BeneficEdit Audio Metadata
A lossless audio tag editor for FLAC, MP3 files, WAV, DSF, Ogg, Opus, M4A, AAC, ALAC, and AIFF — edit ID3 tags, Vorbis comments, and MP4 iTunes metadata in the browser.
A private, browser-based tag editor for your entire music library. Files never leave your device — the editor runs entirely in the browser, so your tracks stay private and nothing is uploaded. Only the tag information in the container is rewritten; the audio bitstream is untouched, so there is no quality loss when you edit audio metadata with Benefic.
Supported containers
FLAC DSF MP3 WAV Ogg AIFF M4A
Supported codecs
FLAC DSD MP3 PCM Vorbis Opus AAC ALAC
Frequently asked questions
Everything you might wonder about this audio tag editor — ID3 tags, Vorbis comments, MP4 iTunes metadata, album artwork, and more.
What is audio metadata?
Audio metadata is the tag information embedded inside an audio file — song title, artist, album, track number, disc number, year, genre, and album artwork. It is stored in a tag container alongside the audio, so any music player, music apps, DJ software, and music library tools can display and organize your files without scanning the audio itself. ID3 tags in MP3 files, Vorbis comments in FLAC and Ogg, and MP4 iTunes atoms in M4A all carry the same kind of tag information in different containers.
Which audio file formats and audio formats does the tag editor support?
Writable containers: FLAC, DSF, MP3 files, WAV, Ogg (Vorbis and Opus), AIFF, and MP4 (M4A). Writable codecs: FLAC, DSD, MP3, PCM, Vorbis, Opus, AAC, and ALAC. That covers every lossless and lossy audio format you are likely to have in a typical music library.
Which tag formats can Benefic write?
ID3v2.4 for MP3 files, WAV, AIFF, and DSF; Vorbis comments for FLAC, Ogg Vorbis, and Ogg Opus; and MP4 iTunes atoms (ilst) for M4A (AAC / ALAC). When your source file already has older ID3 tags (ID3v2.2 or ID3v2.3), Benefic reads them and rewrites them as ID3v2.4 on save.
Which fields can I edit?
Song title, artist, album, track number, disc number, year, genre, and embedded album artwork (cover art). Other frames or atoms in the source file (ReplayGain tags, MusicBrainz IDs, lyrics, custom text frames, and so on) are preserved on save for MP3 files, WAV, AIFF, DSF, FLAC, and Ogg — see the caveat about MP4 below.
Which ID3 versions are supported?
Benefic reads ID3v2.2, ID3v2.3, and ID3v2.4 ID3 tags and normalizes them to ID3v2.4 on save. ID3v1 (the 128-byte trailer at the end of some older MP3 files) is not read or written — if your file has only an ID3v1 tag, it will import as having no tag, and saving will add a fresh ID3v2.4 tag at the head of the file.
Do my audio files get uploaded to a server?
No. The editor runs entirely in your browser as WebAssembly. Your audio files are read, decoded, and re-written locally — nothing is sent over the network. This makes it safe to use for private or unreleased tracks.
Does editing tags re-encode my audio?
No. Editing metadata only rewrites the tag container — the audio bitstream itself is untouched, so there is no quality loss and no perceptible wait even on large lossless files.
Can I add or replace album artwork and cover art?
Yes. Drag and drop an image onto the cover-art tile (or click it to pick a file) to set new album artwork. JPEG, PNG, and WebP are accepted for album covers. The new image is embedded into the tag container on save and will show up in music apps that read standard ID3, Vorbis, or MP4 artwork. Hit "Remove" on the preview to strip the embedded cover art instead — handy when you want clean album artwork across your music library.
Does Benefic preserve fields it doesn't expose?
For MP3, WAV, AIFF, DSF, FLAC, and Ogg, yes — the tag is read from the source, only the fields you edit are changed, and every other frame or comment is preserved on save. For MP4 (M4A), the ilst atom is rebuilt from scratch on save: the fields above plus existing cover art are preserved, but other atoms (composer, grouping, and similar ilst entries) are not currently carried through.
Is there a file-size limit?
There is no hard cap set by Benefic. Practical limits come from your browser's available memory — modern desktop browsers handle multi-gigabyte lossless files without trouble. Because the tool runs locally, there is no upload bandwidth or rate limiting to worry about.
Does it work offline?
Yes, once the page has loaded. The editor is a static page plus a WebAssembly module — after the first visit it will run without a network connection.
Is the audio tag editor free to use?
Yes. This audio metadata editor is free, requires no account, and has no upload or usage limits — edit ID3 tags on MP3 files, Vorbis comments on FLAC, or MP4 iTunes metadata on M4A for an entire music library in one sitting. Because it runs client-side there is no infrastructure cost to pass on.