Convert Case Online
Instantly convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, and more. Paste, click, copy — done.
How to Convert Text Case
Three steps, under ten seconds.
Paste your text
Type or paste any text into the input box above. There is no limit on length — paste entire documents if you need to.
Select a case format
Click UPPERCASE, Title Case, camelCase, or any other format button. The converted result appears instantly in the output box.
Copy the output
Click the Copy button to send the converted text to your clipboard, then paste it wherever you need it.
About This Case Converter
Changing text case manually is tedious — especially when you need to reformat dozens of variable names, headings, or lines of copy. This tool handles all the common capitalization styles used by developers, writers, and SEO professionals in one place.
UPPERCASE and lowercase are the most basic transforms: every letter goes either fully capital or fully small. Title Case capitalizes the first letter of every word, making it ideal for headings, book titles, and product names. Sentence case mimics normal prose — only the first word of each sentence starts with a capital letter.
For code, camelCase removes spaces and capitalizes each subsequent word, producing names like myVariableName. snake_case replaces spaces with underscores and lowercases everything, giving my_variable_name — standard in Python and SQL. kebab-case does the same with hyphens, producing my-variable-name — the go-to format for URL slugs and CSS class names.
All processing runs entirely in your browser. No text is sent to any server, so you can convert sensitive or proprietary content with full confidence.
Frequently Asked Questions
What is a case converter?
A case converter is a tool that automatically changes the capitalization style of text. Instead of retyping or manually editing every word, you paste your text, choose a format like UPPERCASE or camelCase, and the tool transforms it instantly. It is useful for writers, developers, SEO professionals, and anyone who frequently reformats text.
What is the difference between Title Case and Sentence case?
Title Case capitalizes the first letter of every word — for example, "The Quick Brown Fox". Sentence case only capitalizes the first word of each sentence, and leaves everything else lowercase — for example, "The quick brown fox. It jumps over the lazy dog." Title Case is common in headings and book titles, while Sentence case is standard in body text and most editorial writing.
What is camelCase used for?
camelCase joins words by capitalizing the first letter of each word after the first, with no spaces — for example, myVariableName. It is the standard naming convention in JavaScript, Java, Swift, and TypeScript for variable names, function names, and object properties.
What are snake_case and kebab-case used for?
snake_case uses underscores to join words and keeps everything lowercase — for example, my_variable_name. It is common in Python, Ruby, and SQL. kebab-case uses hyphens instead — for example, my-variable-name. It is widely used in HTML attributes, CSS class names, and URL slugs because hyphens are URL-safe and preferred by search engines.
Is my text stored anywhere when I use this tool?
No. All text processing happens entirely in your browser using JavaScript. Your text is never sent to any server, stored in a database, or seen by anyone. You can safely convert confidential documents, source code, or any sensitive content without privacy concerns.
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