Case Converter
Convert your text to any case format instantly. UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more.
📖 How to Use
Type or paste your text in the input box, then click any conversion button to transform it. The converted text appears instantly — click the copy button to use it anywhere.
Case Types Explained
UPPERCASE
Converts all letters to capitals. Used for headlines, emphasis, or constants in programming. Example: "HELLO WORLD"
lowercase
Converts all letters to small case. Useful for normalizing text or creating email addresses. Example: "hello world"
Title Case
Capitalizes the first letter of each word. Standard for book titles, headings, and article titles. Example: "Hello World"
Sentence case
Capitalizes only the first letter of each sentence. The most natural reading format. Example: "Hello world. This is great."
camelCase
No spaces, each word after the first is capitalized. Standard in JavaScript and Java for variable names. Example: "helloWorld"
snake_case & kebab-case
Words joined with underscores or hyphens. Common in Python (snake_case) and CSS/URLs (kebab-case). Example: "hello_world" or "hello-world"
When to Use Case Conversion
Case conversion comes up more often than you'd think. Writers use it to fix accidentally typed caps lock text. Developers use it to convert between naming conventions when switching programming languages. SEO professionals use title case for meta titles and sentence case for descriptions.
If you're working with CSV files or databases, normalizing text case before importing prevents duplicate entries caused by inconsistent capitalization. Converting "New York", "new york", and "NEW YORK" to a single format saves hours of cleanup.
Frequently Asked Questions
What's the difference between Title Case and Sentence case?
Title Case capitalizes the first letter of every word ("The Quick Brown Fox"). Sentence case only capitalizes the first letter of each sentence ("The quick brown fox"). Title Case is used for headings; Sentence case is for regular text.
When should I use camelCase vs snake_case?
camelCase is the convention in JavaScript, Java, and TypeScript. snake_case is standard in Python, Ruby, and database column names. kebab-case is used in CSS class names and URLs. Use whatever your language or framework expects.
Is my text stored anywhere?
No. All conversion happens in your browser. Nothing is sent to a server — your text stays completely private.