Case Converter
This case converter changes your text into every case at once. Paste a word, a headline, or a paragraph, and you'll see it in UPPERCASE, lowercase, Title Case, Sentence case, and the code styles camelCase, PascalCase, snake_case, and kebab-case, each with a copy button. It updates live as you type, and since it runs in your browser, your text stays private.
- Upper & lower
- Title & sentence
- camelCase
- snake & kebab
- Copy any case
Last updated June 17, 2026 Eight cases at once Reviewed by the Calcowa team
What does a case converter do?
A case converter rewrites your text with a different pattern of capital and lowercase letters, without you retyping a thing. The everyday cases are simple: uppercase shouts, lowercase whispers, Title Case suits headlines, and Sentence case reads like normal writing. The code cases pack words together for programming, where spaces aren't allowed, so camelCase, PascalCase, snake_case, and kebab-case each join the words a different way. This tool shows all eight at once from a single box, so you'll copy whichever one fits, whether you're cleaning up a heading or naming a variable. It's quicker than a word processor's menus, and there's nothing to install. It runs in your browser, so the text stays with you and doesn't get sent anywhere.
The cases at a glance
Here's how the phrase hello world looks in each case. The tool does the same for any text you paste, however long, so you don't have to picture it; you'll see your own text transformed live.
| Case | hello world becomes |
|---|---|
| UPPERCASE | HELLO WORLD |
| lowercase | hello world |
| Title Case | Hello World |
| camelCase | helloWorld |
| snake_case | hello_world |
| kebab-case | hello-world |
Frequently asked questions
Paste your text and the case converter shows it in every case at once, so you copy the one you want. Uppercase capitalizes every letter, lowercase drops them all, and the tool does both instantly as you type. It's quicker than retyping or hunting through a word processor's menus, and nothing you paste leaves your browser, so it's safe for private text too.
Title Case capitalizes the first letter of every word, the way headlines often look, while Sentence case capitalizes only the first letter of each sentence, like normal prose. So the same phrase becomes The Quick Brown Fox in title case and The quick brown fox in sentence case. The converter shows both, so you'll pick the one your style guide wants.
They're naming styles programmers use, since code can't have spaces. camelCase joins words and capitalizes each after the first, like myVariableName. snake_case joins them with underscores, like my_variable_name, and kebab-case uses hyphens, like my-variable-name. PascalCase is camelCase with the first word capitalized too. The tool generates all of them from your text.
Yes. Paste a sentence, a paragraph, or a longer block and every case updates together. Title and sentence case keep your line breaks and punctuation, while the code cases strip spaces and join the words. There's no length limit worth worrying about, so it handles a short label or a full page just the same.
Title, sentence, upper, and lower case leave numbers and symbols in place and only change letters. The code cases, camel, Pascal, snake, and kebab, keep letters and numbers but drop spaces and most punctuation, since that's how identifiers are written. If you need the symbols preserved, use the title or sentence output instead.
Yes to both. There's no sign-up, no limit, and nothing to install, since it runs in your browser. Whatever you paste stays on your device and isn't sent anywhere. Bookmark it for writing headlines, cleaning up a label, or naming variables, and you'll have every case a click away.
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