Uppercase and Lowercase Converter
Change any text to all capital letters or all small letters. It is the quickest way to fix text that was typed with caps lock on or to prepare text for headings and labels.
Case Converter
Change your text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and more in one click. Fast, free and no signup.
- 100% free
- No Signup
- Works in your browser
Choose a case
Your text
Result UPPER CASE
Your text stays in your browser. Nothing is uploaded or stored.
How to change the case of text
1Paste your text
Type or paste your text in the input box.
2Choose a case
Click UPPER CASE, Title Case, camelCase or any other case.
3Copy the result
Copy the converted text or download it as a text file.
TEXT CASE GUIDE
Case Converter – Free Online Text Case Changer
Typed a whole paragraph with caps lock on, or need a perfect title for your blog post? Use this free online case converter to change the case of your text in one click. Convert text to UPPERCASE, lowercase, Title Case, Sentence case, Capitalize Each Word, aLtErNaTiNg case and iNVERSE case, or turn it into developer formats such as camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE and dot.case. The result appears instantly, and you can copy it, download it or convert it again. There is nothing to install and no signup, and your text never leaves your browser.
Title Case and Sentence Case
Create clean headlines with Title Case, or fix paragraphs with Sentence case, which capitalizes the start of each sentence and the word I.
camelCase, snake_case and More
Convert phrases into naming styles used by developers, such as camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE and dot.case.
How to Use the Case Converter
- Enter your text: Type in the Your text box, or use the Paste button to insert text from your clipboard.
- Pick a case: Click one of the case buttons. The converted text shows in the Result box immediately and updates while you type.
- Use the result: Click Copy to copy the result, or Download .txt to save it as a file.
- Convert again: Click Use as input to move the result back to the input box, then choose another case if you want to combine steps.
All Text Cases Explained
- UPPER CASE: Every letter is a capital letter.
- lower case: Every letter is a small letter.
- Sentence case: The first letter of each sentence is a capital letter and the rest is lowercase, like normal writing.
- Title Case: The main words of a title start with a capital letter, while small words such as of, the and and stay lowercase, except at the start or end.
- Capitalize Each Word: The first letter of every word is a capital letter, including small words.
- aLtErNaTiNg case: Letters switch between small and capital one by one.
- InVeRsE case: Capital letters become small and small letters become capital.
- camelCase: No spaces, the first word is lowercase and every next word starts with a capital letter.
- PascalCase: No spaces and every word starts with a capital letter.
- snake_case: Lowercase words joined with underscores.
- kebab-case: Lowercase words joined with hyphens.
- CONSTANT_CASE: Uppercase words joined with underscores.
- dot.case: Lowercase words joined with dots.
Text Case Examples
Here is how the sample text my first blog post of the year looks in each case.
| Case | Result |
|---|---|
| UPPER CASE | MY FIRST BLOG POST OF THE YEAR |
| lower case | my first blog post of the year |
| Sentence case | My first blog post of the year |
| Title Case | My First Blog Post of the Year |
| Capitalize Each Word | My First Blog Post Of The Year |
| aLtErNaTiNg | mY fIrSt BlOg PoSt Of ThE yEaR |
| InVeRsE (from Hello World) | hELLO wORLD |
| camelCase | myFirstBlogPostOfTheYear |
| PascalCase | MyFirstBlogPostOfTheYear |
| snake_case | my_first_blog_post_of_the_year |
| kebab-case | my-first-blog-post-of-the-year |
| CONSTANT_CASE | MY_FIRST_BLOG_POST_OF_THE_YEAR |
| dot.case | my.first.blog.post.of.the.year |
Title Case vs Sentence Case: Which One Should You Use?
Title case is common for book titles, article headlines, blog post titles and headings in formal documents. Sentence case is common for normal paragraphs, user interface text, button labels and many modern website headings, because it is easier to read.
Title case rules are not the same everywhere. Different style guides such as APA, AP, MLA and Chicago treat small words and longer prepositions in slightly different ways. This tool uses a common list of small words, so always check your own style guide for important documents.
Programming Cases: When to Use Which
- camelCase: Variable and function names in JavaScript, Java, Swift and many other languages.
- PascalCase: Class names, type names and component names, for example in C#, TypeScript and React.
- snake_case: Variable names in Python and Ruby, and database table and column names.
