Free MP4 to MP3 Converter
Extract the audio from an MP4 video as an MP3 file, directly in your browser.
Add a file to convert
Choose an audio or video file.
Maximum 100 MBProcessed in your browser. Your audio never leaves your device.
How to convert MP4 to MP3
- Choose an MP4 video file you have the right to use.
- Pick an MP3 bitrate.
- Select Convert to MP3.
- Download the result.
How this works
Your browser decodes the MP4 file's audio track using its own built-in audio engine, then encodes the decoded audio as a real MP3 file using a genuine MP3 encoder running entirely in your browser — no video is uploaded, and no server-side conversion is involved.
A note on scope
This extracts and converts the audio track only — the video portion is discarded. For a version that keeps the original audio format instead of converting to MP3, see Extract Audio from Video.
Common use cases
- Extract just the audio track from your own MP4 video as MP3
- Save a meeting, lecture, or voiceover recording as MP3
- Create an audio-only copy of a video you have rights to use
Frequently asked questions
Is this MP4 to MP3 converter free?
Yes. It is completely free, with no signup and no limits.
Is my video uploaded anywhere?
No. The conversion happens entirely in your browser. Nothing is sent to Inqita or stored.
Does this keep the video, or just the audio?
Just the audio — the video portion is discarded, and you get back a standalone MP3 file.
What bitrate should I choose?
128 kbps is a good default for most uses. Choose 192 or 320 kbps for higher quality, or 96 kbps for a smaller file.
Is this a real MP3 file?
Yes. It's encoded with a genuine MP3 encoder, not renamed or repackaged audio, so it plays correctly in any MP3-compatible app or device.