Inverse Case Converter

Switch cased letters to their opposite case locally using locale-aware browser mappings where available.

Input

LocaleInverted case

Case conversion is mechanical. Locale-aware upper/lower mappings are used where the browser supports them; natural-language title capitalization and proper-noun restoration can require editorial judgment.

How to use this Inverse Case Converter

Invert uppercase and lowercase letters while preserving non-letter characters. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.