Private ffmpeg conversion
Convert MP3 to WAV
Create WAV files from MP3 audio for editors, DAWs, transcription tools, and workflows that expect PCM. This does not restore quality lost in the MP3, and the WAV will usually be much larger.
Files
No files selected yet.About MP3 and WAV conversion
Some audio editors and production tools prefer WAV because it is straightforward PCM data after decoding. Converting MP3 to WAV can make a file easier to scrub, edit, analyze, or import into software that dislikes compressed input.
The output is not a quality upgrade. ffmpeg.wasm decodes the MP3 and writes a WAV from those decoded samples, so compression artifacts and missing detail from the MP3 remain. File size grows because WAV stores the decoded audio much less compactly.
On the first audio conversion, the page fetches the bundled ffmpeg WebAssembly engine from the same site, roughly 31 MB, and then reuses it for later files. The MP3 itself stays in the browser rather than being uploaded.
Does this upload my files?
No. Everything on this page runs locally in your browser, so your files are never uploaded to a server. Close the tab and nothing is left behind. It even keeps working if you go offline after the page loads.
This is true for every tool on this site. Curious how that works? Read how browser-side processing works.
FAQ
Does MP3 to WAV restore lost quality?
No. WAV can store the decoded MP3 samples, but it cannot recreate audio detail removed by MP3 compression.
Why is the WAV so much larger?
WAV output stores PCM audio, which is far less compressed than MP3 and grows quickly even for short clips.
Is the MP3 processed privately?
Yes. After the one-time ffmpeg.wasm engine download, the conversion runs locally in the browser.