The Text Tonsorium designs and enacts workflows that fulfil your goal. Here, the goal is set to "lemmatization of the input". Once in Text Tonsorium, you can refine or change the goal.
The LiLa Text Linker is a pos-tagger and Lemmatizer for Latin that also provides, for each analyzed token, a link to the lemma entry in the LOD-compliant LiLa Lemma Bank. The tool was produced in the context of the 'LiLa - Linking Latin' project (https://lila-erc.eu/).