Convert MP4 to MP3 Free - No File Upload
Extract audio from MP4 files and convert to MP3 in your browser. 100% private, no hidden limits.
All processing happens in your browser
Select a file
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Supported formats: MP4, WEBM, MOV, M4A, OGG, WAV
Limits: 100 MB, 30 minutes
How to Convert MP4 to MP3
Select your MP4 file
Drag or select the MP4 video you want to extract audio from
Automatic conversion
We extract the audio and convert it to MP3 in seconds
Download your MP3
MP3 file ready to play on any device
Frequently Asked Questions - MP4 to MP3
Why convert MP4 to MP3?
MP4 files contain video and audio, taking up a lot of space. If you only need the audio (music, podcasts, recordings), converting to MP3 reduces the size by up to 90% while maintaining good quality.
Does MP3 maintain the quality of MP4?
We convert to 128 kbps, the standard for quality/size balance. If the original MP4 audio was high quality, the MP3 will be virtually indistinguishable to the human ear.
Does it work with downloaded YouTube videos?
Yes, if you have an MP4 video downloaded from YouTube (or another platform), you can extract its audio to MP3. Just drag the MP4 file.
Is it legal to convert MP4 to MP3?
Converting your own files or files you have the right to use is completely legal. Make sure to respect the content's copyright.
How much does it reduce the file size?
Example: a 200 MB MP4 (video + audio) converts to ~60 MB of MP3 audio. Typical reduction of 70-90% depending on the original video.
Can I use PrivAudio on mobile?
Yes, it works perfectly on iPhone and Android. Just open the web in Safari or Chrome. No app installation needed.