The online edition of the Thesaurus Linguae Latinae provides access to the contents of all lexicon articles published up to 2008 (that is the letters A–M, O, P–pomifer, porta–pulso), the articles in the Onomasticon volumes (letters C and D), the Index librorum and the Praemonenda de rationibus et usu operis, a multilingual introduction to the printed version of the Thesaurus. The content of TTL online is thus identical to that of the printed version of the Thesaurus. Each year the contents of the newly printed fascicles will be added to the database.

Each year, the database is extended by the texts of the newly printed Latin editions of the Bibliotheca Teubneriana.