Is Text Mesh Pro Free? Can i launch a game with the text?

I just want to know because I want to put a game on Itch.io and I’m using Text Mesh Pro. Its probably a stupid question but I want to know just in case.

Yes, ever since Unity Technologies publishes the asset, you can use it in all projects. Be aware, that not all included resources are free to use though. For example the included fonts may have a different copyright. You can look up the licenses when you download the package or only use your own free fonts.