Case Converter
Type or paste your text below, then pick a case. Everything runs on your device.
Free online case converter
This case converter instantly reformats any text into the case you need — whether you're cleaning up a heading, fixing accidental caps lock, or generating variable names for code. Just paste your text and tap a button to switch between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case and CONSTANT_CASE.
Your text is private
All conversions happen directly in your browser using plain JavaScript. Nothing you type is uploaded to a server or stored anywhere — close the tab and it's gone for good.
Frequently asked questions
What is the difference between Title Case and Sentence case?
Title Case capitalises the first letter of every word, which suits headlines. Sentence case only capitalises the first letter of each sentence, matching normal prose.
Which cases are best for programming?
camelCase and snake_case are common for variables, kebab-case suits URLs and file names, and CONSTANT_CASE is typically used for constants. Pick whichever matches your language's style guide.