mp3rgain – lossless MP3 volume adjustment

mp3rgain adjusts MP3 volume without re-encoding by modifying the global_gain field in each frame’s side information. This preserves audio quality while achieving permanent volume changes.

This is free and open source software.

Features include:

• Lossless & Reversible: No re-encoding, all changes can be undone.
• ReplayGain: Track and album gain analysis with AAC/M4A support.
• Zero dependencies: Single static binary (no ffmpeg, no mp3gain).
• Cross-platform: Linux, macOS, Windows (x86_64 and ARM64).
• mp3gain compatible: Drop-in replacement with identical CLI.
• GUI Application: Native desktop app for drag-and-drop workflow.

Website: github.com/M-Igashi/mp3rgain
Support:
Developer: Jesse Pinkman
License: MIT License

mp3rgain is written in Rust. Learn Rust with our recommended free books and free tutorials.

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