Nice site – CyberChef – which allows you to do all sorts of conversions of data format, generate encoding and encryption, parse network data, extract strings, IPs, email addresses, etc., analyze hashes and a lot more.
A really useful page and it allows you to do a lot of things real quickly. It’s really well designed and there is (as you can see on the screenshot) on the top left side a search function to find the functions more easier.
Another good page I also want to mention in this short article here is WolframAlpha, which can solve and answer almost every question related to phyiscs, math or
Both pages also can be used offline – you can download their database to use it on the go.
Be the math pr0n be with ya!