MP4's audio track is usually lossy AAC. Extracting and converting to MP3 lets you play it on nearly any device or app, separate from the video.
About MP4
Common video container format
MP4 is the most widely used video container, bundling video, audio (usually AAC), and subtitles together; this tool extracts the audio track and converts it to common audio formats.
- Excellent compatibility — plays on nearly every device and platform
- Requires extracting the audio track first; the full video file is much larger than the audio alone
About MP3
The most popular lossy format
MP3 is a lossy audio format that greatly reduces file size while keeping near-CD perceived quality. It is supported by virtually every device and player, making it the top choice for sharing.
- Small file size, easy to share
- Universally supported by devices
- Lossy compression cannot restore lost audio
MP4 to MP3 FAQ
Will converting MP4 to MP3 lose quality?
Both MP4 and MP3 are lossy formats. Re-compression may further reduce quality — choose a higher bitrate to minimize additional loss.
Will the file size change after conversion?
Converting to a lossless format (WAV) usually increases size, while converting to a lossy format (MP3, AAC) usually decreases it, depending on the chosen bitrate and sample rate.
How do I batch convert MP4 to MP3?
Just drop multiple MP4 files in; they are converted to MP3 one by one via a queue. You can download them individually or as a single ZIP.