Konvizi
Free No upload
Drop your MP3 files: their sound is converted to WAV on your device, without uploading anything.
Drop your MP3 files here
or
Your files stay on your device
Konvizi’s “MP3 to WAV” tool is free, with no sign-up, no watermark and no file limit. All the processing happens in your browser, on your device: your files are never uploaded to a server, which makes it suitable for personal and confidential documents.
Drag your MP3 files into the box above or click “Choose files”. You can add several at once.
Your browser reads the sound of each file and saves it as WAV. Nothing is sent over the internet.
Get your WAV files one by one, or all together with “Download all”.
MP3 is the most widespread audio format. It compresses sound by removing what the ear barely hears, giving files about ten times smaller than a raw recording.
But it is a compressed format: to edit a sound in audio software or burn an audio CD, an uncompressed WAV file is often required.
WAV is an uncompressed audio format: the sound is stored as is, with no loss at all. It is the format of audio editors, recorders and audio CDs.
WAV is ideal for editing a sound in Audacity, GarageBand or any audio editor. Konvizi creates a standard 16-bit, 44.1 kHz WAV that works everywhere.
Voice memos, meeting recordings, music: the sound is decoded and re-encoded by your browser, with no upload. No waiting while a big file uploads, and no private recording ends up on a server.
Your files never leave your device. No upload, no storage.
No upload and no queue: the conversion starts right away.
As many files as you like, with no imposed size limit.
No sign-up, no watermark, no subscription.
| Konvizi | Typical online converter | |
|---|---|---|
| Where your files are processed | In your browser, on your device | On the service’s servers |
| Upload to the internet | None | Required, then you download the result |
| Storage of your files | None: nothing is stored | Stored on a server, at least while processing |
| Waiting time | Starts instantly | Upload time, sometimes a queue |
| Account | Never required | Often required beyond a few files |
| Watermark and limits | No watermark, no maximum number | Common on free plans |
Yes, completely. No sign-up, no watermark, no maximum number of files: you can convert as many files as you like.
No. Everything happens in your browser, on your device. Your files are never sent over the internet: nobody but you can see them.
WAV is uncompressed: expect about 10 MB per minute in stereo (16-bit, 44.1 kHz). That is normal, and it is what makes it ideal for editing.
No: what MP3 compression removed does not come back. WAV simply gives you an uncompressed file that every editing and burning program accepts.
Open your browser’s developer tools (F12 key), go to the “Network” tab and run a conversion: no request carries your file. The site also enforces a security rule (Content-Security-Policy) that forbids the browser from contacting any site other than konvizi.com, and konvizi.com is a static site with no service able to receive files.
Yes. Konvizi works in the browser of your phone or tablet (Safari, Chrome…) just like on a computer, with no app to install. Very large files are processed faster on a computer, which has more memory.