MP3 → WAV · Free · No Upload · No Sign-Up
Convert MP3 to WAV Online Free — No Installation Needed
Convert MP3 to WAV directly in your browser, in seconds. Free, unlimited, and private: your file never leaves your device.
100% local processing: your file never leaves your device. Once the page loads, it even works offline.
Supported formats:.mp3 files up to 300 MB — processed locally · Video and virtually any audio format are also accepted — we extract the audio automatically.
How it works
- 01
Upload the MP3 file
Drag your .mp3 file to the area above or click to select. Accepts files up to 300 MB — all processed locally.
- 02
Conversion runs in your browser
FFmpeg (the same engine used by professionals) runs in WebAssembly inside the page. No byte is sent to servers — total privacy.
- 03
Download the WAV
In seconds, the .wav file is ready for download, with 190 kbps (VBR) quality — ideal for voice and music.
Frequently asked questions
Why convert MP3 to WAV?
Audio editors, DAWs, and mixing consoles often require WAV PCM — the conversion produces a standard 16-bit WAV ready for editing.
What if I need the text from this audio?
After converting, you can transcribe the file with AI in VoxScriber: 30 free minutes per month, with automatic punctuation and speaker identification. Ideal for WhatsApp audios, meetings, and interviews.
Is the Convert MP3 to WAV Online Free truly free?
Yes, free and unlimited. The processing happens in YOUR browser (WebAssembly), so we have no server cost — and you don't need to create an account.
Is my file sent to any server?
No. All processing is local (FFmpeg compiled to WebAssembly running on the page). The file never leaves your device — it even works offline after the page loads.
Is there a size or quantity limit?
The limit is 300 MB per file (browser memory). There is no limit on the number of uses. For larger files, VoxScriber processes on the server with uploads up to 5 GB.
Does it work on mobile?
Yes — any modern browser (Chrome, Safari, Firefox, Edge) on desktop or mobile. On older phones, large files may take longer.
Need the text from this audio? Transcribe with AI — 30 min free
Create free account →30 minutes/month free. No credit card required.