Minify your HTML by removing all the unnecessary characters.
Minify your JS by removing all the unnecessary characters.
Convert text to ascii and the other way for any string input.
Check if the URL is cached or not by Google.
Find A, AAAA, CNAME, MX, NS, TXT, SOA DNS records of a host.
Decode Base64 input to back to string.
Encode any string input to Base64.
Decode Base64 input to an image.