AudioShell is a free software extension for Windows Explorer that lets users view and edit music file tags of various formats, including MP3, WMA, AAC, MP4, OGG, and FLAC. AudioShell lets users review and personalize metadata directly in Windows Explorer.

One of the most impressive features of AudioShell 2 is its support for all files and tags standards already supported by Tag&Rename - a popular music tag editor. This means that you can easily work with all your music files, regardless of their format or tagging conventions.
Another major benefit of AudioShell 2 is it adds an ID3 tag editor to the Windows system's music files pop-up menu. This allows you to make quick and easy edits to your music metadata without having to open another application.
AudioShell 2’s property shell handler also adds detailed music tags information to Windows Explorer columns and preview pane, so you can easily see all the relevant information about your music files at a glance. The thumbnail handler, on the other hand, adds thumbnails with album art to Explorer, making it even easier to find and identify your music files.
Finally, it's worth mentioning that AudioShell 2 offers full Unicode and 64-bit support, which ensures smooth and efficient operation, even with larger music collections. While it may not be the most robust music management software out there, for a freeware extension, AudioShell 2 is an excellent option worth checking out.
Version 2.3.6: fixed bug in ID3v2.4 Unicode tags support
Version 2.3.4:
added support for Xtra atom in mp4 files (this atom used by Windows Explorer and Windows Media Player)
minor fixes
Version 2.3.3: fixed bug in mp4 files support on 64bit systems
Version 2.3.1: fixed bug in ID3v2 tag removing from mp3 files
Version 2.3:
added Opus files support
added "Retry" button to tag saving error message, so it is now possible to retry tag saving if file is locked by another application
fixed bug in flac support when flac file is not reduced even with very big padding
minor fixes
Version 2.2:
added check for updates function
added support for DSD256
fixed bug in big wav files support
fixed bug in mp4 files support
minor fixes and improvements
Version 2.1:
added support for TRACKTOTAL and DISCTOTAL tag frames in Vorbis Comments (ogg/flac) tags
fixed Comments column support in Windows Explorer
Version 1.3 beta 1:
-added Chinese Simplified (thanks to LordFox), French (thanks to Philippe Taouville), German (thanks to Harald Sturm) and Italian (thanks to Marco D'Amato) translations
-redesigned music files properties tabs
-added support for UTF8 encoded ID3v2.4 tags
-many minor fixes and improovements
Version 1.2:
added support for cover art in APE tags
now AudioShell "Information" and "Tag Editor" tabs work in Windows 98 and Me
fixed bug in mp4 files support - old version can corrupt some mp4 video files while editing tags
a lot of minor improvements
Version 1.1:
added support for ID3v1 tags (now AudioShell show ID3v1 tag info if file don't contain ID3v2 or APE tag)
improved tags reading/writing functions