Case
Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more.
How It Works
Enter Text
Type or paste the text you want to convert.
Pick a Case
Choose from 9 case styles including camelCase and snake_case.
Copy
Copy the converted text to your clipboard instantly.
Convert text case online between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE, and dot.case. ConverterUp's case converter is a fast helper for developers renaming variables, copywriters cleaning headlines, and SEO specialists normalizing slugs. Paste your input, click the format you need, and copy the result with one tap. The text is processed entirely in your browser, so blog drafts, code snippets, and internal product names never leave your device or get logged on a third-party server.
Frequently asked questions
How does Title Case differ from Sentence case?
Title Case capitalizes the first letter of each significant word, like in book titles. Sentence case capitalizes only the first letter of the sentence and proper nouns, which is the standard for body copy.
Does case conversion preserve numbers and punctuation?
Yes. Digits, punctuation, and emoji are kept untouched. The tool only changes letter casing and adjusts separators (underscore, hyphen, dot) when converting to programmer-friendly cases.
Does it handle Portuguese and Spanish accents correctly?
Yes. The converter is fully Unicode-aware, so accented letters such as á, ã, ç, ñ, and ü keep their diacritics and convert their case correctly in either direction.
Is there a maximum text length?
Up to 1 MB of plain text, which equals roughly 200,000 words. The transformation is instant for any realistic input thanks to native browser string APIs.