ID3 Tag Editor

About ID3 Tag Editor

Audio files carry metadata tags separately from the actual sound data — title, artist, album, and year fields that music players and file managers display, often filled in incorrectly, left blank, or inherited from a generic default when a file is exported from somewhere. This tool reads and lets you rewrite these tags directly.

A real FFmpeg build compiled to WebAssembly writes the tags entirely inside your browser using FFmpeg's metadata options, and critically, does this with stream copy (-c copy) rather than re-encoding the audio — only the metadata block changes, so quality and file size stay exactly the same as the original.

Only the fields you actually fill in get written — leaving a field blank means it simply isn't set on the output, rather than being forced to an empty explicit value, giving you control over exactly which tags to touch.

This works on whatever audio format you upload, since the metadata tagging conventions vary by container format but FFmpeg handles the appropriate tag format automatically for the file type involved, whether that's ID3 tags for MP3 or the equivalent metadata structure for other formats.

How it works

1. Upload your audio file. The file loads into the browser-based FFmpeg engine.
2. Fill in the tag fields. Title, artist, album, and year — leave any blank to skip it.
3. Save and download. Tags update with zero change to audio quality or file size.