Audio Tag Editor
Give your MP3s proper titles, artists and album art. Read the existing ID3 tags, correct them, add a cover image that shows in music players and car displays, and save, without re-encoding the audio.
- Files stay on your device
- No sign-up
- Free to use
Cover art
Square images work best. Covers are saved as 1000 × 1000 px JPG at most.
ID3 tags
Tags are written directly into the MP3 in your browser; the audio is not re-encoded.
How to use Audio Tag Editor
- Drop an MP3 onto the upload area. Existing tags and cover art are shown.
- Edit the title, artist, album, album artist, year, genre, track and comment.
- Choose a cover image to add or replace the artwork, or remove it.
- Select Save tags and download the updated MP3.
Audio Tag Editor features
Reads ID3v2.3 and v2.4
Loads existing tags written by most tagging software, including Unicode text.
Album cover art
Add, replace or remove the embedded front cover; images are resized to at most 1000 × 1000 pixels.
Unicode-safe writing
Tags are written as ID3v2.3 with UTF-16 text, the most widely compatible combination.
Other frames kept
Lyrics and other frames you do not edit are preserved.
Audio untouched
The MP3 audio frames are copied as they are.
Fully in the browser
No upload; the file is rewritten on your device.
When to use Audio Tag Editor
- Adding album art so music looks right on phones and car screens.
- Fixing songs that show as “Unknown artist” or “Track 01”.
- Tagging your own recordings, demos or podcast episodes before release.
- Correcting non-Latin titles that display as garbled characters.
- Preparing audiobook chapters with consistent album and track numbers.
Audio Tag Editor FAQ
What is an ID3 tag?
ID3 is the metadata format for MP3 files. Version 2 stores frames such as title (TIT2), artist (TPE1) and attached pictures (APIC) at the start of the file.
Why ID3v2.3 instead of v2.4?
ID3v2.3 is understood by practically every player, including Windows, older car stereos and many phones. Some software still mishandles v2.4.
What size should cover art be?
Square images between 500 and 1000 pixels work everywhere. Larger images are reduced automatically to keep the MP3 small.
Does this work with M4A or FLAC files?
This editor is for MP3. Use the Audio Metadata Editor for other formats.
What happens to an old ID3v1 tag?
It is removed, so it cannot show different information from the new ID3v2 tag.
How ID3 tags and cover art are stored
MP3 was designed without any place for song information, so the ID3 tag was added later. The first version squeezed a title, artist and a few other fields into 128 bytes at the end of the file. ID3v2 replaced it with a flexible block at the start of the file made of frames, each with a four-letter name, a size and a body, which allows long Unicode text, comments and pictures.
Cover art lives in an APIC frame containing the image’s file type, a picture type such as “front cover”, an optional description and the image data itself. Players display the front cover in their library and on lock screens; car head units often show it too. Keeping the embedded image to a sensible size avoids bloating every song in a library.
Text encoding is the most common source of garbled tags. Old tools wrote titles in local code pages that other systems misread. Writing UTF-16 text, as this editor does, ensures accented letters and non-Latin scripts display correctly everywhere.
Because the tag sits before the audio, rewriting it does not touch the audio frames. The editor removes the old tag, writes a new one with a little padding for future edits, and appends the original audio unchanged.