A robots.txt generator is a tool that creates a robots.txt file for a website. The robots.txt file is a simple text file that is placed in the root directory of a website and tells search engine crawlers which pages or sections of the website should not be indexed. This can be useful for preventing search engines from indexing pages that are not intended for public consumption, such as login pages or pages that contain sensitive information. Some website-building platforms, like WordPress, have built-in robots.txt generator. There are also a number of free online robots.txt generators available.