WAV → MP3 · Free · No Upload · No Registration
Free WAV to MP3 Converter Online — No Installation
Convert WAV to MP3 directly in the 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:.wav 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 WAV file
Drag the .wav file to the area above or click to select. Accepts files up to 300 MB — all processed locally.
- 02
The 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 MP3
In seconds the .mp3 file is ready for download, with 190 kbps (VBR) quality — ideal for voice and music.
Frequently asked questions
Why convert WAV to MP3?
Uncompressed WAV takes ~10 MB per minute; in MP3 it drops ~10x in size with virtually identical quality for voice.
What if I need the text of this audio?
After converting, you can transcribe the file with AI on VoxScriber: 30 free minutes per month, with automatic punctuation and speaker identification. Ideal for WhatsApp audio, meetings, and interviews.
Is the WAV to MP3 Converter Online Free really 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 in 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 number of uses. For larger files, VoxScriber processes on the server with upload 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 of this audio? Transcribe with AI — 30 min free
Create free account →30 minutes/month free. No credit card required.