MP3 to WAV

What this does

This is the conversion editors and DJ software ask for. WAV is uncompressed, so every tool can read it, seek in it instantly, and process it without decoding on the fly — which is why a piece of software will sometimes insist on it even when the MP3 plays perfectly well.

Going back to WAV gives you uncompressed audio again for editing — though nothing lost in the original MP3 comes back.

What it does and does not restore

Converting an MP3 to WAV decodes it back to raw samples. The file becomes large again — roughly 10 MB per minute at CD settings, so a 4 MB MP3 becomes something like a 30 MB WAV. What it does not do is restore quality. The detail the MP3 encoder discarded is gone, and decoding cannot invent it. The result is an uncompressed container holding exactly what the MP3 held. That is genuinely useful for editing, because further processing no longer stacks compression on compression; it is not an upgrade in fidelity, and no converter can make it one.

Nothing is uploaded

The conversion happens inside this page. Your file is read by the browser, converted here, and saved straight back to your downloads. It is never sent to a server, so there is no upload wait and no size cap beyond what your own device can hold.

Open your browser’s developer tools, switch to the network panel, and convert a file. You will see the converter itself download once, and no upload of your audio at all. That is the whole difference between this and a site that converts on a server, and what that difference actually means is worth a read.

The first conversion is slower

The converter is about 32 MB and downloads the first time you use it, which is the one moment this page is not instant. After that it is cached, and later conversions start immediately, even offline. So do later visits.

Questions