MP4 to MP3 Converter
Extract the audio track from an MP4 video and save it as an MP3 file, entirely inside your browser using WebAssembly. No file size limits, no uploads, no accounts.
How to use the MP4 to MP3 Converter
- 1
Open the tool above — it is already running, no install or account needed.
- 2
Enter your input and adjust the options to match what you need.
- 3
Copy or download the result — everything was processed locally in your browser.
Private by design
This tool runs 100% inside your own browser using local JavaScript — your input never touches a server. That makes it instant, offline-capable in many cases, and private even for sensitive data.
Frequently asked questions
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