Cry$\pi$tographer

This tool finds where a specific number/string appears in the digits of $\pi$:

This tool does the opposite and gives you the digits of $\pi$ at a specific position:

Although JavaScript has arbitrary precision arithmetic in form of the BigInt for practical purposes BigInt is limited by most JS-engines. Hence it might happen this tool stops working at some point depending on your browser.

If you want to know more about this and especially how it works including how $\pi$ is calculated you find more information and Python code to run it for yourself without the limitation of JavaScript here.