Allow everything, block everything, or write per-path rules — with the syntax handled, a sitemap reference where it belongs, and one switch that opts out of the AI training crawlers by name. Built locally, downloaded as the file that goes at your domain root.
Your robots.txt
User-agent: * Disallow:
Upload it to the ROOT of the domain — https://example.com/robots.txt, never a subfolder.
Set what you want and the result appears as you go. Nothing needs uploading because there is nothing to upload — you are describing what to make, not sending us anything.
Your browser does all the work locally, using your own operating system where randomness is involved. Nothing is requested from a server, so nobody else has a copy of what you made.
Take the result to your clipboard, or save it as a file. Nothing is kept — refresh the page and it’s gone, so take what you need before you leave.