We don't have synonyms for legalizer yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are legalize, legalized and legalizes.
(n) :
(computing) A tool that takes invalid input and creates valid output, such as for chip placement to move digital standard cell gates into legal positions.
(n) :
(computing) A tool that takes invalid input and creates valid output, such as for chip placement to move digital standard cell gates into legal positions.