MP4 to MP3 Converter
Extract audio from MP4 video and save as MP3. Free, private, and runs entirely in your browser — up to 100 MB.
- No signup
- Private
- Fast
Super Fast
Convert in seconds on desktop and mobile.
100% Private
Files never leave your device.
Secure
Browser-side processing only.
Universal MP3 output
Works on virtually every device and app.
Why use this tool?
Need just the soundtrack from a video clip? This tool strips the audio track and exports MP3 without uploading your file.
How to convert MP4 to MP3
Step 1: Upload your MP4 file
Choose an MP4 audio file from your device or drag it into the upload area. Files up to 100 MB are supported.
Step 2: Convert in your browser
We convert the audio to MP3 locally using FFmpeg in your browser — nothing is uploaded to our servers.
Step 3: Download your MP3
Preview the result and download the converted file with one click.
Supported formats
- Input: MP4 (.mp4) up to 100 MB
- Output: MP3
Frequently asked questions
Is this MP4 to MP3 converter free?
Yes. Convert MP4 to MP3 online for free — no account, no watermark, and no limits on how many files you convert.
Are my files uploaded to your servers?
No. Conversion runs entirely in your browser with FFmpeg WebAssembly. Your files never leave your device.
What is the maximum file size?
You can convert MP4 files up to 100 MB per file. Very large files may be slow or fail on low-memory devices.
Why does the first conversion take longer?
The first run downloads the FFmpeg engine into your browser (one time per session). Later conversions on the same page are faster.
Does this keep the video?
No. This tool extracts the audio track only and outputs an MP3 file.