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I realized everyone I knew who played wordle usually solved the daily challenge in 3-4 guesses, and then discoverd the average globally is in fact 3.8. I then found some people actually wrote programs to systematically solve wordle and were barely able to reach an average under 3.7. I set out to make a more difficult word game in a somewhat similar style and FourWord is what I came up with. Remember: It is meant to be more difficult!

Validating email addresses is much more difficult than one would think until they have attempted to do so. Over the last 10 years or so anytime I have the need I consult this page first.

Turn any phrase into the classic table-flip ASCII emoticon — express your frustration and flip what's bothering you!

Encode plain text into Base64 or decode Base64 strings back into readable UTF-8 text.

Test regular expressions against sample text with support for JavaScript, PCRE, grep BRE, grep ERE, Python, and POSIX-style flavors, plus notes on which languages use which implementation.