Uppercase to Lowercase Converter - Text Case Changer Online
Convert text between uppercase and lowercase instantly with our free text case converter. Whether you need to fix caps lock mistakes or transform text for professional use, our tool handles all case conversions.
- Uppercase to lowercase: Convert CAPS LOCK TEXT to normal lowercase instantly
- Lowercase to uppercase: Transform quiet text to BOLD STATEMENTS
- Sentence case converter: Fix capitalization for proper sentences
- Developer case formats: camelCase, snake_case, kebab-case, PascalCase for coding
- Toggle case: Swap uppercase and lowercase letters throughout your text
Essential for writers, developers, and anyone who needs to quickly change text capitalization without retyping everything.
Welcome to Change Case
Change Case is a free online tool that allows you to easily convert text between different cases: lower case, upper case, sentence case, title case, alternating case, inverse case, and many more. You can also use it to convert text to camel case, snake case, kebab case, Pascal case, constant case, dot case, path case, header case, param case, and more.
Why use Change Case?
There are many reasons why you might want to convert text to different cases. For example, you might want to make text stand out by using all capital letters. Or you might want to convert a long string of words to a more readable format. Whatever your reason, Change Case makes it easy to convert text to any case you need.
How to use Change Case
Using Change Case is simple. Just enter the text you want to convert into the text box, and then choose the case you want to convert it to. You can then copy the converted text to your clipboard, or clear the text box to start over.
Frequently Asked Questions
Common questions about text case conversion, programming case styles, and fixing capitalization.
What is PascalCase?
PascalCase (also called UpperCamelCase) capitalizes the first letter of each word with no separators: MyVariableName, CalculateTotalPrice. Used for class names in most programming languages (Java, C#, Python), React component names, and TypeScript interfaces. Each word within the name starts with a capital letter.
What is SCREAMING_SNAKE_CASE?
SCREAMING_SNAKE_CASE (or CONSTANT_CASE) uses all uppercase letters with underscores between words: MAX_FILE_SIZE, API_BASE_URL. It's the standard convention for constants and environment variables in most programming languages. The screaming name comes from the all-caps format that resembles shouting.
What is dot.case?
Dot case uses periods to separate words: my.variable.name, user.profile.settings. Common in Java package names (com.example.myapp), file extensions, configuration properties, and object notation. Also called dot notation when used for accessing object properties in programming languages like JavaScript.
When should I use lowercase vs UPPERCASE?
Use lowercase for variable names, URLs, hashtags, and casual communication. Use UPPERCASE for constants, acronyms, emphasis (sparingly), and headers in ASCII documentation. Avoid all-caps in emails and messages as it reads as shouting. For readability, sentence case or title case work better for long text.
How to convert text to sentence case
Sentence case capitalizes only the first word and proper nouns in a sentence.
- Open a case converter tool
- Paste your text into the input box
- Select "Sentence case" from the options
- Copy the converted result
What is path/case?
Path case uses forward slashes between words: my/variable/name, user/profile/settings. Named after URL paths and file system paths. Used primarily for RESTful API endpoints, file paths, and routing in web frameworks. Similar to kebab-case but with slashes instead of hyphens.
What is Train-Case?
Train-Case (or HTTP-Header-Case) capitalizes each word and separates them with hyphens: Content-Type, Accept-Language, X-Custom-Header. Standard format for HTTP headers. Named because it resembles train cars connected together. Also used in some CSS frameworks and configuration files.
How to fix accidental caps lock text
Quickly convert accidentally typed CAPS LOCK text to normal lowercase or sentence case.
- Open a case converter tool
- Paste your all-caps text
- Select "lowercase" or "Sentence case" to convert
- Copy the corrected text
What is the alternating case style?
Alternating case (aLtErNaTiNg CaSe) switches between lowercase and uppercase for each letter. Made famous by the Mocking SpongeBob meme to indicate sarcasm or mockery. It's not used in programming but popular on social media for humorous effect. Use sparingly for comedic impact.
What is inverse case or toggle case?
Inverse case (or toggle case) reverses the capitalization of each letter: "Hello World" becomes "hELLO wORLD". Lowercase becomes uppercase and vice versa. Useful for correcting text typed with Caps Lock on, or creating visual effects. Different from alternating case which doesn't preserve original pattern.
