MP3 Metadata Editor

An MP3 without tags shows up as "Unknown Artist, Track 01" in every player. The Metadata Editor fixes that in the browser: pick the files, fill in three short screens, download the tagged copies. Audio is untouched; only the label changes.

#Three screens

1. 1
   Select Single Track or Select Album

   Both open the same file picker; the album button just reminds you that you can pick many MP3s at once. Add Track on the next screen adds more later.
2. 2
   Track-Specific

   Per file: Track Title, Artist Name, Featuring Artist, Track Number, Composer and Lyrics. Expand a row with the pencil, remove one with the cross.
3. 3
   Album Details

   Shared by every file you loaded: Album Title, Year, Genre, Total Tracks, Copyright and Comment. Type once, it lands on all of them.
4. 4
   Album Art

   Drop an image or click to browse. A cropper makes it square; zoom and rotate if the source is not. The same art goes on every file.
5. 5
   Save Changes

   Or Save All Files for an album. Each MP3 downloads with its new tag, one after another.

#What gets written

#The downloaded file

• Files are renamed to Title - Artist.mp3 (or just Title.mp3), so a folder of "final_v3_bounce.mp3" turns into a readable album.
• The audio is copied bit for bit. No re-encoding, no quality change, no watermark.
• The tag uses the ID3 version every player, car stereo and streaming uploader reads.
• Album art is stored at 300 by 300 pixels, small enough to keep files light and large enough for player screens. Use a JPEG or PNG of at least that size.