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High-Speed Hardware Transcode
MP4 to MP3 runs on a dedicated conversion node built for heavy formats.
Zero Storage Policy
Files stream through worker memory and are purged the moment the output is sent. Nothing touches disk.
No sign-ups
Free for files up to 100 MB each.
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Convert MP4 to MP3 to keep the audio from a video, such as a lecture, podcast recording, interview or song, as a small file that plays on any device.
192 kbps suits most music and speech. Choose 128 kbps for the smallest files, such as spoken audio, or 320 kbps for the highest quality. You can also trim to a start and end time.
Yes. MP4 to MP3 runs on a dedicated conversion server: the file is sent over an encrypted connection, processed in memory, never written to disk or logged, and deleted as soon as the result is returned.
Server tools accept files up to 100 MB each, free and without an account. Very long videos may take a minute or two to process.
Yes. ZapConvert runs in any modern browser, including Safari on iPhone and iPad and Chrome on Android, with nothing to install. You can add several files at once and download them together as a ZIP.