How does the tool split words for camelCase, snake_case, and similar styles?

Word-based styles split your input on sequences of characters that are not Unicode letters or numbers, then join with underscores, hyphens, dots, or slashes—or change capitalization for camel and Pascal case. Extra spaces and punctuation become separators. Pure upper/lower/sentence case apply to the entire string, including newlines.

What is the difference between camelCase and PascalCase?

camelCase starts with a lowercase letter on the first segment (fooBar). PascalCase capitalizes the first letter of every segment (FooBar). Both are common in programming: camelCase for JavaScript variables, PascalCase for React components and many class names.

Will sentence case fix abbreviations like “U.S.A.”?

Not perfectly. Sentence case lowercases the whole string, then capitalizes the first letter and letters after . ! ? …. That can lowercase intentional acronyms. For legal or technical text, proofread the output or use title case only where appropriate.

Does this send my text to a server?

No. Every conversion runs in your browser. Your input may be saved in local storage on your device for convenience until you clear it or click Clear.

Why is kebab-case popular in URLs and CSS?

Hyphens are unescaped in URLs and readable in HTML attributes and CSS custom properties. snake_case is more common in Python and Ruby; SCREAMING_SNAKE is often used for constants. Pick the style your stack and style guide expect.

Free Case Converter Online — camelCase, snake_case, kebab-case

Case converter

Input

Input is capped at 500,000 characters. Conversions run locally in your browser.

Quick copy

All conversions

camelCase

lowerCamel — first segment lowercase

PascalCase

UpperCamel — each word capitalized

snake_case

lowercase with underscores

SCREAMING_SNAKE_CASE

UPPERCASE with underscores

kebab-case

lowercase with hyphens

Title Case

Capitalize Each Word

UPPER CASE

Entire string uppercased

lower case

Entire string lowercased

Sentence case

Capitalize after sentence endings

dot.case

lowercase with dots

path/case

lowercase with slashes

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What is a case converter?

A case converter rewrites the same words into naming conventions used in code, URLs, configuration, and editorial style: camelCase for JavaScript variables, PascalCase for components, snake_case in Python, kebab-case in URLs, and constant-style SCREAMING_SNAKE for enums and environment keys.

This tool shows every variant at once so you can copy the one your linter, API, or design system expects without retyping.

How to use this tool

Paste or type your source text—identifiers, headings, CSV headers, or prose.
Review all conversions below; each box updates live as you type.
Use Quick copy buttons for a one-click copy of a specific style, or the Copy button beside each output.
Click Clear when you are done with sensitive strings.

When to use each style

camelCase / PascalCase: JavaScript, TypeScript, C#, and Java naming for variables, types, and classes.
snake_case / SCREAMING_SNAKE: Python, Ruby, and database columns; constants and env vars often use uppercase snake.
kebab-case / path/case: URL slugs, HTML data attributes, and folder-like namespaces.
Title Case / Sentence case: Headlines, UI labels, and narrative copy.

Limits and edge cases

Very long inputs are capped to keep the page responsive. Word splitting is not aware of camelCase boundaries inside a single token: fooBar is treated as one word unless you add a separator. For counting and diffing after conversion, use the word counter and text diff tools together.

Unicode letters and numbers are supported in tokens; emoji and symbols usually act as separators.

Frequently asked questions about the case converter

What is a case converter?

This tool shows every variant at once so you can copy the one your linter, API, or design system expects without retyping.

When to use each style

camelCase / PascalCase: JavaScript, TypeScript, C#, and Java naming for variables, types, and classes.

snake_case / SCREAMING_SNAKE: Python, Ruby, and database columns; constants and env vars often use uppercase snake.

kebab-case / path/case: URL slugs, HTML data attributes, and folder-like namespaces.

Title Case / Sentence case: Headlines, UI labels, and narrative copy.

Limits and edge cases

Unicode letters and numbers are supported in tokens; emoji and symbols usually act as separators.