Convert MP3 to Uncompressed WAV, Free
Convert an MP3 to an uncompressed WAV file, in your browser.
Select an audio file
Your MP3 is decoded and written out as an uncompressed 16-bit WAV — in your browser, never uploaded.
Click to choose, or drop a file here
You can also paste (Ctrl+V / Cmd+V)
Most tools run entirely on your device
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About converting MP3 to WAV
WAV is an uncompressed audio format some editing software and older hardware specifically want, while MP3 is compressed for smaller file size — converting from MP3 to WAV doesn't recover any quality lost in the original MP3 encoding, but it does put the audio in the format those tools expect.
The MP3 is decoded to raw audio samples with the Web Audio API and re-encoded as uncompressed WAV, entirely in your browser. The file will be significantly larger than the source MP3, since WAV doesn't compress the audio data.
Supported files
Accepts MP3 files. Produces a .wav file.
Is my file uploaded?
No. Decoding and re-encoding both happen entirely in your browser with the Web Audio API — the file is never uploaded.
How to MP3 to WAV
- 1
Add the MP3
Drop in your MP3 — it's decoded on your device.
- 2
Convert
It's written out as an uncompressed 16-bit WAV.
- 3
Download the WAV
Save the converted file.
MP3 to WAV — frequently asked questions
Why is the WAV so much bigger?+
WAV is uncompressed PCM — roughly 10× an MP3. That's expected: it's the trade-off for a lossless, editing-friendly file.
Does converting to WAV improve quality?+
No. It can't restore detail the MP3 already discarded — but it won't lose any more, which is useful before further editing.
Is it uploaded?+
No — the MP3 is decoded and the WAV is written entirely in your browser.
What sample rate is the WAV?+
The same sample rate as the source MP3, as 16-bit PCM.
Do you upload my files to a server?+
No — every tool here processes your files entirely on your device, and nothing is uploaded to a server. The only exception is the AI tools, which send the extracted text (not the file) to Claude to do their work.
Is there a file size limit?+
There's no artificial limit we impose, but since processing happens in your browser, very large files (500+ MB or 1,000+ pages) are limited by your device's memory rather than by us.
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