How to use the Case Converter
- Paste or type your text into the box.
- Click the style you want. Title Case keeps small words like "and", "of" and "the" lowercase, the way headlines are written.
- Use the second row to turn phrases into variable names: camelCase, PascalCase, snake_case, kebab-case or CONSTANT_CASE.
- Changed your mind? Click Undo. When you are happy, click Copy text.
About this tool
Sentence case capitalizes the first letter of every sentence and the word "I". Title Case follows common headline rules: it capitalizes major words and keeps short articles, conjunctions and prepositions lowercase unless they start or end the title. Capitalize Each Word capitalizes every word, and apostrophes are handled correctly, so "don't" never becomes "Don'T".
Frequently asked questions
What is Title Case exactly?
Title Case capitalizes the major words of a headline and keeps short words such as 'a', 'and', 'of' and 'the' lowercase unless they are the first or last word, for example 'The Lord of the Rings'. If you want every word capitalized, use Capitalize Each Word.
How does Sentence case work?
It lowercases everything first, then capitalizes the first letter of each sentence — the style of normal prose and paragraphs.
Is there a character limit?
No practical limit. Since everything runs in your browser with plain JavaScript, even very long documents convert instantly.
Will it ruin acronyms like NASA or HTML?
UPPERCASE and lowercase modes convert every letter, so acronyms change too. If your text contains acronyms you want to preserve, convert first and then fix those few words manually.