Case Converter

Developer Quick Tips

• Use camelCase for JavaScript variable names, snake_case for database columns, kebab-case for URL slugs and CSS class names.
• Title case works for headers; sentence case for readable paragraphs. Both preserve punctuation and special characters.
• Paste text, select your target case mode, press Ctrl/Cmd+Enter. All processing runs locally in your browser.
• Unicode letters follow JavaScript locale-unaware mappings; numbers and punctuation stay intact during conversion.
• Chain with trim-lines or sort-lines for multi-step text workflows before or after case conversion.

Frequently asked questions

What is a case converter and how do I use it?

A case converter transforms text between different letter casing styles. Paste your text, select a case mode (uppercase, lowercase, title case, sentence case, snake_case, kebab-case, or camelCase), and press Ctrl/Cmd+Enter or click convert. All processing happens locally in your browser.

How do I convert text case online without uploading?

Case Converter runs entirely in your browser. Paste text, choose your target case mode, and convert. Your input never leaves your device and is not sent to any server or external service.

What case modes does this tool support?

Case Converter supports seven modes: uppercase (ALL CAPS), lowercase (all lowercase), title case (Each Word Capitalized), sentence case (First word capitalized.), snake_case (words_with_underscores), kebab-case (words-with-hyphens), and camelCase (wordsWithoutSpaces).

Is Case Converter free and do I need an account?

Yes, Case Converter is completely free with no account or login required. Processing happens on your device, and you can use it immediately without any sign-up.

How does Case Converter handle Unicode and special characters?

Unicode letters follow JavaScript locale-unaware case mappings. Numbers, punctuation, and symbols are preserved according to the selected case mode. Non-letter characters remain unchanged during conversion.

Will my input be stored after I close the browser tab?

No. Input stays in memory only while the page is open. Closing the tab clears all input data. Your browser theme preference is stored locally but is not tool input.

Related tools

• Trim Lines: Trim leading and trailing whitespace from each line locally. Preserves inner spaces and blank lines. Free, browser-based, no upload.
• Sort Lines: Order and sort lines alphabetically online with numeric-aware, case-insensitive comparison. Free browser tool, no upload, no account needed.