Why convert MP3 to WAV?
MP3 is great for listening, but plenty of software and hardware still wants WAV. Some older samplers, CDJs, broadcast systems and game engines only accept PCM audio. Video editors handle WAV more predictably on the timeline. And some audio tools decode MP3 with a small offset at the start, which can knock a loop or sync point slightly out.
When you change MP3 to WAV, you get a file that every audio tool reads the same way. That is the main reason to do it.
- Importing into a DAW such as Ableton Live, FL Studio, Logic or Reaper without extra decoding.
- Loading tracks onto hardware samplers, older CDJs or broadcast playout systems that expect WAV.
- Burning an audio CD, which stores 16-bit / 44.1 kHz PCM anyway.
- Sending a file to a client or platform whose spec says "WAV only".
MP3 and WAV explained
MP3 (MPEG-1 Audio Layer III) was developed mainly at the Fraunhofer Institute in Germany and standardised in 1993. It is a lossy codec: it discards sounds that the ear is less likely to notice. Typical bitrates run from 128 kbps to 320 kbps, usually at 44.1 kHz.
WAV is a container created by Microsoft and IBM in 1991. It almost always holds uncompressed PCM audio. A 16-bit, 44.1 kHz stereo WAV uses 1,411 kbps, which is roughly ten times the data of a 128 kbps MP3.
| MP3 | WAV | |
|---|---|---|
| Compression | Lossy (perceptual coding) | None (PCM) |
| Quality | Very good at 256 to 320 kbps, audible artefacts at low bitrates | Exact copy of the samples it holds |
| Typical size per minute | 0.96 MB at 128 kbps, 2.4 MB at 320 kbps | 10.1 MB at 16-bit / 44.1 kHz |
| Compatibility | Plays almost everywhere | Plays almost everywhere, preferred by pro tools |
| Best for | Listening, sharing, streaming | Editing, mastering, hardware, archiving a working copy |
Does converting MP3 to WAV improve quality?
No, and it is worth being clear about this. The MP3 encoder already threw away detail when the file was made. Converting MP3 to WAV unpacks what is left into an uncompressed file, so the WAV sounds exactly like the MP3. It will be around four to ten times bigger, but no richer.
What you do gain is stability. From here on, any edits, exports or effects you apply to the WAV will not add another round of MP3 compression. If you plan to edit the audio and export it again, working from a WAV is the right move.
If you have access to the original lossless master, use that instead. No converter can rebuild frequencies an MP3 removed.
Settings for MP3 to WAV
There is nothing to tune, which is the point. AudioDrop writes 16-bit PCM WAV and keeps the MP3's sample rate, which is usually 44.1 kHz or 48 kHz. Keeping the original rate avoids resampling, so the WAV matches the MP3 sample for sample.
16-bit is the right depth here. An MP3 does not contain more detail than 16-bit can hold, so a 24-bit or 32-bit WAV would only be larger. If your project runs at a different sample rate, let your DAW handle the conversion when you import.
An MP3 to WAV converter that works offline
This MP3 to WAV converter runs entirely in your browser. The MP3 is decoded with WebCodecs and written out as WAV in memory, then saved to your device. No file is uploaded, so there is nothing to wait for and nothing stored on a server.
- Private by design: your MP3 files never leave your computer or phone.
- Works offline once the page has loaded.
- Batch conversion: drop dozens of MP3s and they convert in parallel, each downloading on its own.
- No fixed file size cap, only the limits of your device's memory.
Convert MP3 to WAV on Mac, Windows, iPhone and Android
Because it is a web page, the steps are the same everywhere. On Mac or Windows, open this page in Chrome, Edge, Safari or Firefox and drag your MP3s in. On iPhone, open it in Safari, tap to choose files from the Files app, and the WAV lands in your Downloads folder. On Android, use Chrome and pick files from your storage.
A phone can convert MP3 to WAV without trouble, but keep an eye on space. An hour of 16-bit stereo WAV takes about 600 MB.