MP3 Editor

A little macOS app for editing MP3 metadata and audio without the command line or a full DAW.

Features

• Edit common tags: title, artist, album, genre, year, track, disc, BPM, compilation flag
• Edit album art with drag-and-drop support (displays image dimensions)
• Edit macOS "Where from" download source metadata
• Audio editing: trim, pitch shift, speed adjustment
• Save in place or as a copy

Building from Source

Requires macOS 13.0+ and Python 3. Double-click build or run ./build to build a self-contained app bundle.

Technical Details

UI built with SwiftUI. ID3 tag reading/writing handled by Python backend using mutagen and pydub with bundled ffmpeg. Swift communicates with Python via JSON over stdin/stdout pipes. Album art transferred as base64-encoded data.

Support

If you find this useful, buy me a coffee.