ip echo - Show request headers and source IP of your request, similar to ipchicken.com
Hashes&Encodes - Hash to SHA1/256/512/MD5 and convert base64/hex/binary locally in JS
Prettyprint JSON - Prints out JSON in a pretty,colored format
verify lua - Tells you lua syntax errors and, if none found, minifies your code
JWT Print - Prints out a JWT token in a readable manner
ASCII Codes - Cheatsheet about ASCII (no extended)
Contrast ratio - Calculate contrast ratio of 2 colors for readability purposes
List of colors - Color list with CSS names
RFC Searcher(external) - Search for RFCs with keywords