MP3 to WAV Converter
Your files never leave your device
Conversion runs inside your browser using WebAssembly. Nothing is uploaded; the only downloads are this page and the conversion engine. You can confirm it in your browser's network tab.
Why convert MP3 to WAV?
Some audio editors, samplers, DJ gear, phone systems and CD-burning tools need uncompressed WAV.
What changes in the WAV
- The file gets about 10× larger (around 10.6 MB per minute for CD-quality stereo).
- Quality does not improve: the WAV holds exactly what the MP3 decodes to.
- Output is 16-bit PCM at the MP3’s original sample rate and channel count.
How Convertz converts it
FFmpeg (WebAssembly) decodes the MP3 and writes 16-bit PCM WAV without resampling.
Everything happens on your device; the file is never uploaded.
Common pitfalls
- Phone systems and some hardware need a specific format (for example 8 kHz mono); this converter keeps the original sample rate, so check the device’s requirements.
- If you only need the audio in an editor that reads MP3, skip the conversion: the WAV is far larger and no better.
MP3 vs WAV
| Property | MP3 | WAV |
|---|---|---|
| Full name | MPEG-1 Audio Layer III | Waveform Audio File Format |
| Compression | Lossy | Uncompressed |
| Transparency | — | — |
| Works with | Every audio player, phone, car stereo and editing app. | All editing software, DAWs, samplers and CD-burning tools. |
What is MP3?
The universal compressed audio format, standardised in 1993. It removes sounds that are masked by louder ones; at 190 kbps or more most listeners can’t tell it from the original. Its patents expired in 2017.
What is WAV?
Microsoft and IBM’s 1991 audio container, almost always holding uncompressed PCM audio. CD-quality stereo (16-bit, 44.1 kHz) takes about 10.6 MB per minute, and a WAV file can’t exceed 4 GB (about 6¾ hours at CD quality).
Related conversions
The converter also handles 22 input formats in total. See all formats