Mp3tag is a powerful and yet easy-to-use tool to edit metadata of common audio formats where it supports ID3v1, ID3v2.3, ID3v2.4, iTunes MP4, WMA, Vorbis Comments and APE Tags.

It can rename files based on the tag information, replace characters or words from tags and filenames, import/export tag information, create playlists and more.

Mp3tag supports online freedb database lookups for selected files, allowing you to automatically gather proper tag information for select files or CDs.

Mp3tag supports the following audio formats :

- Advanced Audio Coding (aac)
- Free Lossless Audio Codec (flac)
- Monkey's Audio (ape)
- Mpeg Layer 3 (mp3)
- MPEG-4 (mp4 / m4a / m4b / iTunes compatible)
- Musepack (mpc)
- Ogg Vorbis (ogg)
- OptimFROG (ofr)
- OptimFROG DualStream (ofs)
- Speex (spx)
- Tom's Audio Kompressor (tak)
- True Audio (tta)
- Windows Media Audio (wma)
- WavPack (wv)

Main featues of Mp3tag :

- Batch Tag Editing Write ID3v1.1, ID3v2.3, ID3v2.4, MP4, WMA, APEv2 Tags and Vorbis Comments to multiple files at once.
- Support for Cover Art Download and add album covers to your files and make your library even more shiny.
- Import from Amazon, discogs, freedb, MusicBrainz Save typing and import tags from online databases like Amazon, discogs, freedb, MusicBrainz, and more.
- Replace characters or words Replace strings in tags and filenames (with support for Regular Expressions).
- Create Playlists automatically Create and manage playlists automatically while editing.
- Rename files from tags Rename files based on the tag information and import tags from filenames.
- Export to HTML, RTF, CSV Generate nice reports and lists of your collection based on user-defined templates.
- Full Unicode Support User-interface and tagging are fully Unicode compliant.
- Besides these main features Mp3tag offers a variety of other functions and features ranging ranging from batch export of embedded album covers, over support for iTunes-specific tags like media type or TV Show settings, to combining multiple actions into groups that can be applied with a single mouse click.

Changes in Mp3tag 2.46b :

- NEW: added German help file (many thanks to dano!).
- NEW: added support for setting cover type for multiple different covers at once.
- NEW: edit user-defined tool dialog is resizable now.
- NEW: file list columns can now be rearranged via drag'n'drop.
- CHG: added workaround for an issue when displaying the extended tag dialog under Wine 1.3.
- CHG: changed format of %_replaygain_track_gain% and %_replaygain_album_gain% for Musepack to difference values.
- CHG: DATE is not automatically mapped to ID3v2.4 TDRC frame anymore.
- CHG: file path of the currently selected file now displayed at caption of extended tag dialog.
- CHG: minor changes in default genre list.
- CHG: updated discogs tag source.
- CHG: updated discogs web source.
- CHG: updated MusicBrainz tag source.
- FIX: closing filter window when in floating state did not reset file view.
- FIX: deadlock on files with malformed ID3v2 tags.
- FIX: filter IS and HAS did not handle umlauts in uppercase correctly.
- FIX: moving file where file already exists in target resulted in duplicate entries in file list.
- FIX: replace did not work in web source scripts if replacement was part of sequence to be found.
- FIX: undesired behaviour when renaming _DIRECTORY through action 'Format value' with a format string resulting in an empty value.

Changes in Mp3tag 2.46 :

- FIX: iTunes-specific field Encoding Params was not preserved.
- FIX: saving tags to files on some NAS drives occasionally did not work.
- FIX: blanks before extension part in file names were automatically removed at Replace actions for _FILENAME.
- CHG: multiple Source fields mapped to same Target field are now merged if they have the same values.
- NEW: added dedicated help page for User-defined Field Mappings.
- FIX: first file deleted from filter results returned to list on filter refresh.
- FIX: omitted slash character when used at user-defined field mappings.
- FIX: focus not moved to file list when closing Tag Panel.
- FIX: update notification also reported beta versions when using latest stable release (since v2.45a).
- FIX: keyboard shortcuts for tools Ctrl+1 to Ctrl+0 did not work anymore (since v2.45c).
- NEW: Shift key modifier option at 'Remove from history' menu items that empties history.
- FIX: shell extension did not resolve symbolic links.
- CHG: improved copy and paste of tags to multiple files.
- CHG: performance improvements for MATCHES keyword when filtering using regular expressions.
- FIX: $validate removed colons in directory part of parameter instead of using replacement character.
- NEW: added Ctrl+Space keyboard shortcut for displaying format string helper menu.
- FIX: runtime error when clicking the actions drop-down menu after deleting all action groups.
- FIX: tag field mappings did not work for APEv2 tagged files.
- FIX: shell extension did not load directories with dots in their names.
- NEW: support for %_md5audio% for FLAC files.
- CHG: dockbar information now always stored in configuration file.
- NEW: Explorer context menu entry now realised via dedicated shell extension.
- FIX: placeholder %_md5audio% now only available for audio formats tagged with ID3 and/or APE tags.
- FIX: placeholder %_counter% was not available at action 'Export cover to file'.
- NEW: placeholder %_tool% for TAK now contains used TAK encoder version.
- CHG: extended profile information displayed in %_vbr% for TAK files.
- CHG: updated TAK decoder library tak_deco_lib.dll to TAK 2.0.0.
- CHG: user-defined fields are not truncated to 255 characters in MP4 anymore.
- CHG: now displays technical information of the first audio track in MP4 (instead of the first track).
- FIX: menu 'Edit, Select all files' only worked if file list had focus.
- FIX: sort indicator in file view was not reset if playlists were loaded or files were added.
- FIX: removing files from filter result caused files that do not match the filter expression to be displayed.
- CHG: COPYRIGHT field now maps to MP4 cprt atom.
- NEW: added field PRESENT keyword to filter for files that contain a specific field in their tags.
- NEW: support for reordering files via drag and drop at Tag Sources dialog.
- CHG: adjusted MP4 mediatype mappings to reflect changes in iTunes 9.
- CHG: SUBTITLE at MP4 now contains what previously was ITUNESPODCASTDESC which now contains the long description.
- FIX: workaround for MP4 files with unconventional avcC atoms.
- CHG: updated discogs web source.
- FIX: runtime error when sorting files after filtering with an invalid filter expression.
- CHG: file extension is now not selected when renaming files in file list.
- CHG: Tag Sources selection dialog now remembers its selection state and sorting of search results.