MP3 to WAV Converter

Convert MP3 audio to uncompressed WAV format for editing or archiving.

Drop your MP3 file here

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How to Convert MP3 to WAV

Add your MP3 file - Click the drop area or drag and drop the file you need in WAV form.
Preview it - Use the built-in player to confirm it is the right recording.
Convert - Click the button. The MP3 is decoded to raw PCM audio and written out as a standard WAV.
Download - Save the WAV. Expect it to be roughly ten times the size of the MP3.

Why Programs Keep Asking for WAV

WAV is the plainest way audio can exist on a computer: uncompressed PCM samples with a small header on top. That plainness is exactly why professional tools prefer it. An editor working on a WAV never has to decode anything, a CD burner can write it almost directly, and a hardware sampler can stream it without a codec. So even in a world where MP3 plays everywhere, workflows keep funneling through WAV: audio editing sessions, CD masters, soundboard and sampler imports, broadcast submissions, and transcription systems with strict input rules.

What This Conversion Does and Does Not Change

Question	Answer
Accepted by editors, burners, and samplers?	Yes - this is the point of converting
Safe to edit and re-save repeatedly?	Yes - WAV saves are lossless, no generational decay
Restores detail the MP3 encoder removed?	No - that information was discarded for good
Sounds better than the source MP3?	No - it sounds identical, in a bigger file
File size	Around 10x larger, about 10.6 MB per minute of stereo audio

The honest framing: this is a compatibility conversion, not a quality upgrade. A 128 kbps MP3 dressed up as a WAV is still a 128 kbps recording underneath. What you gain is a file that every serious audio tool will accept without complaint, and one you can edit as many times as you like without losing anything further.

The Size Math

Uncompressed CD-quality stereo runs at 1,411 kbps, which works out to about 10.6 MB per minute. A 4 minute track lands near 42 MB, a half hour interview near 320 MB. If the WAV is an intermediate step for editing, this is fine; work on it, then export your finished version back to MP3 with our WAV to MP3 converter when it is time to share.

Frequently Asked Questions

Will converting MP3 to WAV improve the sound quality? No, and it is worth being direct about this because the myth is widespread. The detail an MP3 encoder discards is gone permanently. Converting to WAV re-packages the surviving audio in an uncompressed container; the file gets roughly ten times larger while sounding exactly the same as the source MP3.

If quality does not improve, why convert at all? Because plenty of software and hardware simply requires WAV as an input. Audio editors work more reliably with uncompressed sources, CD burning expects PCM audio, some samplers and soundboards only load WAV, and certain court, broadcast, and transcription systems reject compressed formats regardless of how they sound.

What sample rate and bit depth does the output use? The WAV preserves the sample rate of your source MP3, which is almost always 44.1 kHz for music or 48 kHz for audio that came from video, and writes standard 16-bit PCM. That combination is what CD audio uses and what virtually every editor and burner expects.

How much bigger will my file get? Expect roughly a tenfold increase. A 4 minute song that is 4 MB as a 128 kbps MP3 becomes about 42 MB as a stereo 44.1 kHz WAV. The math is fixed: uncompressed stereo CD-quality audio always costs about 10.6 MB per minute, no matter how small the MP3 was.

Is the conversion done on a server? No server is involved. Your browser decodes the MP3 with the Web Audio API and writes the WAV file locally, so the audio never travels over the network. Large files are limited only by your device memory, not by any upload cap.

Should I edit the WAV or the original MP3? Edit the WAV. Every time an MP3 is opened, edited, and saved as MP3 again, it passes through the lossy encoder and loses a little more detail. Editing the WAV and exporting once at the end means the audio only goes through compression a single additional time.