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Case Converter

Name: Case Converter - WebUtil
Author: WebUtil

Convert text between camelCase, snake_case, kebab-case, and more.

Input

Output

What Is a Case Converter?

A case converter is a tool that transforms text between different naming conventions and letter casings. Developers, writers, and data professionals use a text case converter to switch between formats like camelCase, snake_case, kebab-case, and others. Our free online case converter runs entirely in your browser, ensuring your text never leaves your device.

Common Naming Conventions

camelCase

First word lowercase, subsequent words capitalized, no separators. Example: myVariableName. Used in JavaScript, Java, and C#.

PascalCase

Every word starts with an uppercase letter, no separators. Example: MyClassName. Used for classes, constructors, and types.

snake_case

Words separated by underscores, all lowercase. Example: user_first_name. Standard in Python and Ruby.

kebab-case

Words separated by hyphens, all lowercase. Example: css-class-name. Common in URLs, HTML attributes, and CSS.

When to Use Each Case Type

camelCase — JavaScript, TypeScript, Java, C# for variables and function names.
PascalCase — Class names, constructors, type definitions, and React component names.
snake_case — Python variables, database column names, configuration keys, and environment variables.
kebab-case — URL slugs, CSS class names, HTML data attributes, and file names.
UPPER CASE — Constants, environment variables, and preprocessor macros.
lower case — General text normalization, slugs, and domain names.
Title Case — Headings, titles, labels, and display names in user interfaces.

How to Use This Case Converter

To convert text case, type or paste your text into the input field and click any case button — camelCase, PascalCase, snake_case, kebab-case, UPPER CASE, lower case, or Title Case. The converted result appears instantly in the output area. Use the Copy button to copy the result to your clipboard. All conversion happens on your device — nothing is sent to a server.

Consistent naming conventions and text casing are critical in modern software engineering, database design, API development, and technical writing. Different programming languages and frameworks enforce distinct casing standards: JavaScript and Java utilize camelCase for variables and methods (`userProfile`), TypeScript and C# utilize PascalCase for classes and interfaces (`UserProfile`), Python and Rust mandate snake_case for functions and variables (`user_profile`), and environment variables demand CONSTANT_CASE (`USER_PROFILE`). In web development and SEO, kebab-case (`user-profile`) is the universal standard for URL slugs and CSS classes because search engine crawlers treat hyphens as natural word separators. Converting variable names across language boundaries, transforming database columns into API JSON models, or formatting article titles into Title Case or sentence case can be tedious and prone to typos. WebUtil's Case Converter parses text across spaces, underscores, and hyphens to convert strings into camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE, Title Case, UPPERCASE, and lowercase in real time.

How to Do This in Code

function toCamelCase(str) {
  return str.replace(/[-_\s]+(.)/g, (_, c) => c.toUpperCase());
}
function toSnakeCase(str) {
  return str.replace(/[A-Z]/g, l => '_' + l.toLowerCase()).replace(/^_/, '');
}

import re
def to_snake(s):
  return re.sub(r'([A-Z])', r'_\1', s).lower().lstrip('_')

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Case Converter Guide: camelCase, snake_case, kebab-case and More

Master text case conversion between camelCase, PascalCase, snake_case, kebab-case, and other naming conventions.

Case Converter FAQ

What is the difference between camelCase, PascalCase, snake_case, and kebab-case?

camelCase capitalizes every word except the first without spaces (myVariable). PascalCase capitalizes all words (MyClass). snake_case separates words with underscores (my_variable). kebab-case separates words with hyphens (my-variable).

Which casing convention is best for SEO-friendly URLs?

kebab-case (hyphen-separated words) is the official Google-recommended convention for URL slugs. Googlebot interprets hyphens as word delimiters, whereas underscores can concatenate terms.

Which naming conventions are standard in Python, JavaScript, and C#?

Python uses snake_case for functions and variables. JavaScript uses camelCase for functions and PascalCase for classes. C# uses PascalCase for methods and public properties.

How does this tool handle numbers, acronyms, and special characters?

WebUtil identifies word boundaries using whitespace, casing transitions, and punctuation, preserving numbers and converting acronyms cleanly into your desired case format.

Can I convert large blocks of text or code at once?

Yes. You can paste paragraphs of text or multi-line lists of variables to convert them all simultaneously with zero latency.