I recently discovered a way to make perfect circles in Minecraft minecraftcirclegenerate.com, which is really helpful since the game is mostly about blocks and squares. But I'm not sure if using online tools to help with this is okay. Some of my friends say it might be cheating because it makes things easier. I couldn't find clear rules about it online.

Is it alright to use online mc circle generator for Minecraft, or could that be against the game's rules? I just want to make sure I'm playing fairly and not breaking any rules.

P.S.: My friends are using websites to make circles and they haven't had any problems.