Text Case Converter
Convert text between different cases instantly.
What the Text Case Converter does
This tool instantly rewrites any text into one of eight common letter cases without changing the words themselves. Paste a sentence, a paragraph or a whole document, click the case you want, and the converted version appears ready to copy. Everything runs locally in your browser, so even large blocks of text are transformed the moment you click and nothing is uploaded anywhere.
It is built for writers fixing an accidental caps-lock paragraph, editors enforcing a house style, and developers who need to switch an identifier between camelCase, PascalCase, snake_case and kebab-case. Instead of retyping or hunting through a word processor's menus, you get every format from a single screen.
The eight cases explained
UPPER CASE and lower case do exactly what they say. Title Case capitalises the first letter of every word, which suits headlines and titles, while Sentence case capitalises only the first word of each sentence, like ordinary prose. These four are the ones writers reach for most.
The remaining four are programming conventions. camelCase joins words with no spaces and lowercases the first letter (myVariableName); PascalCase is the same but capitalises the first letter too (MyClassName); snake_case separates words with underscores (my_variable_name); and kebab-case separates them with hyphens (my-variable-name). Each language and framework has its own preferred style, so being able to flip between them quickly saves real time.
How to use it
Type or paste your text into the input box, then click any of the eight case buttons. The result shows up underneath with a Copy button, and the active format is highlighted so you always know which conversion you are looking at. You can click a different button at any time to re-convert the same input, and there is no length limit because the work happens entirely on your device.