP3 to WAV

  1. Add your MP3 file

    Drag and drop your .mp3 file onto the upload area, or click to browse and pick it from your device.

  2. Start the conversion

    Click "Convert to WAV". Everything runs locally with ffmpeg compiled to WebAssembly (ffmpeg.wasm) - your file stays on your device.

  3. Wait a few seconds

    A progress bar shows the conversion. The first run is slightly slower while the engine loads, then it is cached.

  4. Download your WAV file

    When it finishes, download the .wav file straight to your device.

Frequently asked questions

Is this MP3 to WAV converter free?
Yes. It is completely free with no signup, no watermark, and no limit on how many files you convert. It is supported by ads, which keeps the conversion itself free.
Are my files uploaded to a server?
No. The conversion runs locally in your browser using ffmpeg compiled to WebAssembly (ffmpeg.wasm), so your file is processed in memory on your own device and is never uploaded, stored, or seen by anyone.
Will I lose quality converting MP3 to WAV?
WAV is lossless, but the source is decoded and re-encoded, so the result can only match - not exceed - the quality already in your MP3 file.
Will the file get smaller or larger?
Larger. WAV is lossless, so the file grows compared with MP3 - though it cannot recover quality MP3 already lost.
What is the difference between MP3 and WAV?
MP3 is MPEG-1 Audio Layer III (an MP3 container, typically MP3); WAV is Waveform Audio (a WAV container, typically PCM). WAV is best for uncompressed editing and mastering, while MP3 is best for universal music and podcast playback.
How long does the conversion take?
Most files finish in a few seconds to under a minute, depending on length and your device. The first conversion is a little slower while the engine downloads and caches, then later runs start instantly.

Related conversions

M4A → WAVFLAC → WAVMP3 → M4AMP3 → AACMP3 → OGG

Need more formats or options? Use the full Audio Converter.