Coming to the App Store
Datum
A native tag editor for your music library, on Mac and iPad. Open a folder, edit the metadata across your tracks, and save to disk only when you decide to. No library to import, no database, no cloud account. Your files stay exactly where they are.
What it does
Every file you actually have
FLAC, Apple Lossless and AAC (M4A / MP4), MP3, OGG Vorbis and Opus, WAV, and AIFF. Mix them freely: select a FLAC, an MP3, and an M4A together and edit them in one go.
Several tracks at once
Select several tracks and Datum shows what they share. Fields with the same value are ready to edit; fields that differ are marked so you don't overwrite them by accident. Change one field and it applies to every selected track on save.
Safe with your files
Datum edits metadata in place. It never re-encodes your audio and never rewrites a file from a template: tags it doesn't display, like ReplayGain, MusicBrainz IDs, or lyrics, are preserved exactly as they were.
Artwork included
View, replace, and extract embedded cover art in every supported format, including OGG. Drop an image on the editor and it applies to the whole selection.
Discogs, numbering, undo
Look up album details from Discogs and apply them in one step, auto-number tracks in sequence, search across your loaded files, and undo anything. Manual save: Datum never touches your files until you hit Save.
Straight from the Files app
Open folders from the Files app, including iCloud Drive. The same careful editing model, the same formats, built for touch.
In short
A clean, focused tool for people who care about their music files
Datum is built in Swift, native on both platforms, and collects nothing: no accounts, no analytics, no ads, no third-party SDKs. The optional Discogs lookup on macOS makes a single anonymous web request for the album you choose. One purchase covers Mac and iPad.
Updates
Support
Need help, found a bug, or want a feature? Email me and I'll get back to you. See also the privacy policy.