Browser edition: files stay on your device. Up to 100 MB total and 10 minutes. First use downloads a 32 MB engine. Some formats depend on codec support. Public-link downloading is not ready on this free deployment.
Convert MP3 to WAV
Convert MP3 to WAV online for free. Real conversion, batch support, no sign-up.
How to convert MP3 to WAV
- Add your fileDrop it on the page, choose it from your device, or paste it with Ctrl+V.
- ConvertAdjust settings if you like, then press the button. You'll see live progress.
- Browser processing uses original files on your device. Public-link downloading is unavailable.
What happens to your file
MP3 files are common for music libraries, podcasts, car stereos, any device, but not every app or device opens them. WAV is ideal for audio editing, recording, sound effects, mastering. Spool converts MP3 to WAV with FFmpeg — real decoding and encoding, not a renamed file extension.
No quality is added. WAV is uncompressed or lossless, so the result is larger than your MP3, but the detail removed when the MP3 was created can't be restored. Convert to WAV when an editor, DAW or device requires it.
Converting MP3 to WAV does not bring back detail removed by MP3 compression, but it gives you an uncompressed file that every DAW, audio editor, sampler and broadcast system accepts.
Settings
- Sample rate — Original, 48 kHz, 44.1 kHz, 22 kHz
- Channels — Original, Mono
MP3 vs WAV
| MP3 | WAV | |
|---|---|---|
| Full name | MPEG-1 Audio Layer III | Waveform Audio File Format |
| Created by | Fraunhofer IIS / MPEG, 1993 | Microsoft & IBM, 1991 |
| Type | Lossy audio | Lossless audio |
| Typical contents | MP3 (lossy) | uncompressed PCM |
| Best for | music libraries, podcasts, car stereos, any device | audio editing, recording, sound effects, mastering |
| Strength | Universal compatibility | Lossless and uncompressed — no quality loss |
| Weakness | Lossy: some detail is discarded | Very large: about 10 MB per minute of stereo audio |
About MP3
- Type
- MPEG-1 Audio Layer III
- Contains
- MP3 (lossy)
- Use
- music libraries, podcasts, car stereos, any device
About WAV
- Type
- Waveform Audio File Format
- Contains
- uncompressed PCM
- Use
- audio editing, recording, sound effects, mastering
FAQ
What bitrate should I choose for WAV?
WAV is lossless, so there is no bitrate to choose — you can only change the sample rate or switch to mono.
Can I convert several MP3 files at once?
Yes. Drop up to 10 files at a time — each one is converted in parallel and you can download them individually or all at once.
Is there a file size limit?
Convert and edit files on your device. The browser edition accepts up to 100 MB total, media up to 10 minutes and video up to 4K. Codec availability and device memory can limit individual jobs.
Is this MP3 to WAV converter free and safe?
Yes. There are no pop-ups, redirects or fake download buttons, and no software to install. Files are transferred over HTTPS, processed in isolated job folders and deleted automatically.