Text Case Converter

Convert text and identifiers

Paste text, choose a case style, and see the converted result instantly. The tool supports uppercase, lowercase, capitalized words, camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE.

Naming conversion

Naming styles detect words separated by spaces, punctuation, underscores, hyphens, or existing camelCase and PascalCase boundaries. For example, HTTPServer example_value becomes httpServerExample, http_server_example, or HTTP_SERVER_EXAMPLE depending on the selected style.

Capitalized mode preserves whitespace and punctuation while making the first letter of each word uppercase. Chinese text is retained, while letters that support casing are converted.

Sentence case lowercases the text and then capitalizes only the first letter of each sentence. Sentence starts are detected after ., !, ?, 。, ！, and ？, so hELLO WORLD. tHIS IS fine! becomes Hello world. This is fine!.

Privacy

All conversion happens locally in your browser. Your text is never uploaded or sent to a server.