Case Converter

The Case Converter is a free online tool that instantly transforms your text between multiple letter cases. Whether you accidentally typed in all caps, need to format a headline for an article, or want to convert variable names for your code — just paste your text, click a button, and copy the result.

Supporting over 12 conversion modes including standard text cases and developer-friendly naming conventions, this tool handles everything from quick formatting fixes to bulk text transformation. It runs entirely in your browser — your text never leaves your device.

• Standard text cases: Sentence case, lower case, UPPER CASE, Capitalized Case, Title Case
• Creative cases: aLtErNaTiNg CaSe, InVeRsE CaSe for social media and stylistic use
• Developer cases: camelCase, PascalCase, snake_case, kebab-case, dot.case, CONSTANT_CASE
• Live character, word, and line counter updates as you type
• One-click copy to clipboard — no manual selecting needed
• Download as .txt file for longer text conversions
• Instant conversion — no server round-trip, everything runs in your browser
• Works on mobile — fully responsive, paste and tap to convert

1. Enter your text: Type directly into the text area or paste content from any source — documents, emails, code editors, or web pages.
2. Click a conversion button: Choose from Sentence case, lower case, UPPER CASE, Capitalized Case, Title Case, aLtErNaTiNg, InVeRsE, or any of the developer case formats.
3. Review the result: Your text is instantly converted in the same text area. The character, word, and line counters update in real time.
4. Copy or download: Click the Copy button to copy to your clipboard, or Download to save as a .txt file. Use Clear to start fresh.

Original text: the quick brown fox jumps over the lazy dog

Sentence case: The quick brown fox jumps over the lazy dog

UPPER CASE: THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG

Title Case: The Quick Brown Fox Jumps Over the Lazy Dog

camelCase: theQuickBrownFoxJumpsOverTheLazyDog

snake_case: the_quick_brown_fox_jumps_over_the_lazy_dog

kebab-case: the-quick-brown-fox-jumps-over-the-lazy-dog

aLtErNaTiNg: tHe QuIcK bRoWn FoX jUmPs OvEr ThE lAzY dOg

• Save time: No need to retype text — convert thousands of words in a single click
• Fix caps lock mistakes: Accidentally typed in all caps? Convert to sentence case instantly
• Format headlines: Properly capitalize titles and headings using Title Case rules
• Code faster: Convert plain text to camelCase, snake_case, or kebab-case for variable and file naming
• 100% private: Text never leaves your browser — no server processing, no data stored
• No registration: Free to use, no account needed, no limits on usage