Convert text between different letter cases: UPPERCASE, lowercase, Title Case, Sentence case, and Capitalized Case.
All letters are converted to capital letters. Numbers and special characters remain unchanged.
Example: "hello world" → "HELLO WORLD"
Common uses: Headlines, acronyms, titles for emphasis, legal documents, urgent messages, code constants.
All letters are converted to lowercase. Numbers and special characters remain unchanged.
Example: "HELLO WORLD" → "hello world"
Common uses: Code syntax, email addresses, URLs, hashtags, casual writing, variable names in programming.
The first letter of each word is capitalized, and the remaining letters are lowercase. Small words like "and", "the", "or", and "in" may remain lowercase depending on style guides.
Example: "hello world" → "Hello World"
Common uses: Book titles, article headlines, page titles, document headings, proper nouns, formal document titles.
Only the first letter of the sentence is capitalized. The rest of the sentence is lowercase. Proper nouns and acronyms retain their capitalization where appropriate.
Example: "HELLO WORLD" → "Hello world"
Common uses: Paragraphs in articles, regular sentences, email body text, social media posts, document content.
The first letter of each word is capitalized, similar to Title Case, but treats each word as an independent entity.
Example: "hello world example" → "Hello World Example"
Common uses: Class names in programming, database object names, headings, captions, product names, formal declarations.
UPPERCASE: Use for emphasis, acronyms (NASA, FBI), legal notices, urgent alerts, constant names in code, or when you need maximum visibility.
lowercase: Use for URLs, email addresses, code variables, hashtags, casual writing, or when you want a minimalist aesthetic.
Title Case: Use for book/movie titles, article headlines, formal headings, document titles, and when you need professional appearance.
Sentence case: Use for regular prose, body text, emails, social media captions, and everyday communication where sentences flow naturally.
Capitalized Case: Use for programming identifiers, formal declarations, product/brand names, and technical documentation.
AP Style: Uses Sentence case for most headlines with some exceptions.
Chicago Manual of Style: Uses Title Case with specific rules for small words and prepositions.
APA Style: Uses Sentence case for most titles with only proper nouns capitalized.
MLA Style: Uses Title Case for works with specific guidelines for capitalizing small words.
camelCase: First word lowercase, subsequent words capitalized (myVariableName). Common in JavaScript, Java, Python.
PascalCase: All words capitalized (MyClassName). Used for class names and constructors.
snake_case: Words separated by underscores, all lowercase (my_variable_name). Common in Python, databases.
CONSTANT_CASE: All uppercase with underscores (MAX_VALUE). Used for constants and global variables.
kebab-case: Words separated by hyphens, all lowercase (my-component-name). Used in HTML classes and URLs.