MP4 to MP3 Converter
Extract MP3 audio from MP4 videos at up to 320 kbps. Private — videos are processed on your device.
How to convert MP4 to MP3
- 1
Choose your MP4 files
Click the upload area or drag files onto it. Nothing is uploaded — files are opened locally.
- 2
Adjust the settings
Pick audio quality, then press the convert button.
- 3
Download the result
Save each file individually or everything at once as a ZIP.
Save the audio track of a lecture, interview, podcast recording or music video as an MP3 you can play anywhere.
What is MP4?
MP4 is the most widely supported video format, used by phones, cameras, YouTube and every social platform.
What is MP3?
MP3 is the universal compressed audio format. It plays on every device, car stereo and music app with small file sizes.
Safe for confidential files
Unlike upload-based converters, ZapMorph processes files inside your browser tab. Your documents are never transmitted, stored or logged — close the tab and they’re gone.
Frequently asked questions
Is the mp4 to mp3 converter free?
This is a Pro tool. With a free account you get one run a day to try it; Pro and Lifetime plans include unlimited use.
Are my files uploaded to a server?
No. The conversion runs entirely in your browser, so your files never leave your device. We only count how many files you convert — never their names or contents.
What is the maximum file size?
Up to 25 MB per file without an account, 50 MB with a free account, and 1 GB on Pro. Very large files also depend on your device’s memory.
Can I convert multiple MP4 files at once?
Yes. Select several MP4 files at once — up to 5 on the free plan or 50 on Pro — and download all results in a single ZIP.
Does it work on Mac, Windows, iPhone and Android?
Yes. It works in any modern browser — Chrome, Edge, Firefox and Safari — on desktop and mobile, with nothing to install.
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