Case Converter– Change Text Case Online

Convert text between uppercase, lowercase, Title Case, camelCase, snake_case, kebab-case, and PascalCase.

Input Text

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Converted Text

Why Use Our Case Converter?

7 Formats

Upper, Lower, Title, camelCase, snake_case, kebab-case, and PascalCase in one tool.

Instant Convert

Click a button and see the result immediately. No processing delay.

Dev Formats

Convert between programming naming conventions used across all languages.

100% Secure

All processing in your browser. Your text never leaves your device.

One-Click Copy

Copy converted text to clipboard instantly for use in your code or documents.

Free Forever

No signup, no limits. Convert unlimited text completely free.

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Complete Case Conversion Guide

Text case conversion transforms text between different capitalization formats. Beyond simple uppercase and lowercase, modern development requires converting between programming naming conventions like camelCase, snake_case, kebab-case, and PascalCase. Each format has specific use cases across different programming languages, frameworks, and contexts.

Our free online case converter supports seven different formats in one tool. Simply paste your text and click the desired format button. The conversion handles word boundary detection intelligently, recognizing spaces, hyphens, underscores, and camelCase boundaries to split text into words before reassembling in the target format.

Case conversion is essential for developers who work across multiple languages and frameworks. JavaScript uses camelCase for variables, Python uses snake_case, CSS uses kebab-case, and class names use PascalCase. When converting between these ecosystems, a case converter eliminates tedious manual reformatting and reduces errors.

All conversion happens locally in your browser. Your text never leaves your device, making this tool safe for converting proprietary code, variable names, or any sensitive content.

Format	Example	Common Usage
UPPER CASE	HELLO WORLD	Constants, environment variables, SQL keywords
lower case	hello world	General text, email addresses, URLs
Title Case	Hello World	Headings, titles, proper nouns
camelCase	helloWorld	JavaScript/Java/C# variables and functions
snake_case	hello_world	Python, Ruby, database columns, file names
kebab-case	hello-world	CSS classes, URL slugs, HTML attributes, CLI flags
PascalCase	HelloWorld	Class names, React components, TypeScript types

Understanding these conventions is essential for writing idiomatic code across different languages and following team style guides. Consistent naming improves readability and reduces cognitive load for developers reading unfamiliar code.

Cross-Language Development

Convert variable names when porting code between languages. Python's snake_case variables become camelCase in JavaScript, PascalCase for C# classes, etc.

API Integration

APIs often use snake_case in JSON responses, but JavaScript frontends use camelCase. Convert field names when mapping between API responses and frontend code.

CSS Class Generation

Generate kebab-case CSS class names from descriptive text. Convert component names to CSS-friendly formats for styling frameworks like BEM or Tailwind.

URL Slug Creation

Convert article titles and headings to kebab-case URL slugs. Clean, lowercase, hyphenated URLs are SEO-friendly and human-readable.

Database Schema Design

Convert descriptive names to snake_case for database column names and table names. Consistent naming in databases prevents SQL errors and improves query readability.

Content Formatting

Convert text to Title Case for headings, UPPER CASE for emphasis or constants, or lowercase for normalization and comparison purposes.

Follow language conventions: Use the naming convention standard for each programming language. camelCase for JavaScript, snake_case for Python, PascalCase for C# classes. Consistency within a codebase is more important than personal preference.
Use constants in UPPER_SNAKE_CASE: Environment variables, configuration constants, and enum values are typically written in SCREAMING_SNAKE_CASE (all uppercase with underscores) across most languages.
Automate with linters: Configure ESLint, Pylint, or other linters to enforce naming conventions automatically. This catches inconsistencies during development rather than in code reviews.
Be consistent with acronyms: Decide whether acronyms stay uppercase (getHTTPResponse) or follow standard casing (getHttpResponse). Most modern style guides recommend the latter for readability.
Document your team's standards: Add naming convention rules to your team's style guide. Include examples for each type: variables, functions, classes, constants, file names, and database columns.

How do I convert text case online?

Paste your text in the input area, then click the desired case button (Upper, Lower, Title, camelCase, snake_case, kebab-case, or PascalCase). The converted text appears instantly in the output area.

What is Title Case?

Title Case capitalizes the first letter of each word while making the rest lowercase. 'hello world' becomes 'Hello World'. It's commonly used for headings, titles, and proper nouns.

What is camelCase?

camelCase joins words together with the first word lowercase and subsequent words capitalized: 'hello world' becomes 'helloWorld'. It's the standard naming convention for variables and functions in JavaScript, Java, and many other languages.

What is snake_case?

snake_case joins words with underscores and uses all lowercase: 'hello world' becomes 'hello_world'. It's the standard naming convention in Python, Ruby, and database column names.

What is kebab-case?

kebab-case joins words with hyphens and uses all lowercase: 'hello world' becomes 'hello-world'. It's commonly used in CSS class names, URL slugs, and HTML attributes.

What is PascalCase?

PascalCase is like camelCase but with the first letter also capitalized: 'hello world' becomes 'HelloWorld'. It's used for class names in most programming languages and component names in React.

Is this case converter free?

Yes, completely free with no signup required. Convert unlimited text between any case format. All processing happens in your browser.

Is my text data secure?

Yes, all processing happens locally in your browser. Your text never leaves your device, is never sent to servers, and is never stored anywhere.

Can I convert multiline text?

Yes, the tool handles multiline text. Each line is converted independently, preserving the line structure of your original text.

How do I convert from camelCase to snake_case?

Paste your camelCase text and click the snake_case button. The converter detects camelCase word boundaries and splits them with underscores: 'myVariableName' becomes 'my_variable_name'.

Does this handle special characters?

The case converters handle standard alphanumeric characters. Special characters and punctuation are preserved in Upper, Lower, and Title case conversions. For programming case formats (camelCase, snake_case, etc.), non-alphanumeric characters are used as word separators.

Case Converter Tool

Why Use Our Case Converter?

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Complete Case Conversion Guide