- kebab-case: URLs, file names and CSS class names.
- CONSTANT_CASE: Constants and environment variable names.
- dot.case: Configuration keys and some package or namespace names.
The converter splits your text into words from spaces, underscores, hyphens, dots and even from existing camelCase text, so you can convert one naming style into another.
Common Uses of a Case Converter
- Fix caps lock mistakes: Turn a paragraph typed in capitals into normal sentence case without retyping it.
- Write headlines and titles: Format blog titles, article headings, video titles and product names.
- Prepare content for websites: Create URL slugs with kebab-case and clean headings.
- Rename variables and keys: Convert names between camelCase, snake_case and other styles when working on code, APIs and databases.
- Clean up data: Make names, addresses and lists consistent before importing them into a sheet or database.
- Create fun text: Use alternating and inverse case for social media posts and messages.
Does It Work for Urdu and Other Languages?
You can paste text in any language. Upper and lower case exist only in alphabets such as Latin, Greek and Cyrillic, so Urdu, Arabic, Hindi and Chinese letters stay unchanged, while English words mixed into the same text are converted normally.
Free Online Case Converter Without Installing Software
This online text case changer works in any modern web browser on desktop, tablet and phone. All conversions happen in your browser, so your text is never uploaded or stored. There is no software to install and no account to create. Bookmark the page and use it whenever you need to change text case quickly.
COMMON QUESTIONS
Frequently Asked Questions About Case Conversion
Find answers to common questions about uppercase, lowercase, title case, sentence case and programming naming cases.
What is a case converter?
A case converter is an online tool that changes the capital and small letters of your text. You paste your text, choose a case such as uppercase, lowercase, title case or sentence case, and the tool shows the converted text instantly.
How do I change text to uppercase or lowercase?
Type or paste your text into the input box and click UPPER CASE to make every letter a capital letter, or lower case to make every letter small. The result appears in the output box, where you can copy it with one click.
What is title case?
Title case capitalizes the main words of a title or heading, for example The Quick Brown Fox Jumps Over the Lazy Dog. Small words such as a, an, the, and, of and in stay in lowercase unless they are the first or last word. Style guides such as APA, AP, MLA and Chicago have slightly different rules, so check the one you need.
What is the difference between title case and capitalize each word?
Capitalize Each Word makes the first letter of every word a capital letter, including small words like of and the. Title Case follows the headline style and keeps small words in lowercase when the option is turned on.
What is sentence case?
Sentence case capitalizes only the first letter of each sentence and the word I, and makes everything else lowercase, just like normal writing. It is useful to fix text that was typed with caps lock on.
What is camelCase and where is it used?
camelCase joins words without spaces and starts each word after the first with a capital letter, for example myFirstVariable. It is widely used for variable and function names in JavaScript, Java and many other programming languages.
What is snake_case and kebab-case?
snake_case joins lowercase words with underscores, like my_first_variable, and is common in Python, Ruby and database column names. kebab-case joins lowercase words with hyphens, like my-first-page, and is common in website URLs and CSS class names.
What is PascalCase?
PascalCase is like camelCase but the first word is capitalized too, for example MyFirstClass. It is often used for class names and component names in programming.
What is CONSTANT_CASE?
CONSTANT_CASE writes all letters in uppercase and separates the words with underscores, for example MAX_FILE_SIZE. Many programming languages use it for constants and configuration values.
What does alternating case and inverse case do?
Alternating case switches between small and capital letters one letter at a time, like mY fIrSt PoSt. Inverse case swaps the case of every letter, so capitals become small and small letters become capitals. They are mostly used for fun text and social media posts.
Does the case converter work with Urdu and other languages?
The tool works with any text, but upper and lower case only exist in some alphabets, such as Latin, Greek and Cyrillic. Urdu, Arabic, Hindi and Chinese do not have capital letters, so those characters stay the same, while any English words in the same text are converted.
Can I convert many lines of text at once?
Yes. You can paste a whole paragraph or a long list. For the developer cases such as camelCase and snake_case, each line is converted separately and your line breaks are kept.
Is my text saved or uploaded anywhere?
No. The conversion happens in your browser. Your text is not sent to a server and is not stored, and it disappears when you close or refresh the page.
Is this case converter free?
Yes. The case converter is completely free to use, with no signup and no limits.
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