Renaming a field from API JSON (camelCase) to a Python ORM column (snake_case). Generating CSS class names from design-system token names that arrive in PascalCase. Converting a list of headings into kebab-case slugs, or environment-variable names into CONSTANT_CASE. Quickly converting "The Quick Brown Fox" into Title Case, Sentence case, or Train-Case for a headline / button label.

Acronyms are tricky. Should "XMLHttpRequest" become "XML_Http_Request" or "Xml_Http_Request"? This tool treats consecutive capitals as one word boundary ( xml http request ), then re-cases — which matches Java/JS conventions but not all style guides. Numbers attach to the previous word. "Item2" becomes one word "item2", not two. Add a separator if you want them split. "camelCase first letter" is always lowercase even if the input started with a capital. PascalCase preserves the capital. Round-tripping isn't always lossless. Going camelCase → kebab-case → camelCase loses the original capitalisation hint at word boundaries; the case-detection heuristic does its best but can't recover what wasn't preserved.

Case Converter

Convert text between UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and dot.case.

Input

Output

What is this for?

Every language and platform has its own conventions for naming things — JavaScript wants camelCase, Python wants snake_case, CSS wants kebab-case, environment variables want CONSTANT_CASE. Translating between them by hand is fiddly, especially with edge cases (acronyms, numbers, existing separators). This tool splits any input into words by detecting case transitions, separators (_ - . /), and whitespace, then re-joins them in 14 different styles.

When to use it

Renaming a field from API JSON (camelCase) to a Python ORM column (snake_case).
Generating CSS class names from design-system token names that arrive in PascalCase.
Converting a list of headings into kebab-case slugs, or environment-variable names into CONSTANT_CASE.
Quickly converting "The Quick Brown Fox" into Title Case, Sentence case, or Train-Case for a headline / button label.

Common gotchas

Acronyms are tricky. Should "XMLHttpRequest" become "XML_Http_Request" or "Xml_Http_Request"? This tool treats consecutive capitals as one word boundary (xml http request), then re-cases — which matches Java/JS conventions but not all style guides.
Numbers attach to the previous word. "Item2" becomes one word "item2", not two. Add a separator if you want them split.
"camelCase first letter" is always lowercase even if the input started with a capital. PascalCase preserves the capital.
Round-tripping isn't always lossless. Going camelCase → kebab-case → camelCase loses the original capitalisation hint at word boundaries; the case-detection heuristic does its best but can't recover what wasn't preserved.