Most sources distribute MCL Mangai as freeware . However, for 100% legal safety in commercial projects (logos, product packaging, paid publications), contact the original distributor (Murasu Computer Land) or use an open-source alternative like "Noto Sans Tamil." For personal and educational use, it is universally free.
Note: MCL Mangai is a desktop TTF. For mobile, you usually need apps that support custom fonts (like Canva, MS Word mobile, or specific Tamil keyboard apps). mcl mangai tamil font download free better