MP3Gain - Audio Normalization

Make all your audio the same volume — without touching the volume dial.

Ever jump from one song to the next and grab for the volume button? Or finish a podcast that's twice as loud as the one before? MP3Gain fixes that. It measures the true loudness of your audio and applies exactly the right amount of gain, so everything you listen to, share, or upload sounds even and professional.

Quick for everyday fixes. Precise for creators.

Three measurement modes cover every job:

• Peak — match tracks to a target peak level (in dB).
• RMS — match the average energy of your tracks for consistent perceived volume.
• EBU R128 (LUFS) — the international loudness standard used by streaming and broadcast platforms, with true-peak limiting.

Built-in presets
Start in one tap with presets tuned to real-world targets, and save your own for repeat jobs.

• Music — RMS -20 dB
• Podcast — EBU R128 -16 LUFS
• Voice — EBU R128 -18 LUFS
• Streaming Video — EBU R128 -14 LUFS
• Default — EBU R128 -23 LUFS

Batch processing
Import a whole album, playlist, or batch of files and normalize them all at once. Adjust one file and apply the same settings to every file in your list. Progress is shown per file, and you can cancel anytime.

Hear it before you export
Play the original and the processed version side by side in the app, so you know it sounds right before you save or share it.

Keep your music intact
MP3Gain preserves embedded album art and metadata. Lossy formats keep their original bitrate; lossless files are processed without additional lossy compression.

Import from anywhere
• Select files from the Files app
• Pull tracks straight from your Music Library
• Open an audio file in MP3Gain from any app

Note: DRM-protected tracks — for example, Apple Music subscription titles — can't be imported or processed.

Supported formats
MP3, FLAC, M4A, WAV, AIFF, and OGG.

MP3Gain Pro
The free plan processes up to 3 files per day — perfect for quick fixes. Upgrade to MP3Gain Pro for unlimited processing:

• Yearly — $9.99/year
• Lifetime — pay once at $19.99 and unlock forever

Subscriptions renew automatically and can be managed or cancelled anytime in your Apple ID settings. Payment is charged to your Apple ID account at confirmation of purchase. The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours prior to the end of the current period. You can manage or turn off auto-renewal at any time in your Apple ID account settings.

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