Random Case Converter - Online RaNdOm CaSe Text

A Random Case Converter transforms regular text by randomly changing each letter to either uppercase or lowercase, creating a mixed‑case effect (often known as "SpongeBob text" or "MoCkInG tExT"). Adjust the uppercase probability slider to control how often letters become capitalized.

The slider sets the likelihood that any given letter will be converted to uppercase. For example, at 50% each letter has an equal chance of being upper or lower case. At 80% most letters will be uppercase, while at 20% most will be lowercase.

Yes! Simply click the "Convert" button again to apply a new random casing based on the current probability setting. Each click produces a unique outcome.

Absolutely. All processing happens directly in your browser. No data is ever sent to any server or stored online.

The converter only affects letters from the Latin alphabet (A–Z, a–z). All other characters, including numbers, punctuation, and letters from other scripts, remain unchanged.