Case Converter

camelCase joins words without spaces, lowercasing the first word and capitalising the start of each subsequent word (e.g. "hello world" → "helloWorld"). It's commonly used for variable and function names in JavaScript, Java, and many other languages.

PascalCase (also called UpperCamelCase) is like camelCase but capitalises the first word too (e.g. "hello world" → "HelloWorld"). It's the standard for class names in most object-oriented languages and for React component names.

Both formats use all-lowercase words, but snake_case joins them with underscores ("hello_world") while kebab-case uses hyphens ("hello-world"). snake_case is common in Python and database column names; kebab-case is common in CSS class names and URL slugs.

Title Case capitalises the first letter of every word (e.g. "the quick brown fox" → "The Quick Brown Fox"). This tool applies simple title case — every word is capitalised — rather than editorial title case, which leaves short prepositions and articles lowercase.

Sentence case capitalises only the first letter of each sentence and each new paragraph, leaving everything else lowercase. It's the standard capitalisation style for body text in most writing.

When converting structured identifiers like "helloWorld" or "HTMLParser", the tool first splits on the camelCase/PascalCase word boundaries before applying the target format. So "helloWorld" becomes "hello_world" in snake_case, "HELLO WORLD" in uppercase, and so on.