Case Converter

What does a case converter do?

A case converter rewrites the same words in a different capitalisation style without you retyping them. Programmers move constantly between cases: a database column might be user_id, the matching JavaScript variable userId, the React component UserId, the CSS class user-id, and an environment variable USER_ID. This tool takes whatever you paste — even text that is already in one of these styles — splits it back into individual words, and instantly renders every common case side by side so you can copy the exact form you need.

Programming cases explained

camelCase and PascalCase remove spaces and use capitalisation to mark word starts; camelCase is for variables and functions, PascalCase for classes and types. snake_case joins lowercase words with underscores and dominates Python and SQL. kebab-case uses hyphens and is the standard for URLs, CSS, and file names. CONSTANT_CASE shouts fixed values in all caps. Picking the convention your language or framework expects keeps code consistent and avoids subtle bugs from mismatched identifiers.

Writing cases for content

Beyond code, the tool covers writing styles. Title Case capitalises every word for headlines, Sentence case matches normal prose, and plain lowercase or UPPERCASE handle bulk transforms — useful for normalising data, fixing an accidental caps-lock paragraph, or preparing slugs. The playful aLtErNaTiNg case flips letter casing for emphasis in memes and social posts. Everything updates live as you type, so you can experiment freely and copy any result with a single click.