Convert MP3 to WAV online
Convert a MP3 file to WAV directly in your browser — the file is never uploaded to a server.
or click to select it
Convert an MP3 file into an uncompressed WAV file, the format many audio editors, DAWs and older devices expect instead of a compressed file.
Decodes the compressed MP3 audio and writes the samples back out as uncompressed PCM inside a WAV container. It's a repackaging step, not a restoration: it doesn't recreate the audio detail the original MP3 encoding removed, it just stops compressing what's left. The output plays the same as the MP3 but is roughly 5 to 10 times larger.
Use cases
- Import an MP3 into a DAW or audio editor that only accepts uncompressed WAV input.
- Feed an MP3 into older software or hardware that doesn't support compressed audio formats.
- Get a WAV file for audio editing workflows that expect uncompressed source material.
How it works
- 1
Upload your MP3 file
Drop the file in or select it from your device.
- 2
Click Convert
ffmpeg.wasm decodes the MP3 and writes it out as PCM WAV directly in your browser.
- 3
Download the WAV
Once it's done, download the resulting file.
Technical details
Runs ffmpeg.wasm in your browser. MP3 is lossy — encoding it permanently discards audio information the human ear is less likely to notice. Converting to WAV decodes those already-reduced samples into an uncompressed PCM stream; the file size goes up substantially, but the audio itself doesn't get any closer to the pre-MP3 original.
Frequently asked questions
Does converting MP3 to WAV improve the sound quality?
No. WAV is uncompressed, but the audio data itself is still whatever survived the original MP3 encoding — converting only changes the container, not the quality.
Why is the WAV file so much bigger than the MP3?
WAV stores every audio sample uncompressed, while MP3 is compressed audio; that's normal and expected, not a sign anything went wrong.