Case Converter Online: Convert Text Between 12 Different Cases
Stop manually retyping text in different cases. Our case converter handles 12 case styles — from UPPERCASE to camelCase to kebab-case — with one click.
Try the tool right now
Case Converter
What is Case Conversion?
Case conversion is the process of changing the capitalization pattern of text. The most common conversions are uppercase (HELLO), lowercase (hello), and Title Case (Hello), but programming and content creation use many more specialized formats.
While typing in a different case manually is possible, retyping anything beyond a sentence wastes minutes that compound over a career. A good case converter handles every common style with one click and supports the programming-specific cases (camelCase, snake_case, kebab-case) that style guides require.
12 Common Text Cases Explained
UPPERCASE
Every letter capitalized. Used for headers, acronyms (NASA, HTTP), emphasis (BREAKING NEWS), and constants in code (MAX_SIZE).
lowercase
Every letter in lower case. Used for casual writing, URLs, file names, and email addresses.
Title Case
First Letter Of Each Word Capitalized. Used for book titles, article headings, and proper names. Style guides differ on whether short words (a, the, of) get capitalized.
Sentence case
First letter of each sentence capitalized, rest lowercase. Used for body text, blog post sentences, descriptions.
camelCase
firstWordLowercaseRestCapitalized. Used for variable and function names in JavaScript, Java, and many programming languages.
PascalCase
EveryWordCapitalizedNoSpaces. Used for class names in most object-oriented languages and React component names.
snake_case
all_lowercase_with_underscores. Used for variable names in Python, Ruby, and Rust, plus database column names.
kebab-case
lowercase-with-hyphens. Used for URL slugs, CSS class names, HTML attributes, and file names on the web.
CONSTANT_CASE
UPPERCASE_WITH_UNDERSCORES. Used for constants in many programming languages and environment variables (DATABASE_URL).
dot.case
lowercase.with.dots. Used in some configuration formats, package names (com.example.app), and namespacing.
aLtErNaTiNg CaSe
Alternates between lower and upper. Mostly used for memes, parody, and mocking text. Not standard in any technical context.
InVeRsE cAsE
Inverts the case of each character. Mainly a fun option, occasionally useful when text was accidentally typed with Caps Lock on.
When to Use Each Case
- Programming variables (most languages) — camelCase or snake_case (per language convention)
- Class names — PascalCase
- Constants — CONSTANT_CASE
- URL slugs — kebab-case (hello-world-blog-post)
- Database columns — snake_case
- File names (cross-platform safe) — kebab-case
- CSS classes — kebab-case (.my-button)
- HTML attributes — kebab-case (data-user-id)
- Article titles — Title Case
- Headings/emphasis — UPPERCASE (sparingly)
- Body content — Sentence case
How to Use Our Case Converter
Our case converter applies any of the 12 conversions instantly:
- Paste or type your text into the input box
- Click any case button to instantly convert your text
- The result appears below — copy with one click
- Try multiple cases on the same input to see which fits your need
- Use the 'Clear' button to reset
Programming Case Conventions by Language
JavaScript / TypeScript
Variables, functions, properties: camelCase. Classes, interfaces, types: PascalCase. Constants: CONSTANT_CASE. CSS classes: kebab-case.
Python
Variables, functions: snake_case. Classes: PascalCase. Constants: CONSTANT_CASE. PEP 8 enforces this strictly.
Ruby
Variables, methods: snake_case. Classes, modules: PascalCase. Constants: CONSTANT_CASE.
Java / C# / Go
Java: camelCase methods, PascalCase classes. C#: PascalCase methods AND classes. Go: PascalCase for exported, camelCase for unexported.
Common Mistakes in Case Conversion
- Mixing cases inconsistently — Pick one and stick with it across the project
- Using camelCase in URLs — Search engines prefer lowercase or kebab-case
- Title-casing everything — Most readers find headlines less natural with all major words capitalized
- Inconsistent capitalization in proper nouns — Names, brands, and acronyms have specific rules
- Auto-converting code — Don't run case conversion on entire code files; you'll break syntax
Final Thoughts
Case conversion is one of those tasks that takes 5 seconds with a tool but minutes manually. Whether you're converting an article title to Title Case, formatting a variable name in camelCase, generating a URL slug in kebab-case, or just yelling at someone in UPPERCASE, our free online case converter handles 12 different case styles with a single click. Everything runs in your browser, so even confidential text never leaves your device. Bookmark it next to your code editor — once you start using it, you'll never go back to manually retyping case styles.
Try Case Converter NowFrequently Asked Questions
What is the difference between camelCase and PascalCase?
camelCase starts with a lowercase letter (helloWorld), while PascalCase starts with an uppercase letter (HelloWorld). Both have no spaces, with each subsequent word capitalized. They're often confused but have specific uses in different programming languages.
When should I use snake_case vs kebab-case?
snake_case (hello_world) is standard in Python, Ruby, and SQL database columns. kebab-case (hello-world) is standard in URLs, CSS class names, and HTML attributes. Some languages don't allow hyphens in identifiers, which is why snake_case exists for code.
How does Title Case differ from Sentence case?
Title Case capitalizes the first letter of every major word ('How to Convert Text Cases'). Sentence case only capitalizes the first letter of the entire sentence and any proper nouns ('How to convert text cases'). Both are common in writing.
Will the converter handle special characters and accents?
Yes for case-changing operations (UPPERCASE, lowercase, Title Case). For programmatic cases (camelCase, snake_case), special characters are usually stripped because they're not valid in most programming identifiers.
Can I convert programming code with this tool?
You can, but be careful — case conversion will change identifier names, breaking compilation. Use it for individual variable names, not entire code files. Run it on text strings, not source files.
Is alternating case ever used professionally?
Almost never in serious contexts. It's primarily used for memes (mocking SpongeBob style), parody, or jokey emphasis. Not appropriate for code, professional writing, or business communications.
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