Text Case Converter

Turn any text into UPPERCASE, lowercase, Start Case, Sentence case, reversed, trimmed or spaceless — instantly.

Your text

UPPERCASEHELLO WORLD! THE QUICK BROWN FOX JUMPS OVER 13 LAZY DOGS.

lowercasehello world! the quick brown fox jumps over 13 lazy dogs.

Start Case (Every Word)Hello World! The Quick Brown Fox Jumps Over 13 Lazy Dogs.

sentence caseHello world! The quick brown fox jumps over 13 lazy dogs.

Reversed text.sgod yzal 31 revo spmuj xof nworb kciuq ehT !dlroW olleH

Trimmed (no edge spaces)Hello World! The quick brown fox jumps over 13 lazy dogs.

No spaces at allHelloWorld!Thequickbrownfoxjumpsover13lazydogs.

What is it

Text case is about which letters are big and which are small. A converter applies one rule to your whole text at once: raise every letter, lower every letter, capitalize the first letter of each word, or fix only sentence starts — plus extras like reversing the characters and stripping spaces so the result fits a URL or a filename.

Notes & fun facts

Programming languages are picky about case: Python convention wants function_names in snake_case, JavaScript prefers camelCase, and Java keeps ClassNames in PascalCase. Get it wrong and the code still runs — it just makes every teammate wince. That is why case converters live in every developer’s bookmark bar.

Origin & history

Movable type in the 15th century forced printers to split letters into two drawers: capitals (the upper case) and small letters (the lower case). Those names stuck. The modern convention of starting sentences with a capital spread with the first printed Bibles and grammars in the 16th century; camelCase as a naming style is generally traced to the 1970s programming community.