ID3 Tag Editor
Edit an MP3's ID3 tags: title, artist, album, genre and year. Fix a track that shows up as Unknown Artist.
Runs entirely in your browser — your files and text never leave your device.
Drag & drop your file here, or
How to use
- Choose the MP3. The fields unlock once its current tags have been read, with each one already filled in.
- Fix the fields that are wrong. Year is digits only, four at most, and anything else gets refused when you save. Clearing a box removes that tag from the copy.
- Save tags & download writes the file out as name-tagged.mp3, with the audio copied across untouched.
About this tool
A track filed under "Unknown Artist" normally has perfectly good audio and an empty tag, which is the thing an ID3 tag editor fixes. Load the MP3 and five boxes fill with whatever is already in the file: Title, Artist, Album, Genre, Year. Type over what is wrong. Reading is done by jsmediatags, and if it finds no tag at all you get a short note plus five empty boxes to start from.
Saving rewrites the tag instead of patching it. browser-id3-writer lifts the whole ID3v2 block off the front of the file, writes a fresh one holding those five frames, then copies the audio in behind it byte for byte. Emptying a box is how you delete a tag, since blank boxes are skipped when the new tag gets built.
There is a cost to that, worth knowing before you press save. Anything the old tag carried that these five boxes don't cover won't survive the round trip. Embedded cover art is the obvious casualty. Track number, album artist, comments, lyrics: same story. For a file whose artwork you care about, a desktop tagger like Mp3tag or MusicBrainz Picard is the safer choice.
If the file isn't an MP3 yet, the Audio Converter comes first. Trimming is Audio Cutter's job and stitching two together is Audio Joiner's. Tagging is worth doing last, once the audio is final.
Before you rely on it
- Only those five frames get written. Cover art and everything else the old tag held goes missing from the saved copy, because the writer replaces the tag rather than editing it in place.
- MP3 only. The picker takes audio/mpeg and .mp3; M4A and FLAC keep their metadata in a different container, so those want converting first if ID3 is what you're after.
- One track per pass. A whole album means one trip through the form per file, which gets old around track four. Bulk retagging wants a desktop app.
- Genre is a plain text box and goes in exactly as typed. Tag one track Hip-Hop and another hip hop, and a library that groups by genre will file them apart.
Frequently asked questions
What are ID3 tags?
The block of metadata sitting at the front of an MP3: title, artist, album, year, track number, genre, cover art. Players read it to build the artist and album lists you browse, which is why a sensibly named file can still show up as nothing useful in a music app.
Why is my player still showing the old title?
Most players cache metadata when they first scan a folder and won't reread it unless you make them. Pull the track out of the library and add it back, or trigger a rescan. The file on disk already carries the new tag, which you can confirm by loading it back into this page.
Can I add album art?
Not with this. There is no artwork field here, and saving actually removes art that was already embedded, so skip it for files whose covers matter. Mp3tag on Windows and MusicBrainz Picard on any platform both handle artwork properly.
What happens if I clear the Album box and save?
The album frame is left out of the new tag, so it disappears from the copy. That is how you strip a wrong value rather than overwrite it, which comes in handy for podcast episodes that arrive labelled with somebody else's album name.
Does saving cost any audio quality?
No. Nothing is decoded or re-encoded. The MP3 frames are copied straight through and only the tag in front of them is rebuilt, which is why the saved file comes out roughly 4 KB bigger, from the padding the writer leaves behind.
It says no ID3 tags found. Is the file broken?
Usually not. Plenty of MP3s ship with no tag at all, especially rips and voice recordings, and you get blank boxes to fill in from scratch. If the same message shows up for a file you know is tagged, check that it really is an MP3 and not an M4A wearing an .mp3 name.
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