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🔡 Text Case Converter
Paste text below and click a conversion button.
Result
What is a Text Case Converter?
A text case converter is a free online utility that transforms typed or pasted text into different letter-case formats with a single click. Whether you need UPPERCASE for legal headings, lowercase for social media handles, Title Case for book titles, or camelCase for programming variables, this tool handles all conversions instantly.
Writers use it to fix accidentally typed text when Caps Lock was on. Developers use camelCase for JavaScript variables, snake_case for Python functions, and kebab-case for CSS classes and URLs. Content creators use Title Case for headlines and Sentence case for body copy. The tool saves hours of manual reformatting and eliminates typos introduced by manual editing.
How to Use the Text Case Converter
- Type or paste your text into the input box.
- Click the desired conversion button: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, or aLtErNaTiNg.
- The converted text appears in the output area below.
- 点击 Copy to copy the result to your clipboard.
Why Use Our Case Converter?
- 100% 免费 — No limits on text length or conversions per day.
- 无需注册 — Paste and convert without any sign-up.
- 基于浏览器 — Processing happens client-side; your text is never sent to a server.
- 8 Formats — Covers all major case styles including programming-friendly snake_case and kebab-case.
- One-Click Copy — Copy the result to clipboard instantly with the Copy button.
常见问题解答
Title Case capitalises the first letter of every word (e.g. "The Quick Brown Fox"). Sentence case only capitalises the first letter of the first word in each sentence, like normal writing (e.g. "The quick brown fox"). Title Case is used for headlines and book titles; Sentence case is used for body text and captions.
camelCase (e.g. myVariableName) is convention in JavaScript, Java, and Swift. snake_case (e.g. my_variable_name) is preferred in Python, Ruby, and SQL. kebab-case (e.g. my-variable-name) is standard for CSS class names and URL slugs. Always follow the conventions of your language or framework.
Yes, for UPPERCASE and lowercase the JavaScript toUpperCase() and toLowerCase() methods handle accented characters like é, ñ, ü correctly. For snake_case and kebab-case, non-ASCII characters are stripped to create safe identifiers. Title Case and Sentence case preserve special characters.
There is no artificial limit. The tool runs entirely in your browser, so performance depends on your device. In practice it handles thousands of words instantly. Very large documents (millions of characters) may take a fraction of a second on modern hardware.
要闻速览
- ✓ 100% 免费，无隐藏费用
- ✓ 无需帐户或登录
- ✓ 适用于任何浏览器
- ✓ 您的数据永远不会离开您的设备
- ✓ 8 case formats including camelCase and snake_case