Naming Convention Converter (camelCase, snake_case, kebab-case…)

Different languages and tools expect different naming conventions: camelCase in JavaScript and Java, PascalCase for classes, snake_case in Python and SQL, SCREAMING_SNAKE_CASE for constants, kebab-case in URLs and CSS, Train-Case in HTTP headers. Paste identifiers or plain phrases — one per line — and see every convention at once. Word boundaries are found the way developers write them: spaces, underscores, hyphens, dots and slashes, lower-to-upper changes and acronym runs, so XMLHttpRequest becomes xml_http_request rather than x_m_l_http_request.

How to use this tool

1. Type or paste identifiers, one per line — any convention or ordinary words.
2. Choose whether acronyms stay capitalized in camelCase and PascalCase.
3. Choose whether numbers belong to the word before them.
4. Copy a whole column from the results, or use the table to compare conventions per line.

Formula

split into words → camelCase: first word lower, others Capitalized · snake_case: lower joined by _ · kebab-case: lower joined by -

Words are split on any character that is not a letter or digit, before an upper-case letter that follows a lower-case one (userName → user, Name), and before the last capital of an upper-case run that is followed by lower-case letters (HTTPServer → HTTP, Server). By default digits stay with the preceding word (html5, v2). Upper- and lower-casing follow Unicode, so straße becomes STRASSE.

Example

XMLHttpRequest becomes xmlHttpRequest (camelCase), XmlHttpRequest (PascalCase), xml_http_request (snake_case), XML_HTTP_REQUEST, xml-http-request, XML-HTTP-REQUEST, Xml-Http-Request, xml.http.request, xml/http/request and xmlhttprequest. With "keep acronyms" ticked, PascalCase stays XMLHttpRequest and userID stays userID.