Case Converter – Change Text Case Instantly
Convert text to UPPERCASE, lowercase, Sentence case, Title Case, camelCase, snake_case and more. Paste your text, pick a case, and copy the result. Free, no sign-up, and everything runs in your browser — nothing is stored or uploaded.
This free case converter changes the letter case of your text in one click — no retyping and no manual editing. Paste or type your text, pick a case, and copy the result. It converts to UPPERCASE, lowercase, Sentence case, Title Case, aLtErNaTiNg case, and developer formats like camelCase, PascalCase, snake_case, and kebab-case. It is made for writers fixing headings, students formatting titles, marketers preparing copy, and developers converting variable and file names. Anyone who has ever retyped a sentence just to fix its capitalization will save time here. Everything runs in your browser — nothing is stored on a server, and your text stays saved locally so it is there when you return. Paste your text above and pick a case to get started.
What does this tool do?
It rewrites your text in whichever case you choose, instantly. Available cases:
- UPPERCASE — every letter capitalized.
- lowercase — every letter in small case.
- Sentence case — first letter of each sentence capitalized.
- Title Case — each major word capitalized, minor words (a, the, of…) kept lowercase.
- aLtErNaTiNg case — letters alternate between lower and upper.
- camelCase / PascalCase — words joined, for variable and class names.
- snake_case / kebab-case — words joined by underscores or hyphens.
Why use this tool?
Fixing capitalization by hand is slow and easy to get wrong — especially with a long heading, a list of titles, or text that arrived in ALL CAPS. A case converter does it in one click and applies the rules consistently every time. It is just as useful for developers, who constantly switch identifiers between camelCase, snake_case, and kebab-case across languages and file names.
How the tool works
- UPPERCASE / lowercase apply directly to every letter.
- Sentence case lowercases the text, then capitalizes the first letter after the start and after each sentence-ending mark (. ! ?).
- Title Case capitalizes each word but keeps common minor words (articles, short prepositions, conjunctions) lowercase — unless they are the first or last word.
- camelCase, PascalCase, snake_case, kebab-case split your text into words, drop the spaces, and rejoin them in the chosen format.
- Word and character counts update as you type, and your text is saved in your browser.
How to use the tool
- Type or paste your text into the box.
- Click the case you want — the text updates immediately.
- Not right? Click a different case to reconvert.
- Click Copy to grab the result, or Clear to start over.
Practical examples
Fixing ALL CAPS
Paste "THIS IS A HEADLINE", click Sentence case, and get "This is a headline" without retyping.
Formatting a title
"the lord of the rings" in Title Case becomes "The Lord of the Rings" — minor words stay lowercase.
Developer variable
"user first name" converts to userFirstName (camelCase) or user_first_name (snake_case) in one click.
URL-style slug
"My Blog Post Title" in kebab-case becomes my-blog-post-title, ready for a filename or handle.
Common use cases
- Writers & editors: fixing headings and titles quickly and consistently.
- Students: formatting essay titles and references.
- Marketers: cleaning up copy pasted from different sources.
- Developers: converting identifiers between camelCase, PascalCase, snake_case, and kebab-case.
- Data entry: normalizing inconsistent capitalization in lists.
Tips & best practices
- Use Title Case for headlines and Sentence case for body text and subheadings.
- For developer formats, keep names meaningful — the converter joins whatever words you give it.
- Convert in stages if needed: lowercase first, then Title Case, to clean up messy input.
- Paste plain text for the cleanest result; formatting from documents can carry hidden characters.
Frequently Asked Questions
What is the difference between Title Case and Sentence case?
Title Case capitalizes each major word (great for headlines). Sentence case capitalizes only the first word of each sentence, like normal prose.
Which words stay lowercase in Title Case?
Common minor words — articles (a, an, the), short conjunctions (and, or, but), and short prepositions (of, in, to) — unless they are the first or last word of the title.
What are camelCase, snake_case and kebab-case for?
They are naming conventions used in programming. camelCase and PascalCase are common for variables and classes; snake_case and kebab-case are used for variables, file names, and URL slugs.
Can I convert text back after changing it?
Yes. Just click another case. Note that some conversions lose information — for example, once text is lowercased, the tool cannot know which words were originally proper nouns.
Is there a limit on how much text I can convert?
No fixed limit. You can convert a single title or a long document, and it happens instantly.
Does it work on mobile?
Yes. The buttons and text area adapt to phones and tablets, so you can convert text on any device.
Will my text be saved?
Your text is stored in your browser's local storage and restored when you come back. Clearing your browser data removes it.
Is my text private?
Yes. All conversion happens in your browser. Your text is never uploaded to or stored on a server.
Is the case converter free?
Completely free, with no account and no limit on how many conversions you make.