Convert text between different letter cases: UPPERCASE, lowercase, Title Case, Sentence case, Capitalized Case, Alternating Case, and Inverse Case.
Sentence Counter
Sentence Counter
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.
Letters alternate between lowercase and uppercase, starting with lowercase on the first character. Non-letter characters are skipped in the alternation pattern.
Example: "hello world" → "hElLo WoRlD"
Common uses: Social media mockery, sarcastic tone (often called "Mocking SpongeBob" case), fun/playful content, memes, creative typography.
Every letter has its case flipped — uppercase letters become lowercase and lowercase letters become uppercase. Numbers and symbols are unchanged.
Example: "Hello World" → "hELLO wORLD"
Common uses: Stylistic emphasis, creative writing, game usernames, fun text effects, making existing text stand out in an unexpected way.
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.
Alternating Case: Use for humorous or sarcastic social media content, memes, or playful creative text.
Inverse Case: Use for stylistic emphasis, unique usernames, creative typography, or to flip the casing of any existing mixed-case text.
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.