Many communities have been using their own solutions for it for a while (e.g pylint / pep8 if you've used Python, clang-format for C++, js-beautify for javascript, etc) and many companies use "linter as style enforcer" but you still need to watch out for some things that linters don't catch in most languages.

FWIW if you use vim, this plugin is great: https://github.com/google/vim-codefmt