Edit MP3 tags in your browser
Fix the title, artist, album, year, track number, genre, comment and cover art of an MP3 file. Nothing is uploaded. The file is read and rewritten on your own device.
Drop an MP3 here
or
You can drop another file at any time. The form refills with whatever that file has inside.
MP3 files only. Nothing to practise on? Download a 15-second sample MP3 that already carries a tag, change it, and open the result in your player. New here? Read how it works.
How it works
- Drop an MP3 into the box, or pick one with the file chooser.
- The existing tag is read on your device and the form fills in with what's already there.
- Change what you like. Add, replace or remove the cover image.
- Click Save tags and download. A fresh copy of the file is written with an ID3v2.3 tag, plus an ID3v1 tag if you left the box ticked. The original is untouched.
The audio itself is copied byte for byte. Only the tag block at the front of the file changes, so there's no loss of quality, and the new file plays exactly as before.
What it writes, exactly
The editor writes an ID3v2.3 tag with text stored as UTF-16, so Hindi, Tamil, Arabic, Cyrillic and Japanese titles survive. Each form field goes into one frame:
| Field | ID3v2.3 frame | In the ID3v1 copy |
|---|---|---|
| Title, Artist, Album | TIT2, TPE1, TALB | first 30 characters, ASCII only |
| Year | TYER | 4 digits |
| Track # | TRCK (3 or 3/12) | the number, 1 to 255 |
| Genre | TCON, written as the name | one-byte code |
| Comment | COMM | first 28 characters |
| Cover art | APIC, front cover | not possible in ID3v1 |
Fields the form doesn't show (album artist, composer, disc number, lyrics, BPM) are not carried over. If a file has those and you need to keep them, use a desktop tagger for that file. More on the fields.
Guides
Short, practical pieces on the problems that bring people here: albums that split in two, cover art that won't show, titles that turn into question marks. Written from fixing my own library, with real files and real numbers.
- What's actually inside an MP3 tag: ID3v1, ID3v2.3 and ID3v2.4 in hex
The bytes of a real tag, front and back of the file, with each part explained. Why 2.3 is still the default.
- "Unknown artist", "Unknown album": why your MP3s show that and how to fix it
No tag, an old tag, a stale cache, a version the player can't read, or the wrong field: how to tell which and fix it.
- Title, Artist, Album Artist, Composer: which MP3 tag field does what
What each field is for, why Album Artist matters more than you'd think, and which ones you can safely leave blank.
- Hindi, Tamil, Arabic or Russian song titles showing as ???? or garbage: the encoding fix
Where the question marks come from (an encoding byte, an ID3v1 tag, or an old codepage) and the one-step fix.
- How big should MP3 cover art be? I measured what each size adds to the file
JPEG vs PNG, 300 to 3000 pixels, measured on a real file. Where the sensible size is and why PNG is usually a mistake for photos.
- Album art not showing on Windows, iPhone, Android or in the car: every cause, in order
The seven reasons a cover you definitely embedded still won't appear, in the order to check them.
Questions people ask
Do you upload my MP3 anywhere?
No. The file is read and rewritten by JavaScript running in your browser. You can check: load the page, switch off Wi-Fi, and the editor still works. There's no server-side code on this site at all.
Does editing the tag change the sound?
No. The audio frames are copied unchanged. Only the tag block at the start of the file (and the 128-byte block at the end, if you keep ID3v1) is rewritten.
Why is the saved file a different size?
Text costs about two bytes per character, so that's a few hundred bytes at most. Cover art is the real weight: in my tests a 600-pixel JPEG added about 39 KB and a 1000-pixel one about 78 KB. Sizes and what to pick.
Which tag version does it write, and why not ID3v2.4?
ID3v2.3, with an optional ID3v1.1 copy at the end of the file. Version 2.3 is what nearly every tagger writes by default because older Windows software and most car stereos read it reliably, and 2.4 support is patchier. What the versions look like inside the file.
Can I edit a whole folder at once?
Not here. This is a one-file-at-a-time tool by design. For a whole album or library, use a desktop batch tagger. Which one, and when.
Does it work on a phone?
Yes. Tap Choose a file, pick the MP3, edit, then Save. On iPhone the new file lands in the Files app under Downloads; on Android it goes to your Downloads folder.
My player still shows the old title. Why?
Most players cache what they read the first time. Remove the track from the library and add the new file, or clear the app's cache. The full list of caches and how to clear them.
Who makes this
editmp3tags.com is built and looked after by Saurav Kumar Sharma, a software developer who makes small, single-purpose web tools. There's no company behind it and nothing to sign up for. It's free, and to stay free it may carry advertising. More about the site, or write to thegeekpagesite@gmail.com.