Case Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, and more — instantly.
How to Use the Case Converter
- Paste or type your text into the input area.
- Click any format button — UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, or Toggle.
- The converted text appears instantly in the output area.
- Click Copy Output to copy the result to your clipboard.
The converter handles all standard Latin script text. Title Case capitalizes the first letter of every word. Sentence case capitalizes only the first letter of each sentence. camelCase and snake_case are particularly useful for developers naming variables, functions, or API endpoints.
Key Features
- 8 conversion formats — covers every common case style for writing and coding.
- Instant conversion — results appear as soon as you click a format button.
- Developer-friendly — camelCase, snake_case, and kebab-case for code naming conventions.
- No data upload — all processing is done locally in your browser.
- Free and unlimited — no account or subscription required.
Frequently Asked Questions
What is the difference between Title Case and Sentence case?
Title Case capitalizes the first letter of every word: “The Quick Brown Fox Jumps Over The Lazy Dog.” This is commonly used for article headings, book titles, and product names. Sentence case only capitalizes the first letter of the first word in each sentence: “The quick brown fox jumps over the lazy dog.” Sentence case is the default capitalization style for regular prose and is increasingly preferred in modern UI design for labels and button text because it reads more naturally.
What is camelCase used for?
camelCase is a naming convention widely used in programming where compound words are joined without spaces and each word after the first starts with a capital letter: myVariableName, getUserData, handleClickEvent. It is the dominant convention in JavaScript, Java, and TypeScript for variable and function names. Upper camelCase (also called PascalCase), where the first word is also capitalized, is used for class names and component names in most object-oriented languages.
What is snake_case and when should I use it?
snake_case joins words with underscores and uses all lowercase letters: user_profile, get_user_data, max_retry_count. It is the standard naming convention in Python for variables, functions, and module names (per PEP 8), and is also common in database column names and API parameter names. snake_case is generally considered more readable than camelCase for very long compound identifiers because the underscores create visual separation between words.
Can I convert mixed-language text?
The case converter works best with text that uses Latin script (English and most European languages). Non-Latin scripts like Chinese, Japanese, Korean, Arabic, and Hebrew do not have uppercase or lowercase distinctions, so UPPERCASE and lowercase conversions will leave those characters unchanged. camelCase, snake_case, and kebab-case conversions treat non-Latin characters as word-boundary characters, which may produce unexpected results in mixed-script text.