Case converter

Case conventions are not cosmetic — in code they carry meaning, and in prose they follow style guides that genuinely disagree with each other.

Programming cases

camelCase

JavaScript and Java variables and functions.

PascalCase

Class and type names in most languages; components in React and Svelte.

snake_case

Python and Ruby variables, and SQL columns.

kebab-case

URLs, CSS classes and custom HTML elements — which require a hyphen.

CONSTANT_CASE

Environment variables and compile-time constants.

Title case is not one rule

“Smart Title Case” above keeps short prepositions, articles and conjunctions lowercase unless they are the first or last word — the common denominator of the AP, Chicago and MLA styles. They differ in the details: Chicago lowercases all prepositions regardless of length, AP capitalises those of four letters or more. When it matters, check the specific guide.

Acronym handling

The tokeniser splits HTTPServerError into HTTP, Server and Error rather than mangling it into h-t-t-p-server-error, which is the case most naive converters get wrong.