Convert MP4 to MP3 — Free, No Upload
Runs entirely in your browser. Nothing is sent to any server.
Why convert MP4 to MP3?
Stripping the audio from an MP4 video as an MP3 is the fastest way to get the soundtrack, podcast recording, or speech out of a video file. MP3 plays everywhere and takes up a fraction of the space.
What is MP4?
MP4 (MPEG-4) is the most widely supported video format in the world. It plays natively on every phone, TV, browser, and media player.
What is MP3?
MP3 is the universal audio format — small file size, compatible with every device and app on the planet.
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Frequently asked questions
Is this MP4 to MP3 converter really free?
Yes, completely free. No account, no credit card, no watermark, no file size limit imposed by a paywall. Convifi is free to use forever.
Is my file safe when I convert MP4 to MP3?
Your file never leaves your device. All conversion happens locally in your browser using WebAssembly. There is no upload to any server — not even Convifi's.
Does this work on iPhone, Mac, and Windows?
Yes. Because it runs in the browser, it works on any device — iPhone, Android, Mac, Windows, or Linux — as long as you have a modern browser like Chrome, Safari, Firefox, or Edge.
How long does MP4 to MP3 conversion take?
Conversion time depends on your file size and device. Most files convert in under 30 seconds. Longer videos or high-resolution images may take a minute or two. Nothing is being sent over the network, so your connection speed has no effect.