Free tool
ID3 Tag Editor — online, in your browser
Open one file or a whole album, edit title, artist, album, year and cover art, and download the freshly tagged copies — MP3 and FLAC both save. Free, no account, no install, and your files never leave your device.
Everything runs locally in your browser: the audio never leaves your device, and saving produces fresh copies — your original files are untouched.
Why an online ID3 tag editor?
The classic tag editors — Mp3tag, Kid3, MusicBrainz Picard — are excellent desktop software, but installing an app is overkill when you just need to fix one mislabeled track, correct a year, or drop proper cover art into a file someone sent you. This tag editor does that job in the browser — open, edit, save, done, one file or a whole album, MP3 or FLAC. Because it has no backend, it is also the private option — nothing to upload, nothing queued behind someone else's server, and it works offline once loaded.
What clean tags get you
Every player builds its library from tags. Wrong artist spellings split one artist into three; a missing album artist scatters compilations; absent covers leave gray squares on your CarPlay screen. Five minutes of tag hygiene is the cheapest upgrade a local music library can get — and it benefits every device at once, including players like Trove that read tags and artwork straight from your files.
How to edit ID3 tags — step by step
- Open the files. Drop one file onto the editor above, or a whole album — MP3 or FLAC, up to 200 at a time. Current tags and cover art load instantly, nothing is uploaded.
- Fix the fields. Title, artist, album, album artist, year, track number, genre — edit any of them. With several files open, the album-wide fields can be filled once and applied to all of them. Album artist is the one people miss: it's what keeps compilations together in every player.
- Sort the cover. Click “Replace cover…” and pick a JPG or PNG — square images look best.
- Save. Press Save and the freshly tagged copies download — one file on its own, several as a zip. Your original files are never modified.
That's the entire workflow. Editing ID3 tags doesn't need an account, an install or a manual — it needs thirty seconds.
Online MP3 tag editor vs desktop tag software
An online tag editor and desktop ID3 tag software solve different sizes of the same problem. This page covers everything up to an album or two: the mislabeled track a friend sent you, a wrong year, a missing cover, or a freshly ripped album that needs one artist and year across every track — open, fix, done, on any computer including one that isn't yours. For a whole library in one pass, automatic lookups from acoustic fingerprints, or filename-from-tag renaming rules, install a desktop tagger: Mp3tag and MusicBrainz Picard are the reference picks, and both are free. The trade-off runs the other way too — they're overkill for a single file, and your music has to live on the machine they're installed on.
ID3v1, ID3v2.3, ID3v2.4 — which version matters?
ID3v1 is the 1996 original: 128 bytes bolted to the end of the file, 30-character fields, no cover art — historically important, practically obsolete. ID3v2.3 is the compatibility king: every player shipped this century reads it, embedded cover art (APIC frames) included, which is exactly why this editor writes it. ID3v2.4 is newer on paper — UTF-8 everywhere, multiple values per field — but mainstream software has been slow to love it, and some players still read v2.3 more reliably. Unless a specific app demands v2.4, v2.3 is the safe answer. The full specifications live at id3.org if you enjoy that sort of thing. FLAC does not use ID3 at all — it carries Vorbis comments, a simple list of NAME=value pairs, plus a dedicated block for cover art. That is what this editor writes when you save a FLAC, which is why the same seven fields work across both formats.
ID3 tag editing FAQ
Versions, formats, covers and safety, answered.
How do I edit ID3 tags online?
Drop one MP3 onto the editor above, or a whole album at once. Current tags and cover load instantly; change any field, replace the cover if you like, and press Save. A single file downloads as a freshly tagged copy, several come back as a zip — your original files stay untouched.
Is this ID3 tag editor really free and private?
Yes on both counts. There is no account, no watermark and no server: the MP3 is read and rewritten entirely inside your browser, so your music never leaves your device.
Which tag version does it write?
For MP3, ID3v2.3 — the version with the widest player support, including iTunes/Apple Music, Windows, Android and every serious desktop player, with cover art in an APIC frame. For FLAC, Vorbis comments (TITLE, ARTIST, ALBUM, ALBUMARTIST, DATE, TRACKNUMBER, GENRE) plus the file's own PICTURE block for artwork. Either way the same seven fields are written.
Can it edit FLAC or M4A tags?
FLAC yes, M4A not yet. FLAC tags are written as Vorbis comments, the format's own tagging scheme, and the audio stream is copied through untouched — the decoded audio checksum of a saved file matches the original exactly. M4A and OGG still open in read-only mode: you can inspect their tags and extract the cover, but not save changes.
How do I change the album cover of an MP3?
Open the MP3, click 'Replace cover…' and choose a JPG or PNG — ideally a square one. Need a high-resolution cover first? Grab one with our Album Art Finder, which downloads official artwork up to 3000×3000.
Will editing tags re-encode or damage the audio?
No. Tags live in a separate block before the audio stream; the editor replaces that block and copies the audio bytes through untouched, so there is zero quality loss. For FLAC this is checkable: every file carries a checksum of its decoded audio, and a file saved here still reports the same one as the original.
What's the best free ID3 tagger?
Depends on the job size. For a track or an album right now: this page — no install, no upload, no account, up to 200 files at a time. For a whole library in one pass, with filename rules and acoustic-fingerprint lookups: desktop tag software like Mp3tag or MusicBrainz Picard, both free. There is no single 'best', only the right size of tool.
Can I batch edit ID3 tags here?
Yes — drop a whole album in, MP3 or FLAC. Artist, album, album artist, year and genre can be filled once and applied to every selected file, while title and track number stay per-track. Up to 200 files at a time (about 3 GB), and the tagged copies come back as a single zip. For retagging an entire library in one pass, desktop software with folder support (Mp3tag, Picard) is still the bigger tool.
Tags fixed? Give them a player that respects them
Trove Player for Mac, iPhone, iPad and Apple Watch organizes your library straight from your tags — FLAC, ALAC, DSD, NAS streaming, synced lyrics. Free, one-time Pro purchase, never a subscription.
More free tools: Add Album Art to MP3 · Extract Album Art · Album Art Finder · LRC Maker
Guides from our blog: FLAC vs ALAC — how tags differ between the two · Swinsian alternatives for Mac — players with real tag editing