MP4 to MP3
Upload your MP4 video, extract its audio track locally, then preview and download the MP3 file — free, private, and processed entirely in your browser.
About the MP4 to MP3 Converter
Our free online MP4 to MP3 converter extracts the audio track from any MP4 video file so you can save it as a standalone MP3. It's perfect for saving a song from a music video, pulling the voiceover out of a presentation recording, or grabbing a podcast clip from a video file — without needing any extra software.
The entire extraction process happens locally in your browser using the native Web Audio API. Your video is decoded directly from the file you select, so nothing is ever uploaded to a server — your files stay completely private and secure.
How to Convert MP4 to MP3
Step 1
Upload your MP4 video
Drag and drop an MP4 file, or choose one from your device.
Step 2
Click "Extract Audio"
Run the local decoder to pull the audio track out of the video, right in your browser.
Step 3
Preview and download
Listen to the extracted audio in the built-in player, then download your MP3 file instantly.
Frequently Asked Questions
Will extracting audio reduce the sound quality?
No. The tool extracts and decodes the audio track directly from the video stream without any additional compression degradation.
Are my files private?
Yes. All decoding and audio extraction occur locally in your browser using the Web Audio API — no files are ever uploaded to our server.
What audio formats can I upload?
This tool accepts MP4 video files. If you need to convert other video formats to audio, try our Video to MP3 converter.
Does it cost money?
No. Extracting audio from your MP4 video is 100% free, with no registration or account required.