432 Librarian
Music Library Manager and Auto Fill
432 Librarian checks your music library and fixes it: titles, artists, albums, track numbers, cover art and lyrics. You review every change before it is saved, and you can undo it after.
- Fill in missing titles, artists, albums, years and genres from music databases.
- Add cover art and synced lyrics to your own files.
- See which songs your albums are missing, and keep a Wanted list.
- Convert songs to 432 Hz if you prefer how they sound.
- Your songs stay on your device.
Starting the app…
Questions and answers
What does 432 Librarian fix?
Song titles, artists, albums, track numbers, years, genres, cover art and lyrics. It looks them up in the open MusicBrainz data and other music databases, and shows you every change to review before it is saved.
Is it free?
Yes, to start. Without an account you can check your whole library and fix 25 songs. A free account fixes 100 songs a month and one whole album a day, and uses the audio tools (convert, 432 Hz files, loudness) 3 times a day. Pro removes the limits, and a 432 Pro plan from the web player, the browser extension or Android counts too.
Does it change my music files?
Only after you review the changes. Fixes are saved into your own files, with a backup copy and Undo. Your songs stay on your device.
Where do Buy links go?
To the store or service you choose in Settings: Amazon by default, or Apple Music, Spotify, YouTube Music or Deezer. Some links earn us a commission, at no extra cost to you.
Which devices does it work on?
It works in a web browser today. Apps for Android and iPhone are planned.