Case Converter

Programming languages and file formats each have their own naming conventions, and this tool switches text between the eight most common ones. Word boundaries are detected from spaces, hyphens, underscores, and the lowercase-to-uppercase transitions inside camelCase or PascalCase words, so "user profile settings", "user-profile-settings", and "userProfileSettings" all convert cleanly into any other style.

camelCase (userProfile) is the default for variables and function names in JavaScript, Java, and Swift. PascalCase (UserProfile) marks class and component names in the same languages, plus C#. snake_case (user_profile) is idiomatic in Python and Ruby, and is also the standard for database column and file names on Unix systems. kebab-case (user-profile) shows up in URLs, CSS class names, and HTML attributes, where underscores and capital letters aren't conventional. Title Case and Sentence case matter for headings and prose rather than code — Title Case capitalizes each significant word for headlines, while Sentence case capitalizes only the first letter, matching normal written English.

Switching a batch of strings between these styles by hand is tedious and error-prone, especially when renaming variables across a codebase or reformatting a CSV header row to match a different system's naming rules.

Languages and tools have naming conventions. JavaScript variables use camelCase, classes use PascalCase, Python uses snake_case, CSS and URLs use kebab-case and environment variables use CONSTANT_CASE.

Word boundaries are detected from spaces, hyphens, underscores and lower-to-upper transitions. Acronyms such as HTTPServer can be split in unexpected places, so review the output for names containing them.