Case Converter
Change the capitalisation of any text instantly: UPPERCASE, lowercase, Title Case, Sentence case, plus developer cases like camelCase and snake_case.
How to use Case Converter
- Paste your text into the Input box.
- Click the case you want — the Output updates immediately and stays in sync as you edit.
- Copy the result or download it as a text file.
Features
12 case styles
From Sentence case to CONSTANT_CASE.
Smart Title Case
Keeps small words like “of” and “the” lowercase.
Developer cases
camelCase, PascalCase, snake_case and kebab-case for identifiers.
Private
Text is processed in your browser and never sent anywhere.
Frequently asked questions
What is the difference between Title Case and Capitalize Each Word?
Title Case follows editorial style: small words such as a, of, and stay lowercase unless they start the title. Capitalize Each Word capitalises every word without exception.
How does Sentence case work?
The whole text is lowercased, then the first letter of each sentence (after a full stop, question mark or exclamation mark) and of each line is capitalised. The pronoun “I” is also restored.
Can I convert code identifiers?
Yes. camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE split your text on spaces, punctuation and existing capital letters, so “userFirstName” becomes “user_first_name” in snake_case.
Is my text stored?
No. Conversion runs in your browser and nothing is saved or sent.