Are files uploaded?
No. Decoding runs in your browser via WebAssembly — MP3s never leave your device, and nothing is sent to a server.
MP3 to WAV
Uncompressed WAV, right in your browser
The browser engine decodes MP3 frames on your device and gives you PCM WAV downloads for editing, mastering, or archiving. Nothing is uploaded — no servers, no accounts, no tracking of your audio. Add a batch, pick a sample rate, get WAV in seconds.
WAV output presets
16-bit · 44.1 kHzCD-quality baseline for music and podcasts
16-bit · 48 kHzVideo editing standard, matches most DAWs
24-bit · 44.1 kHzMore headroom for mixing and mastering
24-bit · 48 kHzStudio delivery, film and broadcast masters
Get it as a Chrome extension
Prefer to keep the converter one click away? The same private WAV ⇄ MP3 tool opens in the Chrome side panel of any tab.
How it works
1.Drop your MP3 files
Drag files onto the page or click to browse. Up to 15 MP3 files at a time, 200 MB each (50 MB on mobile).
2.Pick sample rate and depth
Match the source, or force 44.1 / 48 kHz, 16 or 24-bit, mono or stereo. Advanced options add trimming and loudness matching.
3.Decode in your browser
A WebAssembly decoder runs in a Web Worker on your device. MP3 frames turn into uncompressed WAV without any upload.
4.Download WAV
Save each WAV separately, or grab the whole batch as a ZIP. Turn on "Download after conversion" to auto-save when each file is done.
FAQ
Which sample rate should I pick?
"Match source" keeps the original rate — safest default. Choose 44.1 kHz for CD or podcasts, 48 kHz for video and DAW projects.
16-bit or 24-bit?
16-bit matches standard MP3 fidelity and keeps files smaller. 24-bit gives you more headroom for editing and mixing stages.
Is there a Chrome extension?
Yes — the free WAV ⇄ MP3 extension for Chrome converts both directions from the browser side panel. Same privacy, always one click away.
Contact us
Have a partnership idea, a feature request, or a bug to report? Drop a message — we read every one. Leave an email if you'd like a reply.