How Case Converter Works
Each mode applies a different rule to your text. UPPERCASE and lowercase simply change every letter's case. Title Case and Sentence case capitalize the first letter of each word or sentence while lowercasing the rest. camelCase and snake_case first break the text into individual words, then rejoin them using programming naming conventions — no spaces, with capitalization or underscores marking word boundaries.
How to Use This Tool
- Type or paste the text you want to convert.
- Choose a case style from the dropdown.
- Select Convert to generate the result.
- Use Copy Result to copy the converted text to your clipboard.
Example
Converting "the quick brown fox" gives: UPPERCASE → THE QUICK BROWN FOX, Title Case → The Quick Brown Fox, camelCase → theQuickBrownFox, snake_case → the_quick_brown_fox.
Helpful Tips
- Sentence case is useful for cleaning up text that was typed entirely in caps or lowercase, like old form submissions.
- camelCase and snake_case are handy when turning a phrase into a variable or file name for code.
- Title Case here capitalizes every word, including short ones like "a" and "the" — edit the result manually if you need editorial-style title casing that lowercases minor words.
Frequently Asked Questions
What's the difference between Title Case and Sentence case?
Title Case capitalizes the first letter of every word, while Sentence case only capitalizes the first letter of each sentence and lowercases the rest.
How is camelCase generated from a sentence?
The text is split into words, the first word is lowercased, and every following word has its first letter capitalized, with all spaces removed.
Does snake_case keep numbers and punctuation?
Numbers are kept; punctuation is stripped and word boundaries are marked with a single underscore.
Can I convert multiple paragraphs at once?
Yes, all case modes work on the full contents of the input box, including multiple lines and paragraphs.
This tool runs entirely in your browser. Your input is not uploaded to any server.