Convert MP3 to WAV
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Some software — older editing tools, certain DAWs, sample-based instruments, telephony systems — expects uncompressed WAV audio and either rejects MP3 or handles it poorly. This tool decodes your MP3 and writes it back out as standard 16-bit PCM WAV, the format almost everything accepts.
The decode-and-write happens locally through WebAssembly, right in your browser tab. Your MP3 never gets uploaded — it stays on your device from start to finish, and the WAV file comes straight back to you.
Also useful: Convert WAV to MP3 · Convert M4A to MP3
How it works
- 1. Drop your MP3 file into the box above or click to browse.
- 2. Click convert — the file is decoded and re-encoded to uncompressed WAV right in your browser.
- 3. Download the WAV file once it’s done.
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Frequently asked questions
Will this improve the audio quality?
No — MP3 is lossy, so whatever quality was lost during the original MP3 encode is already baked in and can’t be recovered. This tool just repackages that same audio into an uncompressed WAV container that more software can open.
Is my MP3 file uploaded during conversion?
No. The entire process runs client-side using WebAssembly — nothing is sent to a server, so it also works offline once the page has loaded.
What size can I convert, and does my browser matter?
Up to 300MB on desktop (100MB on mobile), with no duration limit since only audio is processed. Any modern browser with WebAssembly support works — note the resulting WAV file will be considerably larger than the source MP3.
Do I need an account?
No. There is no sign-up, no account, and no email required for any tool on this site — just pick your file and convert.