MP3 to WAV Converter
Runs in your browser — your files are never uploaded.
Decompress an MP3 into an uncompressed WAV file — useful for audio editors and DAWs that prefer to work with raw PCM rather than a compressed format. OkConverter runs a real copy of ffmpeg compiled to WebAssembly directly in your browser, so the file is never uploaded.
How to convert MP3 to WAV
- 1
Drop your MP3 file onto the box, or click to choose one.
- 2
OkConverter loads the conversion engine (one-time per session) and decodes it locally.
- 3
Click “Download” to save the WAV file.
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Frequently asked questions
Why convert MP3 to WAV if WAV is bigger?+
Some audio editors and older hardware samplers work better with, or require, uncompressed PCM audio. WAV is also simpler to edit sample-by-sample without re-introducing compression artifacts on every save.
Does this improve the audio quality?+
No — MP3 compression is lossy, so whatever detail was already discarded when the MP3 was encoded stays gone. This just decompresses to an uncompressed container; it can’t add back lost audio information.
Why does the first conversion take longer?+
The tool loads a real build of ffmpeg compiled to WebAssembly (about 31 MB) the first time you use it on this page. It stays loaded for the rest of your session.
Is my file uploaded anywhere?+
No. Once the engine has loaded, decoding happens entirely inside your browser tab — the audio file itself is never sent to a server.