Case Converter

To convert text to uppercase, paste your text into a case converter and select the UPPERCASE option. This transforms every letter to its capital form (e.g., "hello world" becomes "HELLO WORLD"). In programming, you can use JavaScript toUpperCase(), Python upper(), PHP strtoupper(), or CSS text-transform: uppercase.

Title Case capitalizes the first letter of every word (e.g., "The Quick Brown Fox Jumps"). Sentence case capitalizes only the first letter of each sentence (e.g., "The quick brown fox jumps. The lazy dog sleeps."). Title Case is standard for headlines, book titles, and article headings. Sentence case is used for body text, blog post titles, and formal documents. Note that some style guides treat minor words (a, an, the, of, in) differently in Title Case.

camelCase starts with a lowercase first letter and capitalizes subsequent words (e.g., "firstName", "getUserData"). PascalCase (also called UpperCamelCase) capitalizes every word including the first (e.g., "FirstName", "UserData"). camelCase is the standard naming convention for variables and functions in JavaScript, Java, Swift, and C#. PascalCase is used for classes, interfaces, components, and type names.

snake_case uses all lowercase letters with underscores separating words (e.g., "first_name", "get_user_data"). It is the standard naming convention for variables and functions in Python, Ruby, Rust, and PHP. It is also commonly used for database column names and configuration keys. A variation called CONSTANT_CASE uses all uppercase letters with underscores and is used for constants (e.g., "MAX_RETRY_COUNT").

kebab-case uses all lowercase letters with hyphens (dashes) separating words (e.g., "first-name", "user-profile-page"). It is widely used in CSS class names (e.g., "btn-primary"), HTML IDs, URL slugs, file names for web content, and configuration files like package.json. It cannot be used as variable names in most programming languages because the hyphen is interpreted as a subtraction operator.

CONSTANT_CASE uses all uppercase letters with underscores separating words (e.g., "MAX_CONNECTIONS", "DEFAULT_TIMEOUT"). It is a naming convention used across many programming languages to denote constants, configuration values, environment variables, and enum values. It is essentially the uppercase version of snake_case.

Converting between naming conventions (camelCase, PascalCase, snake_case, kebab_case, CONSTANT_CASE) requires splitting text into individual words first. The tool identifies word boundaries by detecting uppercase letters, underscores, hyphens, or spaces, then reassembles the words in the target format. This case converter handles all common programming naming conventions automatically.

Yes, this case converter is completely free and processes all text entirely in your browser. Your text is never sent to any server, stored, or logged. Everything happens client-side using JavaScript, making it fast, private, and secure — even for sensitive text.