PascalCase Converter

PascalCase capitalizes the first letter of every word and runs them together, like UserProfileImage. It is the convention for class names in C# and Java, React component names, and TypeScript interfaces and types. You will also see it called UpperCamelCase, particularly in older .NET style guides — the two names mean the same thing. This converter rewrites text from any common naming style into PascalCase, one line at a time, entirely in your browser.

Why does XMLHttpRequest become XmlHttpRequest?

Because every word is title-cased uniformly: the first letter is capitalized and the rest is lowercased, with no special case for acronyms. So XMLHttpRequest comes out as XmlHttpRequest and parseHTMLString as ParseHtmlString. This is the behaviour you should expect, not a bug — and it matches Microsoft's own .NET naming guidelines, which recommend title-casing acronyms of three letters or more (Xml, Http) and reserving all-caps for two-letter acronyms like ID and IO.

If you need an acronym preserved in full caps, fix it up after converting — the tool deliberately applies one consistent rule rather than guessing which uppercase runs are acronyms and which are shouted words.

PascalCase or camelCase — which do I want?

They are the same transformation apart from the very first character: PascalCase capitalizes the first word (UserProfile), camelCase leaves it lowercase (userProfile). The split is conventional rather than technical. Use PascalCase for things that name a type: classes, interfaces, enums, React components, TypeScript type aliases. Use camelCase for things that name a value: variables, function names, object properties, and method names in JavaScript and Java.

What can I paste in, and what happens to numbers?

Plain sentences, camelCase, snake_case, kebab-case, dot.case, SCREAMING_SNAKE_CASE, or a mix. Punctuation and spacing of any kind act as word separators and are dropped, so Hello, World! becomes HelloWorldFoo-style output with the punctuation removed.

Digits stay attached to the word before them: user2Name becomes User2Name and version2point0 becomes Version2Point0. This matches the camelCase Converter and is deliberately different from the dot.case and kebab-case converters, which isolate a digit as its own word because separators make that readable — something PascalCase, having no separators, cannot do.

Where is PascalCase used?

C# and .NET use it for classes, methods, properties, namespaces, and enum members — it is the dominant convention across the whole framework. Java uses it for class and interface names, alongside camelCase methods. React requires it for component names, because JSX treats a lowercase tag as an HTML element and an uppercase one as a component, so <MyButton /> works where <myButton /> silently does not. TypeScript uses it for interfaces, type aliases, and enums. It also turns up in Go for exported identifiers, where the initial capital is what makes a name public.

Last reviewed: August 2026