SwapAnything.io – MP4 to MP3 Converter – Instantly extract MP3 audio from MP4 videos

Summary: SwapAnything.io is a browser-based tool that extracts MP3 audio from MP4 video files locally on your device without uploading to a server. It supports batch processing, audio preview, and bulk ZIP export for efficient conversion.

What it does

The tool converts MP4 videos to high-quality MP3 audio directly in the browser by dragging and dropping files. Users can preview audio before downloading or export multiple MP3s as a ZIP file.

Who it's for

It is designed for podcasters, musicians, students, and anyone needing quick, private MP4-to-MP3 conversions without software installation or sign-up.

Why it matters

It ensures privacy by processing files locally, eliminating uploads and protecting user data during audio extraction.