Convert colours three ways with a live preview.
Strong random passwords from crypto.getRandomValues.
Live Markdown preview rendered in the browser.
Convert delimited text and JSON both ways.
Draw random whole numbers in any range, with unique and sorted modes and a cryptographic source.
Convert 1-3999 both ways, see how each numeral adds up and catch non-standard forms like IIII.
Test any number for primality with Miller-Rabin, then get its prime factorisation and every divisor.
Mean, median, mode, quartiles, range and standard deviation for any list of numbers.
