Quick answer: To convert MP3 to WAV, add the file (up to 30 MB), choose the sample rate and click Convert. A CD-quality stereo WAV is about 10.6 MB per minute. The WAV will not sound better than the MP3; it is only a different, uncompressed format. Nothing is uploaded.
How to use the MP3 to WAV Converter
- Add your MP3 file (up to 30 MB).
- Choose the sample rate and whether you want stereo or mono.
- Click Convert and download the WAV when it is ready.
About MP3 to WAV conversion
An MP3 is compressed audio. A WAV file usually holds the same sound as uncompressed PCM data, which many audio editors, video editors, hardware samplers, phone systems and CD burning programs handle more easily. Converting simply decodes the MP3 into a WAV. It does not bring back detail that MP3 compression removed, so the WAV will sound the same as the MP3, only in a much bigger file.
When a WAV file is useful
- Editing. Many editors work faster with WAV and avoid saving a second round of lossy compression while you edit.
- CD burning. Audio CDs use 44.1 kHz, 16-bit stereo, which is the default setting here.
- Equipment that rejects MP3. Some samplers, game engines, telephone systems and older devices need WAV.
- Speech tools. Some voice and transcription tools prefer WAV, often mono at 16 kHz.
How big will the WAV be?
WAV size depends on the sample rate and channels, not on how large the MP3 was. These are approximate sizes for 16-bit audio:
| Setting | Best for | Approx. size per minute |
|---|---|---|
| 48 kHz stereo | Video projects | 11.5 MB |
| 44.1 kHz stereo | CD quality (default) | 10.6 MB |
| 44.1 kHz mono or 22.05 kHz stereo | Smaller files | 5.3 MB |
| 16 kHz mono | Speech tools | 1.9 MB |
Why the limit is 30 MB here
A WAV file is roughly ten times larger than the MP3 it came from, and your browser has to hold both in memory while converting. To keep the tool reliable, this page accepts MP3 files up to 30 MB. That is about 30 minutes of 128 kbps audio, which becomes a WAV of roughly 330 MB. For longer audio, cut it into parts with the MP3 Cutter and convert each part.
Private by design
The conversion runs inside your browser. Your audio file is not uploaded to FormatVolt or any other server. The first time you convert, your browser downloads the converter engine (about 30 MB). It is then stored in your browser cache, so later conversions start faster. Conversion speed depends on your device and the length of the file. Keep the tab open until the conversion finishes.
Frequently asked questions
How do I convert MP3 to WAV?
Add your MP3 file, choose the sample rate and channels, click Convert, then download the WAV.
Will the WAV sound better than the MP3?
No. The WAV is decoded from the MP3, so it sounds the same. It only changes the file format and makes the file much larger.
How large will the WAV be?
At 44.1 kHz stereo, about 10.6 MB per minute, whatever the size of the MP3. Mono or a lower sample rate makes it smaller.
Why is the limit 30 MB on this page?
WAV files are very large and the conversion happens in your browser memory. A 30 MB limit keeps the tool reliable on most devices.
Does the WAV keep the tags and cover art?
No. The WAV contains the audio only.
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Last updated: November 10, 2026