id3 mass tagger is a tool for manipulating ID3 and ID3v2 tags in multiple files. It can generate tag fields from the filename and other variables, and/or rename files, using an intuitive syntax. id3 currently supports the old-style ID3 format with track-number extension (ID3 v1.1), as well as the more complicated ID3v2 (ID3 v2.2.0, v2.3.0) format. The program uses non standard licence.