Case Converter

UPPERCASE and lowercase are the simplest of the six styles, converting every letter regardless of position. Title Case here capitalizes the first letter of every word, which is a common simplified approach; formal style guides like AP and Chicago instead lowercase short articles, conjunctions and prepositions (a, an, the, and, of, in) unless they open or close the title, so a strict Title Case check against those guides may still need a manual pass. Sentence case capitalizes only the first letter of the whole string and lowercases the rest.

camelCase and snake_case come from programming conventions rather than prose. camelCase removes spaces and capitalizes the first letter of every word after the first, producing names like readingTime, while snake_case removes spaces and joins words with underscores in all lowercase, producing reading_time. Both are used for variable, function and file naming where spaces aren't allowed.

This makes the tool useful for two very different jobs: reformatting a heading or block of prose between casing styles, and converting a plain-English label into a valid variable name for code. Switching between all six from one input means you don't need separate tools for writing tasks and coding tasks.