Text Case Converter
Free online tool to convert text between uppercase, lowercase, title case, camelCase, snake_case, and more—instantly and unlimited.
Text Case Converter
Convert text between different cases instantly
Our text case converter is a free utility to transform text capitalization across multiple styles like uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case, and kebab_case. Ideal for writers, developers, and marketers, it provides real-time results without limits—ensuring clean, consistent formatting for content, code, or data.
Common Use Cases for Case Conversion
- ✓Writing and Editing
Standardize titles, sentences, or paragraphs for books, articles, or academic papers.
- ✓Programming and Code
Switch between camelCase, snake_case, or PascalCase for variable names, APIs, or configs.
- ✓SEO and Content Creation
Optimize headings or meta titles with title case for better search visibility and readability.
- ✓Data Processing
Clean CSV headers, JSON keys, or database fields by converting to consistent casing.
- ✓Social Media and Marketing
Format captions, bios, or ad copy in sentence case for professional, engaging posts.
- ✓Accessibility and UI Design
Ensure button labels or form text use title case for clear, uniform user interfaces.
Why Choose Our Converter?
Multiple Case Types
Supports uppercase, lowercase, title, sentence, camel, Pascal, snake, kebab, and constant cases
Real-Time Processing
Instant conversion as you type; handles up to 50,000 characters without delays
Preserves Content
Non-alphabetic characters (numbers, symbols, spaces) remain unchanged for accurate output
Batch and Multi-Select
Convert entire blocks or select specific options for mixed case transformations
Copy & Export Options
One-click clipboard or .txt download for seamless integration into documents or code
Cross-Device Friendly
Lightweight, mobile-responsive design works on desktops, tablets, and phones
How to Use the Text Case Converter
- Paste Text: Enter or input your text (e.g., "hello world") into the field
- Select Case: Choose from dropdown (e.g., Title Case) for the desired transformation
- View Results: See instant output (e.g., "Hello World") with side-by-side preview
- Adjust Options: Toggle for sentence detection or custom rules if needed
- Copy Output: One-click to clipboard or export for use in editors or apps
Understanding Text Case Conversion
Case conversion uses string methods like .toUpperCase(), .toLowerCase(), or custom logic for title/sentence (capitalize first word/letter). CamelCase lowercases initials after first, snake_case inserts underscores with lowercase, kebab_case uses hyphens similarly.
Example: "Hello World" → Title Case: "Hello World"; camelCase: "helloWorld"; snake_case: "hello_world".
- Basic Methods: Native JS for upper/lower; regex for splits in advanced cases
- Sentence Logic: Detects .?! endings to capitalize next letter
- Edge Handling: Preserves locales; ignores non-letters in casing
Implements via switch on case type, e.g., title: split words, capitalize each major.
Advanced Features & Capabilities
Custom Case Rules
Define exceptions for acronyms or specific words in title/sentence modes.
Locale Support
Handles accented characters in non-English text for global use.
Batch Processing
Convert multiple strings or files at once for large projects.
Frequently Asked Questions
What text cases are supported?
Our tool supports uppercase, lowercase, title case, sentence case, camel case, Pascal case, snake case, kebab case, and constant case conversions.
Is this tool free to use?
Yes! Our Text Case Converter is completely free to use with no limitations. You can convert text as many times as you need.
Can I convert large amounts of text?
Yes, our tool can handle large amounts of text efficiently. There are no character limits for conversion.
Does it preserve punctuation and numbers?
Yes, all non-alphabetic elements like symbols, numbers, and spaces are preserved during conversion.
How does title case work?
Title case capitalizes the first letter of major words (nouns, verbs, etc.) while lowercasing minor ones (articles, prepositions).
Is it suitable for code formatting?
Absolutely; use camel or snake case for variables, and Pascal for classes—perfect for developers.
Privacy & Formatting Considerations
This converter prioritizes secure, versatile text handling:
- Local Execution: No text transmitted—processes in-browser for confidentiality
- Consistency Tips: Use title for headers, sentence for body; test across fonts
- Best Practices: Combine cases for code (camel for JS, snake for Python)
- Related Tools: Pair with Remove Extra Spaces for polishing
Integration & Code Examples
Implement text case conversion in JavaScript with built-in and custom functions:
JavaScript Example:
// Function for common case conversions
function convertCase(text, caseType) {
switch (caseType) {
case 'uppercase':
return text.toUpperCase();
case 'lowercase':
return text.toLowerCase();
case 'title':
return text.toLowerCase().replace(/w/g, l => l.toUpperCase());
case 'camel':
return text.toLowerCase().replace(/[-_](.)/g, (_, c) => c.toUpperCase()).replace(/[^a-zA-Z0-9]/g, '');
case 'snake':
return text.toLowerCase().replace(/s+|[^a-zA-Z0-9]/g, '_');
// Add more cases...
default:
return text;
}
}
// Example usage
console.log(convertCase('Hello World', 'title')); // 'Hello World'
console.log(convertCase('hello-world', 'camel')); // 'helloWorld'
console.log(convertCase('Hello World', 'snake')); // 'hello_world'