Check a phrase or a number as a palindrome with case, punctuation, spaces and accents optionally ignored. Shows every mirrored character pair, the first mismatch, and the longest palindromic substring. MIRROR MAP SUBSTRING NORMALISE

Twelve working mock interfaces that demonstrate real manipulative design patterns, each with its ethical counterpoint.

Enter a year and see which notable people from a curated roster were alive at that moment.

Scrub 2000 to 2100 and read world population, CO2 ppm and the temperature anomaly, plotted.

Strip stopwords, rank what is left, chart word density and find repeated bigrams.

NWS wind chill at 50 F or below with 3 mph or more, clamped to the air temperature whenever the formula runs warm, and the Rothfusz heat index at 80 F or above with 40% RH or more. Outside both windows it says so.

The barometric formula reading an altitude straight off a pressure, beside the hypsometric equation turning a known height change and temperature into the pressure you should expect to read there.

Water intake, urine volume, urinary calcium and urinary oxalate scored 0-100 with each factor's points and the arithmetic shown, so you can see which input moved the number. An educational estimate, not medical advice.

Convert between Mw, mb, Ms and ML with the published linear relations, then read the radiated energy in joules and in tonnes of TNT.