Free Case Converter
Convert text between uppercase, lowercase, title case, camelCase, snake_case, and more. Instant results. No signup required.
Select Format
What Is a Case Converter?
A case converter is a text transformation tool that instantly changes the capitalization pattern of your text. Different contexts require different capitalization conventions: programming languages use camelCase or snake_case for variable names, headlines use Title Case, database columns use CONSTANT_CASE, and URLs use kebab-case. Manually converting between these formats is tedious and error-prone, especially for long strings or multiple variables. Our free case converter handles all common formats in one place — paste your text, click a format, and copy the result. It's a daily utility for developers naming variables, designers formatting headings, writers adjusting tone, and content creators standardizing terminology.
How Does the Case Converter Work?
The converter processes your input text using JavaScript string methods, with different logic per format. UPPERCASE and lowercase use toUpperCase() and toLowerCase() on the entire string. Title Case capitalizes the first letter of each word. Sentence case capitalizes only the first letter of the entire string. camelCase splits words on spaces, hyphens, and underscores, lowercases all, then capitalizes the first letter of each word except the first. PascalCase does the same but capitalizes all words including the first. snake_case replaces spaces with underscores and lowercases all. kebab-case replaces spaces with hyphens and lowercases all. CONSTANT_CASE converts to snake_case then uppercases. aLtErNaTiNg case toggles capitalization character by character. All conversions happen instantly in your browser with no server calls.
Features
- ✓10 case formats: UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, aLtErNaTiNg
- ✓One-click copy for any converted result
- ✓Live character and word count badge
- ✓Works with any language text
- ✓Fully client-side — no text is sent to any server
Benefits
Speed Up Development Workflows
Developers constantly switch between naming conventions — camelCase in JavaScript, snake_case in Python and databases, CONSTANT_CASE for environment variables, PascalCase for classes and components. This tool converts entire variable names or lists of names instantly.
Consistent Content Formatting
Writers and content creators can paste headings, titles, or slugs and instantly standardize capitalization. Title Case for headlines, lowercase for URL slugs, Sentence case for meta descriptions — consistency in a few clicks.
No Typing Errors
Manually typing camelCase or snake_case for long variable names invites typos. Paste the plain text name and convert to the exact format needed — the tool handles every character correctly.
Privacy First
The conversion runs entirely in your browser. Your text is never uploaded to a server, stored, or logged. Paste sensitive variable names, API keys, or internal terminology with confidence.
Frequently Asked Questions
What is camelCase?
camelCase formats text by removing spaces and capitalizing the first letter of each word except the first. Example: 'my variable name' becomes 'myVariableName'. It's the standard naming convention in JavaScript, Java, and many other programming languages for variables and function names.
What is snake_case?
snake_case replaces spaces with underscores and lowercases all characters. Example: 'my variable name' becomes 'my_variable_name'. It's commonly used in Python, Ruby, PHP for variable and function names, and in SQL for column names and table names.
What is kebab-case?
kebab-case replaces spaces with hyphens and lowercases all characters. Example: 'my variable name' becomes 'my-variable-name'. It's the standard format for CSS class names, HTML attributes, URL slugs, and file names in most web projects.
What is PascalCase?
PascalCase (also called UpperCamelCase) capitalizes the first letter of every word including the first. Example: 'my variable name' becomes 'MyVariableName'. It's the standard naming convention for class names in JavaScript, TypeScript, Java, C#, and most object-oriented languages.
Is the case converter free?
Yes, completely free with no signup, no character limits, and no premium tier. Your text never leaves your browser — all conversions happen locally.
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