Text Case Converter — UPPER, lower, Title, Sentence Case and More

Copying text from one source often means inheriting its capitalization — ALL CAPS from a legal document, all lowercase from a chat, or random Mixed caps from who knows where. Fixing it manually is tedious. The CalcHub Text Case Converter converts text to any case format in one click, including programming-specific formats like camelCase and snake_case.

Available Conversions

Format	Example	Common Use
UPPER CASE	HELLO WORLD	Headings, emphasis, acronyms
lower case	hello world	Usernames, URLs, informal
Title Case	Hello World	Titles, headings
Sentence case	Hello world	Normal prose
camelCase	helloWorld	JavaScript variables, Java
PascalCase	HelloWorld	Classes, components, C#
snake_case	hello_world	Python, SQL, file names
kebab-case	hello-world	URLs, CSS classes, HTML
SCREAMING_SNAKE	HELLO_WORLD	Constants (Python, JS)
Alternate CaSe	hElLo WoRlD	Mocking text (SpongeBob meme)

How to Use It

1. Open CalcHub and find the Text Case Converter.
2. Paste or type your text in the input box.
3. Click the desired case format.
4. The converted text appears immediately — copy it with one click.

You can convert the same input to multiple formats in sequence without re-pasting.

Title Case Nuances

True title case follows rules about which words to capitalize. Prepositions (in, on, at, for), articles (a, an, the), and coordinating conjunctions (and, but, or) are typically lowercase unless they're the first or last word.

Simple capitalization: The Art Of War Proper title case: The Art of War

The converter uses AP Style or Chicago Manual of Style rules depending on the selected mode.

Programming Case Uses

Language	Variable Style	Class Style	Constant Style
JavaScript	camelCase	PascalCase	SCREAMING_SNAKE
Python	snake_case	PascalCase	SCREAMING_SNAKE
CSS	kebab-case	N/A	N/A
SQL	snake_case	N/A	UPPER_CASE
Java	camelCase	PascalCase	SCREAMING_SNAKE

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Why does Title Case vary between sources?

Different style guides have different rules. AP Style (journalism) lowercases prepositions of any length. Chicago Manual of Style lowercases prepositions under 5 letters. APA style has its own rules. The converter lets you choose a style guide.

How does the converter handle punctuation and numbers?

Punctuation and numbers are preserved in all conversion modes. Only letter characters are changed. So "Hello, World! 2026" in snake_case becomes "hello,_world!_2026" — keeping punctuation in place.

Can I convert code variable names from one convention to another?

Yes — this is one of the most practical uses. If you need to convert Python snake_case names to JavaScript camelCase (or vice versa), paste the names and select the target format. Multi-word conversions all work correctly.

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