Text Case Converter

Case Formats Reference

Examples

Each row is the tool’s output for the same input. The input getHTTPResponseCode v2 mixes an acronym, camel humps and a version number:

The digit splits from the letter, so v2 becomes v-2 in kebab-case. In camelCase and PascalCase the two parts are joined again, which is why V2 looks unchanged there. If you need v2 as one word, rename it in the result.

A second input, OAuth2 token expires_in, shows how a mixed-case brand name is split: camelCase gives oAuth2TokenExpiresIn, snake_case gives o_auth_2_token_expires_in. The split happens at the lowercase-to-uppercase change in “OAuth”. Write oauth2 in lower case first if you want oauth_2_token_expires_in.

A list of SQL columns such as user_id, created_at becomes userIdCreatedAt in camelCase: the comma and space are separators like any other punctuation, so all words end up in one identifier.

How Words Are Split

camelCase, PascalCase, kebab-case, snake_case and CONSTANT_CASE first split the input into words, with the same rules as the change-case library’s split with separateNumbers:

• At a lowercase letter or digit followed by an uppercase letter: userLoginCount → user, Login, Count.
• Before the last capital of an acronym that starts a new word: XMLHttpRequest → XML, Http, Request.
• Between letters and digits: base64Encode → base, 64, Encode.
• At any run of spaces, punctuation or symbols: user-login_count → user, login, count.

Apostrophes are removed before splitting (as lodash does), so don’t stop → dontStop. Letters from any script and their accents are kept: café au lait → caféAuLait, Привет мир → приветМир.

Limitations

• Title Case and Sentence case keep your spacing and punctuation and do not split identifiers: userLoginCount → Userlogincount. Title Case capitalizes every word, including short words such as “of” and “the”.
• Sentence case capitalizes only the first character of the whole input and lowercases the rest: first. second sentence! THIRD → First. second sentence! third. Proper nouns and later sentences need manual fixes.
• The identifier formats treat line breaks as separators too, so a multi-line list becomes one long identifier. Convert one name at a time, or use Line Tools to clean up a list first. For URL slugs with transliteration of accented letters, use Slugify.
• Acronyms are not kept in capitals in camelCase or PascalCase: parseHTML → parseHtml.
• Case changes use the browser’s default Unicode rules, not a language-specific locale: ß becomes SS in CONSTANT_CASE, and Turkish dotted/dotless i is not handled.
• Scripts without letter case (Chinese, Japanese, Korean) pass through unchanged; only spaces and punctuation between them become separators.