Audio Metadata Editor
Processed locally in your browser — nothing is uploaded.
Quick answer
An audio metadata editor changes the tags stored inside a file — title, artist, album, year and genre — without touching the sound. This tool rewrites the ID3 tags on your MP3 (and equivalent tags on other formats) by re-muxing the file losslessly: the audio stream is copied byte-for-byte, so there is no re-encode and no quality loss. It all happens in your browser, and your file is never uploaded.
How to audio metadata editor
Load the file
Drop an MP3 (or other tagged audio) onto the drop zone. Any existing tags are read and shown in editable fields.
Edit the tags
Change the title, artist, album, year, track number and genre. Clear a field to remove that tag entirely.
Save the tagged file
Export. The audio is copied unchanged and only the tag block is rewritten, so the download sounds identical to the original.
What are ID3 tags and why do they matter?
Every MP3 carries a small block of text metadata called an ID3 tag. It is separate from the audio itself — it is what your music app reads to show a track’s title, who performed it, which album it belongs to and its cover art. Get the tags wrong and a library falls apart: tracks show as "Unknown Artist", one album splits into several, songs sort in the wrong order, and search cannot find anything. Fixing the tags is how you make a messy folder of downloads behave like a proper collection.
| Tag | What it controls | Common mistake |
|---|---|---|
| Title | The track name shown in the player | Leftover "Track 01" from a rip |
| Artist | Who performed it; groups the library | "Unknown Artist" scattering songs |
| Album | Which album the track belongs to | Typos splitting one album into two |
| Album Artist | Keeps compilations together | Missing, so each guest artist splits |
| Year | Release year; sorts discographies | Blank or the rip date, not the release |
| Genre | How the track is categorised | Numeric genre codes instead of names |
| Track # | Play order within the album | Missing, so songs shuffle out of order |
Does editing tags change the audio quality?
No — and this is the important part. Editing metadata should never re-encode the sound. This tool re-muxes with a stream copy (the ffmpeg -c copy operation): it takes the existing compressed audio stream and writes it straight into a fresh file with the new tag block attached, without decoding or re-compressing a single sample.
ffmpeg -i input.mp3 -c copy -metadata title="…" -metadata artist="…" output.mp3Do other formats use ID3 too?
ID3 is specifically the MP3 tagging standard. Other formats store the same information in their own way — M4A/AAC uses MP4 atoms, FLAC and OGG use Vorbis comments, WAV uses INFO/RIFF chunks. The concept is identical (title, artist, album as text fields), and the lossless stream-copy approach applies across them. If you need the file in a different container as well as retagged, run it through the audio converter afterwards.
Is my file uploaded to edit its tags?
No. The file is read, the tag block is rewritten and the audio is copied through, all inside your browser with in-browser ffmpeg. Nothing is transmitted — verify it in DevTools → Network, where retagging produces no upload request. That keeps unreleased tracks, private recordings and client masters on your own machine.
Related audio and media tools
To see what a file already declares before you edit, open audio file info. After tagging, convert the audio or compress it if you also need a smaller or different file. Working with spoken-word audio and its captions? You can turn a subtitle file into plain text for the show notes.
Your files never leave your device
Processed locally in your browser — nothing is uploaded. You can verify it yourself: open your browser’s developer tools, watch the Network tab, and use the tool — no upload request is ever made.
Frequently asked questions
Will editing ID3 tags reduce my MP3’s quality?
No. Tags are edited with a lossless stream copy — the audio is written through unchanged and only the metadata block is rewritten. The sound is bit-for-bit identical to the original.
Why do my songs show as "Unknown Artist"?
Because the Artist tag is empty or inconsistent. Set the Artist (and Album Artist for compilations) and the library will group the tracks correctly.
Can I remove a tag completely?
Yes. Clear a field before you export and that tag is written empty, so the player stops showing the old value.
Does this add or change album art?
This editor focuses on the text tags — title, artist, album, year, genre and track number. Cover art is handled by the embedded picture frame, which is a separate part of the tag.
Do the tags I set work in every music player?
Standard ID3v2 tags are read by virtually every modern player and phone. Very old devices may read only the shorter ID3v1 fields, which store the same basics with length limits.
Can I retag M4A or FLAC files, not just MP3?
Yes. Those formats store equivalent metadata (MP4 atoms, Vorbis comments). The same lossless approach applies, so the audio is untouched.
Is my file uploaded to a server?
No. All tag reading and writing happen locally in your browser. You can confirm there is no upload in the Network tab of your developer tools.
Does changing the year fix the sort order of an album?
Year helps sort a discography, but within an album the play order comes from the Track # tag. Set track numbers to fix song order inside an album.