Text Case Converter — camelCase, snake_case, PascalCase, kebab-case & 14 Formats

Paste your text into the input field at the top of this converter. All 14 case formats are shown simultaneously in the grid below — find the camelCase card and click "Copy" to copy the converted text to your clipboard. camelCase joins words together with no separator and capitalizes every word except the first: "hello world" becomes "helloWorld". The converter automatically handles text from any source — it splits on spaces, hyphens, underscores, dots, and even detects existing camelCase or PascalCase boundaries.

camelCase starts with a lowercase letter and capitalizes each subsequent word: helloWorld. It is the default naming convention for variables and functions in JavaScript, Java, Swift, Kotlin, and Dart. PascalCase (also called UpperCamelCase) capitalizes every word including the first: HelloWorld. It is used for class names, component names in React, and type names in TypeScript and C#. snake_case separates words with underscores and uses all lowercase: hello_world. It is the standard for variables and functions in Python, Ruby, and Rust, and for database column names in SQL.

kebab-case (also written as "kebab case" or "spinal case") separates words with hyphens and uses all lowercase: hello-world. It is the standard for CSS class names, HTML attributes, URL slugs, and file names in web projects. For example: a CSS utility class might be .flex-center, a URL might be /blog/getting-started-with-react, and a package name in npm uses kebab-case. Kebab-case is invalid in most programming languages as a variable or function name because the hyphen is interpreted as a minus operator — it is primarily a web and filesystem convention.

SCREAMING_SNAKE_CASE (also called CONSTANT_CASE or UPPER_SNAKE_CASE) uses all uppercase letters with underscores between words: HELLO_WORLD. It is the universal convention for constants, environment variables, and compile-time configuration values across almost every programming language. Examples: MAX_RETRIES = 3, API_BASE_URL, NODE_ENV = "production", HTTP_PORT = 8080. In Python, Java, JavaScript, C, C++, Go, and Rust, constants defined at the module or global scope use SCREAMING_SNAKE_CASE. Environment variables in .env files and shell scripts also follow this convention.

Paste your camelCase text (e.g., "getUserProfile") into the input field. The converter automatically detects camelCase word boundaries by splitting on transitions between lowercase and uppercase letters. The snake_case card in the grid shows the converted result: "get_user_profile". Click "Copy" to copy it. The same input simultaneously produces all other formats — PascalCase, kebab-case, SCREAMING_SNAKE_CASE, and more — so you can switch between naming conventions for the same identifier without re-typing.

Title Case capitalizes the first letter of every word: "Hello World". It is used for article headings, page titles, button labels, navigation items, and book titles. This converter capitalizes every word including short conjunctions and prepositions, which is appropriate for UI labels and headings. Academic and journalistic style guides (APA, Chicago, AP) define slightly different rules — for example, short prepositions like "in", "on", and "at" are typically not capitalized in headlines — but for most web and UI purposes, capitalizing every word produces consistent, readable results.

COBOL-CASE (also called screaming kebab case or UPPER-KEBAB-CASE) uses all uppercase letters separated by hyphens: HELLO-WORLD. It gets its name from the COBOL programming language, where identifiers historically used this format. Today it appears as HTTP header names (Content-Type, X-Request-ID, Accept-Language), in some legacy enterprise systems, and occasionally in configuration file keys. The Train-Case variant (Hello-World) is used specifically for HTTP headers in Go's http package, where it distinguishes canonically formatted header keys.

Yes — the converter handles multi-line input. Each line is converted independently so line breaks are preserved in the output. For example, if you paste a list of database column names like "user_first_name", "email_address", "created_at" with each on its own line, the camelCase output will show "userFirstName", "emailAddress", "createdAt" — one per line. This is useful when renaming a batch of variables, converting a list of API field names between conventions, or reformatting a set of CSS class names. Pin your most-used case formats to the top of the grid using the ⊹ button for faster access.