MP3 tag editor, title, artist and cover art.

An MP3 tag editor changes the text and picture stored inside an MP3 file: the title, artist, album, year, track number, genre and cover art that music apps and phones show. This free online MP3 tag editor writes those ID3 tags in your browser and gives you the file back, with the music data exactly as it was. Nothing is uploaded, so it is safe for unreleased music and private recordings.

How to use the MP3 tag editor

1. Drop one or more MP3 files on the box, or click it to choose them. Each file appears in the list with its current artist and title.
2. Click a file to edit it. To edit several at once, tick their boxes, hold Shift to select a range, or tick Select all.
3. Type in the boxes. A box that is empty with the words Different in each file means the selected files disagree; leave it alone to keep each file's own value.
4. For a cover, press Choose a picture or drop an image on the cover box. Remove takes the picture out, and Save picture pulls the current one out as a file.
5. Press Download this MP3, or Download all as ZIP when you have several files.

Tag a whole album in a few clicks

Select all the songs, type the album, album artist, year and genre once, and add one cover. Then press Number tracks in list order: the files get 1/10, 2/10 and so on, using the order of the list. If your files are named like 03 - Artist - Song.mp3, Fill from file names reads the track, artist and title from the name. Check the result before you save, because a file name that does not follow the pattern is read as a title only. Under File names you can have the saved files named Artist - Title, or 01 Title.

What each field is stored as

The frame names and the track format come from the ID3v2.3 specification on id3.org, checked 26 Oct 2026. It describes the track as a number that may be extended as N/M, for example 4/9, and the year as always four characters.

Which tag version to pick

ID3v2.3 is the default because every player reads it, including older car stereos, Windows and iTunes. Text outside Latin-1 is saved as Unicode with a byte order mark, as that version asks. ID3v2.4 is the newer version and stores text as UTF-8 with a single date field. Pick it only if you know your player wants it. Frames the editor does not show, such as lyrics, comments from other programs and ReplayGain, are carried over to the new version.

The old ID3v1 block

Some files end with a 128-byte ID3v1 tag, the oldest format. According to id3.org (checked 26 Oct 2026) its title, artist and album are 30 bytes each and its year is 4. If a file has one, the editor updates it to match, cutting long names at 30 characters and replacing letters outside Latin-1 with a question mark. Files without one do not get one.

Proof the audio is unchanged

When a file is loaded, the page works out the SHA-256 of everything after the tag, which is the music. After saving it does the same on the new file and stops with an error if the two differ. The status line above the files says when they matched. To check it yourself, use the file hash checker on the audio, or compare the length and bitrate of the old and new file in any player.

Common problems

• The player still shows the old tag. Some apps keep their own library. Remove the song and add it again, or refresh its info.
• The cover does not show. Use a JPG or PNG. Other formats are converted to JPG for you. Very big pictures may be ignored by small players, so tick the shrink box.
• The file was skipped. Only MP3 files work. For M4A, WAV or FLAC, convert first with the audio converter.

To cut a song before tagging it, use the audio cutter. To make the files smaller, try the MP3 compressor, which keeps the title and cover.