Text Case Converter

It depends on the language and the kind of identifier. JavaScript, TypeScript, and Java use camelCase for variables, functions, and object properties, and PascalCase for classes, types, and React components. Python and Ruby favor snake_case for variables and functions, with PascalCase for classes. SQL columns are commonly snake_case. CSS classes, URL slugs, and file names lean on kebab-case. Environment variables and compile-time constants are CONSTANT_CASE. Matching the convention of the surrounding code is what keeps a codebase readable.

It tokenizes your text into words using three signals: runs of spaces or punctuation become separators, a lowercase-to-uppercase transition splits camelCase and PascalCase into separate words, and an acronym followed by a capitalized word — like HTMLParser — splits into HTML and Parser. Those words are then recombined into whichever target convention you copy. That means you can paste in any style and convert cleanly to any other, rather than only working from plain spaced text.

Title Case capitalizes the first letter of every word, which suits headings and button labels. Sentence case capitalizes only the first letter of each sentence and leaves the rest lowercase, which reads more naturally in body copy and is increasingly preferred in user interfaces. Note that strict editorial title case also lowercases short conjunctions and prepositions like 'and' or 'of'; this tool applies the simpler every-word rule, which is the right default for code-adjacent and UI text.

No. All transformations run in your browser with plain JavaScript string operations — nothing is uploaded, logged, or stored, and there are zero network requests, which you can verify in your browser's network tab. That makes it safe to convert internal field names, code snippets, or draft copy you would not want to paste into a remote service. A page refresh clears everything.

Numbers are preserved and treated as part of the adjacent word, so 'version2Beta' tokenizes sensibly. The word-splitting logic is tuned for ASCII letters and digits, which covers the overwhelming majority of identifiers and slugs. Accented or non-Latin characters are passed through by the upper and lower transforms but may not trigger a word boundary, so for heavily accented prose the spaced cases (UPPER, lower, Title, Sentence) are the most reliable.