MP3 ID3 Tag Editor — Edit Title, Artist, Cover Art & Podcast Tags

Edit ID3 tags on MP3 files right in your browser — title, artist, album, cover art, and podcast-specific fields. Batch-tag a whole episode run for free, no upload.

What it does

Load one or more MP3 files and edit the metadata embedded inside them — title, artist, album, album artist, composer, genre, year, track number, and comments — plus cover art and a couple of podcast-specific fields. Nothing is extracted to a server to be re-tagged and sent back; the file is read, edited, and rebuilt entirely in your browser, and the finished MP3 downloads straight from the page.

How it works

MP3 metadata lives in an ID3v2 tag: a small block of structured data prepended to the actual audio, made up of individual “frames” for each piece of information. This tool reads that block directly, decodes the frames it recognizes into the editable fields you see, and — this is the part cheaper taggers often get wrong — keeps every frame it doesn’t have a field for exactly as it found it, byte for byte, so editing the title on a file tagged by another program doesn’t quietly wipe out information from that program. When you save, it writes a fresh ID3v2.3 tag with your changes and reattaches the original audio data completely untouched; the audio itself is never re-encoded.

Cover art uses the same fixed-ratio crop tool as the general-purpose crop tool, locked to a 1:1 aspect ratio, since podcast platforms specifically require square artwork — so you can drop in a rectangular photo and crop it to spec without opening a separate editor first.

How to use it

Add your MP3 file(s) — each one gets its own card showing what tag data it already has.
Edit the fields directly in each card, or use Batch-fill shared fields in the sidebar to fill in things like artist and album once and apply them to every file at once, with optional auto-incrementing track numbers for a multi-episode run.
Set cover art per file, or crop one image once and apply it to the whole batch from the sidebar.
Open Podcast fields on a card if you want to set an episode subtitle, mark it as a podcast episode, or attach a feed URL.
Download each file individually, or grab the whole batch as a zip.

Supported formats

This tool is built specifically around the ID3v2 standard, so it only accepts .mp3 files. It reads both the common ID3v2.3 and newer ID3v2.4 tag versions (and falls back to reading a legacy ID3v1 tag if that’s all a file has), but always writes ID3v2.3 tags for maximum compatibility with players, phones, and podcast apps — with an option to also strip any legacy ID3v1 tag on save if you’d rather not carry it forward.

FAQ

Will this destroy metadata I didn’t touch? No — any tag frame this editor doesn’t expose a field for (things like disc number or an existing custom tag from another program) is carried through unchanged when you save, rather than dropped.

Can I tag a whole podcast season at once? Yes — load all the episode files together, fill in the shared fields (artist, album, cover art, genre) once, turn on auto-numbering for track numbers, and apply it across every file in one click. Per-episode fields like the title stay individually editable.

What image formats work for cover art? Any image your browser can open — JPEG and PNG are the safest choices for compatibility with players and podcast platforms. The tool re-encodes whatever you pick as JPEG on save.

Does this work for M4A/AAC podcast files? No — ID3 is specifically an MP3 tagging standard. M4A files use a completely different metadata format (“atoms”) that this tool doesn’t read or write.

I removed the cover art by mistake — can I get it back? As long as you haven’t saved the file yet, yes — the “Remove cover” button toggles to “Undo remove” and restores whatever was there before.

Why does it say some frames are being “preserved”? That means the original file has tag data this editor doesn’t have a field for. It’s kept exactly as-is in the file you download — you just won’t see it or be able to edit it here.