123Tag is a comprehensive software application that enables users to edit tags and rename audio files, as long as they have the MP3 or MP4 format. It caters to all users who want to organize their music collection and manage playlists as well.

After a brief and uneventful setup procedure that doesn't require special input, you are greeted by a standard window, where you can use the Explorer-based folder structure to navigate directories and select files with the aforementioned extensions.

The options may seem cluttered at a first glance, but 123Tag is actually pretty easy to work with. You can select multiple items to process at the same time, such as assigning automatic numbers, or copying or moving them to a different location.

When it comes to tags, you can create or edit the title, artist, album, year, publisher, description and other important fields of a song. As we have said before, it is possible to rename files or add them to a playlist.

A different section of 123Tag enable the tool to automatically search for existing music files on your computer, in order to put together a catalog and keep track of your favorite songs. You can find duplicates and remove them to free up space on the disk, generate lists and export or print them for further scrutiny, as well as load songs in a built-in media player, among other useful options.

123Tag uses a low-to-moderate quantity of CPU and RAM, so it shouldn't be a concern to the computer's overall performance. It has a good response time to commands and works smoothly, without causing the OS to hang, crash or pop up error dialogs. Aside from some needed improvements in the visual department of the GUI, 123Tag should satisfy the entire audience.