Edit title, artist, album and more, and add cover art — for MP3, M4A, FLAC, OGG and WAV. Tag one file or a whole batch, entirely in your browser. Nothing is ever uploaded.
Open the Tag Editor
Go to the DefyAudio MP3 Tag Editor — it runs right in your browser, with nothing to install.
Add your audio files
Drag and drop or browse for MP3, M4A, FLAC, OGG or WAV files. Existing tags and cover art are read in automatically.
Edit the tags
Change the title, artist, album, year, genre, track and disc numbers, composer and comment. Add or replace the album art with any JPG or PNG.
Apply to the whole batch (optional)
Copy the artist, album, year, genre or cover to every file at once, auto-number tracks 1…N, and rename files to “{track} - {title}”.
Save and download
Click Save tags. Tags are rewritten losslessly (no re-encoding) on your device — download one file or all of them as a zip.
Add & replace album art
Embed a JPG or PNG cover, read the existing one, or strip it — the top request for “add album art to MP3”.
Batch tag editing
Tag dozens of files in one pass and apply common fields to all of them at once.
Auto-number & rename
Number tracks 1…N automatically and rename files from their tags.
MP3, M4A, FLAC, OGG, WAV
Edit ID3 and container metadata across all the common audio formats.
An audio tag (or ID3 tag) is the metadata stored inside a music file — the title, artist, album, year, genre, track number and cover art your player shows. A tag editor lets you fix messy or missing metadata so your library stays clean and every track shows the right name and artwork.
DefyAudio rewrites only the tag container, never the audio itself, so editing is lossless and instant — an MP3 stays bit-for-bit the same song, just with corrected tags. Because it runs on-device with WebAssembly, your files never leave your computer, and you can tag a whole album in one batch: set the album and artist once, apply them to every track, number them automatically and embed the cover.
Open DefyAudio's MP3 Tag Editor, add your MP3, click Add next to the cover, and choose a JPG or PNG. Click Save tags and download the file — the artwork is embedded losslessly, with no upload.
No. DefyAudio rewrites only the metadata container (the ID3 tag for MP3, or the equivalent for M4A/FLAC/OGG). The audio stream is copied bit-for-bit, so there is zero quality loss and it's near-instant.
MP3, M4A/AAC, FLAC and OGG support full tags and cover art. WAV supports text tags but has no standard for embedded cover art, so the cover option is disabled for WAV.
Yes. Add as many files as you like, then apply the artist, album, year, genre or cover to all of them, auto-number the tracks, and download everything as a zip.
No. All tag editing happens locally in your browser via WebAssembly — your music never leaves your device.