Edit audio tags

How to Save the tags

1. 1

   Add your audio file

   MP3, FLAC, M4A, OGG or WAV, up to 200 MB. The fields fill in with whatever the file already says.

2. 2

   Edit the title, artist, album or cover

   Change one field or all of them. Anything you leave alone stays exactly as it was.

3. 3

   Click Save and download

   Only the tag block is rewritten; the audio itself is copied across unchanged.

The sound is not re-encoded

This is the whole point of the tool, so it deserves a precise description. A tag lives in a block of bytes at the front of the file, separate from the audio. Changing an artist name means rewriting that block and copying the audio across untouched, not decoding it and encoding it again. Tools that get this wrong hand you back an MP3 that has been through a second generation of lossy compression for the sake of a spelling correction. Here the audio packets are copied byte for byte, which is also why saving takes a fraction of a second rather than a minute.

Why the fields are already filled in

Because editing tags is almost always editing one field out of five. A form that started blank would quietly wipe the other four the moment you saved. So the file is read first, title, artist, album, year and the cover image, and everything you do not touch goes back out exactly as it came in.

The old ID3v1 tag at the end of the file

MP3 has two tag formats living in the same file. ID3v2 sits at the front and holds arbitrarily long text; ID3v1 is a fixed 128 bytes glued to the very end, with 30 characters per field. Plenty of files have both, and they disagree: one player reads one, another reads the other, and the track shows up under two different names depending on where you look. When this page writes a new ID3v2 tag it removes any ID3v1 block left at the end, so there is exactly one answer to what the file is called. If your file only has the legacy tag, you are told: the values you see have already been cut to 30 characters by whatever wrote them.

Cover art, and the formats that can hold it

JPEG and PNG, up to 5 MB and 3000 pixels on a side. MP3, FLAC, M4A and OGG all carry a cover, though they do it in three different ways underneath: a picture frame in MP3, an attached image stream in FLAC and M4A, and a base64-encoded block in OGG's comment header. WAV carries none of them: the format has no place to put one, so the field is not shown for WAV files rather than being offered and then ignored.

Formats where tags cannot be edited here

Bare AAC, Opus, WMA, AIFF and AMR are readable as audio but have no standard, widely-supported tag block that this page can rewrite safely. Rather than write something that half the players will ignore, the tool says so and offers to convert the file to MP3 first, after which every field on this page works normally.

Frequently asked questions