What Is This Tool?
PascalCase (also called UpperCamelCase) is a naming convention where every word begins with an uppercase letter and there are no spaces or punctuation between words. Unlike camelCase which starts lowercase, PascalCase starts uppercase — making it the standard for class names, type definitions, interfaces, and component names in modern programming.
Our converter instantly transforms any text — whether it has spaces, hyphens, underscores, or mixed formatting — into clean, properly formatted PascalCase. It strips special characters, handles multiple word separators, and produces output ready for your classes, types, and components.
This tool is essential for:
- C# and .NET developers naming classes, methods, properties, and namespaces
- React developers creating component files and type definitions
- TypeScript developers defining interfaces, types, enums, and class names
- Java and Kotlin developers following language class naming conventions
- Students learning OOP and needing correct class naming
Related tools: CamelCase Converter and Snake Case Converter.
Why You Need It in 2026
1. C# and .NET Enforce PascalCase
C# requires PascalCase for class names, method names, properties, namespaces, events, and public members. This is a .NET naming convention enforced by the default .editorconfig and Roslyn analyzers. Using incorrect casing generates hundreds of warnings in your build output and signals unfamiliarity with the ecosystem.
2. React Components Must Be PascalCase
React requires component names to start with an uppercase letter. JSX treats lowercase tags as HTML elements (<div>) and uppercase tags as components (<UserProfile>). If you name a component with lowercase, React silently treats it as an HTML element and your component won't render.
3. TypeScript Types and Interfaces Require It
TypeScript uses PascalCase for type aliases, interfaces, enums, and class names (interface UserProfile, type ApiResponse, enum Status). This convention distinguishes types from values at a glance, making code easier to read and preventing naming collisions.
4. Java and Kotlin Class Names
Java classes use PascalCase (StringBuilder, ArrayList, FileInputStream). It distinguishes classes from variables and methods, which use camelCase. Kotlin follows the same convention. Breaking this pattern confuses other developers and violates language style guides.
5. File Naming Consistency
Many frameworks expect component files to match their PascalCase export name (UserProfile.tsx exports UserProfile). Converting your component name to PascalCase ensures your file naming, import paths, and component names are all consistent.
✨ Try Our Free Tool
How to Use: Step-by-Step
Step 1: Enter Your Text
Type or paste text with spaces, hyphens, underscores, or mixed case into the input area. The converter handles all common input formats — feature names, entity descriptions, type definitions — and normalizes them to PascalCase.
Step 2: Get Instant PascalCase
The result updates in real-time as you type. No button click needed. The converter capitalizes the first letter of every word, strips special characters, and collapses multiple separators into clean PascalCase output.
Step 3: Use in Your Code
Click the Copy button and paste the result into your class definitions, type declarations, React component files, or C# namespaces. The output is ready for production code in any language that uses PascalCase.
Real-World Examples
Scenario: You're building a React application and need to create a new component that displays a user's order history.
Challenge: Your component needs a PascalCase name that matches the file name (OrderHistory.tsx) and passes ESLint rules for React component naming.
Solution: Paste "order history" into the converter. Output: OrderHistory. Your file is OrderHistory.tsx, your export is export default function OrderHistory(), and your JSX usage is <OrderHistory />. Everything is consistent.
Scenario: You're defining TypeScript interfaces for an API response that contains user data, order items, and shipping addresses.
Challenge: You need 8 interface names in PascalCase. Writing them manually risks inconsistent casing (UserProfile vs user_profile vs userProfile).
Solution: Paste each name into the converter: "user profile" → UserProfile, "order item" → OrderItem, "shipping address" → ShippingAddress. All 8 interfaces are consistently PascalCase, matching TypeScript conventions exactly.
Scenario: You're creating a C# class for a payment processing service in a .NET application.
Challenge: Your .editorconfig enforces PascalCase for class names. The class needs to be descriptive but follow .NET naming conventions.
Solution: Paste "payment processing service" into the converter. Output: PaymentProcessingService. Your class name is compliant, your namespace hierarchy is clear, and your build produces zero naming warnings.
Best Practices
1. Always Start Every Word with Uppercase
Every word in PascalCase starts with uppercase, including the first word. This distinguishes it from camelCase (lowercase first). Mixing them causes bugs in React (lowercase components treated as HTML) and linter violations in C# and TypeScript.
2. Use PascalCase Only for Types, Classes, and Components
PascalCase is reserved for types, classes, interfaces, enums, and React components. Variables and functions should use camelCase. Using PascalCase for a variable (let UserProfile = ...) is a code smell that confuses other developers.
3. Match File Names to Component Names
React component files should have the same PascalCase name as the component they export. UserProfile.tsx should export UserProfile. Mismatched names cause import confusion and make your codebase harder to navigate.
4. Follow Language-Specific Conventions
C# and .NET use PascalCase more broadly (methods, properties, events, namespaces). TypeScript restricts it to types, interfaces, and classes. Java uses it only for class names. Know your language's conventions and follow them precisely.
5. Don't Abbreviate in PascalCase
Avoid abbreviations like "Svc" instead of "Service" or "Mgr" instead of "Manager" in PascalCase names. PascalCase names are typically for types and classes where readability matters most. Write PaymentProcessingService, not PaymentProcSvc.
Frequently Asked Questions
Q: What is PascalCase used for?
A: PascalCase is the standard for class names in C#, TypeScript, Java, and .NET. It's also used for React component names, TypeScript interfaces and types, and enum definitions.
Q: What's the difference from camelCase?
A: PascalCase capitalizes every word including the first (UserProfile). camelCase starts with a lowercase letter (userProfile). Use PascalCase for types and classes; use camelCase for variables and functions.
Q: Is PascalCase the same as UpperCamelCase?
A: Yes! PascalCase and UpperCamelCase are different names for the exact same convention. The terms are used interchangeably in documentation and style guides.
Q: Can I use PascalCase for React components?
A: Yes! React requires component names to start with an uppercase letter (PascalCase) to distinguish them from HTML elements. JSX treats <myComponent> as HTML but <MyComponent> as a React component.
Q: Can I convert multiple lines at once?
A: Yes. Paste multiple lines and each line will be converted to PascalCase independently. This is useful for batch-converting class names or type definitions.
Q: Can I convert existing code identifiers?
A: Yes. Paste any text with spaces, underscores, or hyphens and convert to proper PascalCase. This works for converting snake_case database names to C# class names.
Q: Is this tool secure?
A: Yes. All conversion happens in your browser locally. Nothing is sent to any server.
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