Free Case Converter
Change text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, and more in one click. Free, unlimited, and 100% private.
A case converter changes the letter case of your text — to UPPERCASE, lowercase, Title Case, Sentence case, and more — in one click, without retyping. Humanit’s free case converter also offers camelCase, snake_case, and kebab-case for developers, and runs entirely in your browser so nothing is uploaded.
How it works
- 1Paste your text. Type or paste your text into the case converter above.
- 2See results instantly. The numbers update live as you type — there’s no button to press.
- 3Edit and re-check. Tweak your text and watch the results change in real time.
Every case in one click
Paste your text, click a case, and it transforms in place — then copy it out. Sentence case capitalizes the first letter of each sentence; Title Case capitalizes each major word (skipping small words like “a”, “of”, and “the”); Capitalized Case capitalizes every word. UPPERCASE and lowercase do exactly what they say.
Cases for developers
camelCase, snake_case, and kebab-case convert a phrase into a single identifier — handy for variable names, file names, database columns, and URL slugs. “User profile image” becomes userProfileImage, user_profile_image, or user-profile-image instantly.
Fix CAPS LOCK mistakes fast
Typed a whole paragraph with Caps Lock on? Paste it and hit Sentence case to fix it in one click instead of retyping. The same trick rescues text pasted from a PDF or a shouting email.
Free, unlimited, and private
The case converter is free with no sign-up and no limit on how much text you process. Because it runs entirely in your browser, your text is never sent to a server, stored, or used to train any AI — it never leaves your device. When you’re ready to do more with your writing, Humanit’s AI humanizer and AI detector are one click away.
| Case | Example |
|---|---|
| Sentence case | The quick brown fox. |
| lowercase | the quick brown fox. |
| UPPERCASE | THE QUICK BROWN FOX. |
| Title Case | The Quick Brown Fox |
| camelCase | theQuickBrownFox |
| snake_case | the_quick_brown_fox |
Frequently asked questions
How do I convert uppercase to lowercase?
Paste your text, click “lowercase,” and every letter is lowercased instantly. Then use the Copy button to grab the result.
What is the difference between Title Case and Capitalized Case?
Title Case capitalizes major words but leaves small words like “a”, “of”, and “the” lowercase; Capitalized Case capitalizes the first letter of every word.
Does it support camelCase and snake_case?
Yes — it converts your text to camelCase, snake_case, and kebab-case as well as the standard writing cases, which is useful for code and slugs.
Is my text private?
Yes. The converter runs entirely in your browser, so your text is never uploaded or stored anywhere.
Do I need an account?
No. There’s no sign-up and no install — open the page and start typing.
Does it work on mobile?
Yes — it works in any modern browser on phone, tablet, or desktop.
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Open the AI HumanizerLast updated: May 2026