How to use the case converter
- Type or paste your text. Anything goes — a sentence, a heading, a list of variable names or a whole document.
- Click a case style. Choose from UPPER CASE, lower case, Title Case, Sentence case and more. The result updates instantly and stays selected as you keep typing.
- Use developer styles. camelCase, PascalCase, snake_case, CONSTANT_CASE, kebab-case, Train-Case, dot.case and path/case split your words automatically and rejoin them in the chosen style — with one result per line if you wish.
- Copy or download. Copy the result, download it, or move it back into the input to chain conversions.
Common uses
- Fix text typed with Caps Lock on
- Format headings and titles correctly
- Convert names between code styles when refactoring (userName → user_name)
- Create URL slugs and file names with kebab-case
- Generate CONSTANT_CASE names for environment variables
Frequently asked questions
How do I convert text to uppercase or lowercase?
Paste your text and click UPPER CASE or lower case. The converted text appears in the result box ready to copy.
What is Title Case?
Title Case capitalises the main words of a heading while leaving short words such as “a”, “of” and “the” lowercase, except at the start or end.
What is the difference between Title Case and Capitalize Each Word?
Capitalize Each Word makes the first letter of every word uppercase, including small words. Title Case follows common headline style and keeps small words lowercase.
What is Sentence case?
Sentence case capitalises only the first letter of each sentence, like normal writing, and lowercases everything else.
How do I convert to camelCase or snake_case?
Click camelCase or snake_case. Words are detected from spaces, punctuation and existing camel humps, so “User Account-ID” becomes userAccountId or user_account_id.
Can I convert a list of variable names at once?
Yes. Put one name per line and keep “convert each line separately” ticked to get one converted name per line.
Is my text stored anywhere?
No. The conversion happens in your browser and your text is never uploaded.
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