Case Converter – Change Text Case Online (Upper, Lower, Title & More)
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, and more. Our free case converter handles all text transformations instantly—perfect for formatting names, titles, code, and content.
What Is a Case Converter?
A case converter changes the capitalization of text. Whether you need all caps, all lowercase, proper title formatting, or specialized cases for programming, this tool handles all common case transformations.
Case Types Available
| Case | Example | Use For |
|---|---|---|
| UPPER CASE | HELLO WORLD | Headings, emphasis |
| lower case | hello world | Normalization |
| Title Case | Hello World | Titles, names |
| Sentence case | Hello world | Sentences |
| camelCase | helloWorld | Programming |
| PascalCase | HelloWorld | Class names |
| snake_case | hello_world | Python, databases |
| kebab-case | hello-world | URLs, CSS |
| CONSTANT_CASE | HELLO_WORLD | Constants |
| aLtErNaTiNg | hElLo WoRlD | Memes, sarcasm |
| InVeRsE CaSe | hELLO wORLD | Effect |
How to Use
Step 1: Paste Your Text
Enter text in any case format.
Step 2: Select Target Case
Choose your desired case type.
Step 3: Copy Result
One-click copy transformed text.
Common Use Cases
Writing & Editing
- Fix CAPS LOCK mishaps
- Format titles correctly
- Normalize inconsistent text
- Create headlines
Programming
- Convert variable names between conventions
- Transform database column names
- Generate code constants
- Normalize identifiers
Data Processing
- Clean imported data
- Standardize name fields
- Format email addresses (lowercase)
- Process CSV data
SEO & Marketing
- Format meta titles
- Create URL slugs
- Standardize brand names
- Format headings
Case Rules Explained
Title Case
Capitalize First Letter Of Each Word
- Capitalize: Nouns, verbs, adjectives, adverbs
- Lowercase: Articles (a, an, the), short prepositions (of, in, to)
- Varies: Style guides differ on rules
Sentence Case
Only first letter capitalized.
- First word capitalized
- Proper nouns capitalized
- Rest lowercase
camelCase (Lower)
firstWordLowerThenCapitalize
- First word all lowercase
- Subsequent words capitalized
- No spaces or separators
- Common in JavaScript, Java
PascalCase (Upper)
EachWordStartsCapital
- Every word capitalized
- No spaces or separators
- Common for classes in many languages
snake_case
words_separated_by_underscores
- All lowercase
- Underscores between words
- Common in Python, databases
kebab-case
words-separated-by-dashes
- All lowercase
- Hyphens between words
- Common in URLs, CSS
Frequently Asked Questions
What's the difference between camelCase and PascalCase?
camelCase starts with a lowercase letter (firstName). PascalCase starts with uppercase (FirstName). Both are commonly used in programming.
How does Title Case handle small words?
Style guides vary. AP Style lowercases articles and short prepositions; other styles may differ. Our tool follows common English conventions.
Can I batch convert multiple lines?
Yes! Paste multiple lines and each will be converted with the same rule.
Does it preserve line breaks?
Yes, line breaks and paragraph structure are maintained.
What about special characters?
Most special characters are preserved. Only letter case changes.
How do I handle names with mixed case (McDonald)?
Automatic tools may not handle all edge cases. Review results for special names.
Programming Case Conventions
| Language | Variables | Classes | Constants |
|---|---|---|---|
| JavaScript | camelCase | PascalCase | SCREAMING_SNAKE |
| Python | snake_case | PascalCase | SCREAMING_SNAKE |
| Java | camelCase | PascalCase | SCREAMING_SNAKE |
| CSS | kebab-case | — | — |
| SQL | snake_case | — | — |
| Ruby | snake_case | PascalCase | SCREAMING_SNAKE |
Related Tools
Explore more text utilities:
- Text Formatter — Full text formatting
- Find & Replace — Search and replace
- Slug Generator — URL slugs
- Random Word Generator — Random words
- Character Counter — Text stats
Pro Tips
- Match conventions — Use the case your codebase/style guide requires
- URL friendly — Use kebab-case for web URLs
- Check edge cases — Verify proper nouns and abbreviations
- Be consistent — Pick one naming convention per project
- Preserve originals — Keep unmodified text for reference
Title Case Style Guides
Different publications use different rules:
| Style | Treatment of "to" |
|---|---|
| AP | Lowercase |
| Chicago | Lowercase |
| APA | Capitalize |
| MLA | Lowercase (if preposition) |
When in doubt, follow your organization's style guide.
Convert text case above—from CAPS to lowercase, Title Case to snake_case. Essential for writers, developers, and data processing!