MP4 to MP3 Converter
Extract audio from MP4 videos as MP3 files. Free, fast, and private.
Upload your MP4 video files and extract the audio track as MP3. Perfect for saving music from video files, creating podcast clips from recordings, or getting audio from downloaded videos. The video portion is discarded and only the audio is kept. All processing happens in your browser. Your files never leave your device. Need to extract audio in other formats? Use our audio extractor for WAV and AAC output. Want to compress the MP3 further? Try the audio compressor.
Drop MP4 files here
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Supports: MP4 and M4V video files
How It Works
- 1Upload MP4 files
Click or drag and drop your MP4 video files. Batch extraction is supported for multiple files.
- 2Choose MP3 bitrate
Pick 128kbps, 192kbps, or 320kbps. Higher bitrate = better audio quality but larger file size.
- 3Extract and download
Click Extract MP3 Audio and download your audio files. The video is discarded, only audio is kept. Need to trim the result? Use the Audio Trimmer.
Frequently Asked Questions
Why convert MP4 to MP3?
MP4 files contain both video and audio. If you only need the audio (music, podcast, speech), extracting it as MP3 removes the video data and dramatically reduces file size. A 100 MB video might produce a 5-10 MB MP3 file.
What bitrate should I choose?
320kbps for music and high-fidelity audio. 192kbps for a good balance of quality and file size. 128kbps for speech, podcasts, or when file size matters most. Learn more in our audio bitrate guide.
Does the audio quality depend on the source video?
Yes. The output quality cannot exceed the source audio quality. If the original MP4 has 128kbps AAC audio, converting to 320kbps MP3 will not improve it. The tool re-encodes audio at your selected bitrate from whatever the source contains.
Are my files uploaded to a server?
No. Everything runs in your browser using WebAssembly (FFmpeg compiled for the web). Your MP4 files never leave your device. Nothing is uploaded, stored, or tracked. See our security page for details.
How much smaller will the MP3 be?
MP3 files are typically 90-95% smaller than the source MP4 since the entire video stream is discarded. A 200 MB video at 192kbps MP3 will produce roughly a 7-15 MB audio file depending on duration. Check our MP3 vs MP4 comparison for size examples.
Is this converter free?
Yes. This MP4 to MP3 converter is completely free with no file limits, no signup, and no watermarks. Extract audio from as many videos as you need. Also try our Audio Compressor, WAV to MP3, and FLAC to MP3 converters.