MP3 Cutter & Editor
A free MP3 tag editor that runs in your browser. Fix the title, artist, album, year, genre and track number that your music app and car stereo display, add cover art, and — when you need it — cut a clip out of a track or merge several files into one. Nothing to install, no account required.
Cut & Trim
Extract any segment from an MP3
Merge & Join
Combine multiple MP3 files
Edit Tags
Update ID3 metadata & artwork
Upload MP3 to cut
Drag and drop or click to browse
What ID3 tags are, and why they matter
Every MP3 carries a small block of information about itself called an ID3 tag. It holds the song title, artist, album, release year, genre, track number and — in newer files — the cover art. This metadata is completely separate from the audio: it is the label on the jar, not what is inside it.
Those tags are what your phone, computer and car stereo actually read. Good tags turn a folder of files into a browsable library that sorts cleanly by artist and album; missing tags are why tracks show up as “Unknown Artist,” land in the wrong album, or scatter across your player in no sensible order. Editing the tags fixes all of that without ever touching the sound.
ID3v1 vs ID3v2
There are two generations of the format, and most files you meet use the newer one. The difference matters mainly when a field gets cut off or artwork will not stick:
| Feature | ID3v1 | ID3v2 |
|---|---|---|
| Where it lives | Last 128 bytes of the file | Start of the file |
| Field length | Fixed, ~30 characters each | Long, variable length |
| Album artwork | Not supported | Supported (embedded image) |
| Extra fields | Just the basics | Lyrics, composer, disc number and more |
In short: ID3v1 is a tiny, fixed slot that was fine in the 1990s but truncates long titles and cannot hold a cover image. ID3v2 removed those limits, which is why it is the default today. Many files keep both, so even a very old player still shows something.
Fixing mistagged files and adding cover art
Downloads, ripped CDs and files from friends often arrive with blank or wrong tags. The fix is the same each time: open the Tag Editor tab, drop the file in, and correct the fields. Type the real artist and album so the track stops showing as “Unknown,” set the track number so an album plays in order, and add a genre if you sort by it.
For artwork, attach a square image — 500×500 pixels or larger keeps it crisp on a phone or a car screen. Save the file and re-import it into your library; the new title, artist and cover appear everywhere that reads the file. Because only the tag block is rewritten, you can do this as often as you like with no cumulative damage to the audio.
One honest limitation
Editing tags changes information only. It updates the title, artist, artwork and other metadata — it does not re-encode the audio or change the bitrate, so it can neither improve nor degrade how the file sounds. If a track was recorded at a low quality, better tags will not make it sound better; for that you would need the original, higher-quality source.
Free, and no account needed
There is no signup, no watermark and no cap on how many files you tag, cut or merge. Pick a file, make your changes, and download the result — that is the whole flow.
Last updated: July 2026
Frequently Asked Questions
Everything you need to know