Case Converter
Convert text to UPPER, lower, Title, camelCase & more
🔒 100% free · no signup · files never leave your device
Text casing conventions are everywhere, and each context demands a different one. Headlines in US English style guides use Title Case, code uses camelCase for variables and snake_case for database columns, CSS classes prefer kebab-case, and environment variables scream in CONSTANT_CASE. Retyping text to match a convention — or fixing a paragraph that was accidentally typed with Caps Lock on — is tedious and error-prone by hand.
This free case converter transforms any text instantly: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE. Paste a headline, a variable name or an entire document and convert everything in one click, even very long texts, since the processing happens locally in your browser. It's the fastest way to fix miscased copy, normalize a list of headings, or convert between naming conventions when moving between code, spreadsheets and documents.
Why use Case Converter
Fixing Caps Lock accidents
An entire email typed in uppercase looks like shouting — one click restores normal sentence case without retyping.
Formatting headlines to style guides
Blog titles and documentation headings converted to consistent Title Case look professional across a whole site.
Converting naming conventions in code
Turn a spreadsheet column like 'User First Name' into userFirstName for an API or user_first_name for a database schema.
Normalizing imported data
Customer lists exported in ALL CAPS from legacy systems convert cleanly to proper case for mail merges.
Pro tips
- Title Case rules differ by style guide: AP lowercases short words like 'a', 'an', 'the' — give the result a quick scan for edge cases in formal writing.
- When converting to camelCase or snake_case, the tool splits on spaces and punctuation — acronyms like 'API key' become apiKey, not aPIKey.
- For SEO slugs and URLs, kebab-case is the convention; for CSS classes and HTML ids it's also the most readable choice.
- Sentence case is the safest default for UI labels and buttons — modern design systems (Google, Apple) have moved away from Title Case there.
How to use Case Converter
- 1Paste or type your text
- 2Click a case button
- 3Copy the converted text
Frequently Asked Questions
Which cases are supported?▾
UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE.
Is there a length limit?▾
No — conversion is instant even for very long texts, since everything runs in your browser.