Strip, collapse or prune whitespace six different ways, and see exactly how many characters each pass removes before it touches your text. 6 MODESCHARACTER COUNTSCLIENT-SIDE
How it works: every mode is a counted regex pass, so the panel below reports exactly how many characters (and how many whitespace characters) each pass removed.

Turn a rough ask into a structured prompt with role, task, format, length and rules.

Capitals, spacing, common misspellings, a/an and missing full stops - with a change log.

Convert text to Grade 1 Unicode Braille and back, with capital and number signs handled properly.

Encrypt or decrypt with a repeating keyword, keeping case and leaving spaces and punctuation in place.

A scale ladder from 1 m to the observable universe: how many of a reference object fit.

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.

Enter a due date and map the pregnancy: current week, trimester, days left and a 40-week grid.