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Convert text to uppercase, lowercase, title case, sentence case, and more formatting options instantly. Fast, free, and easy to use.
Our free online text case converter provides instant conversion between multiple text formatting styles. Perfect for writers, programmers, content creators, and anyone who needs to quickly change text capitalization or formatting. No installation required, works directly in your browser with unlimited conversions.
Convert to uppercase, lowercase, title case, sentence case, camelCase, snake_case, kebab-case, and more formatting styles.
Real-time conversion with one click. See results immediately without any processing delay.
Track character count, word count, sentence count, and line count as you type.
Copy to clipboard with one click or download your converted text as a TXT file.
Converts all letters to capital letters. Useful for headings, emphasis, or creating attention-grabbing text.
hello world β HELLO WORLD
Converts all letters to small letters. Useful for normalizing text or creating uniform formatting.
Hello WORLD β hello world
Capitalizes the first letter of each major word. Perfect for titles, headings, and proper formatting of names.
the quick brown fox β The Quick Brown Fox
Capitalizes only the first letter of each sentence. Standard formatting for paragraphs and regular text.
hello world. this is a test. β Hello world. This is a test.
Capitalizes the first letter of every single word, including articles and prepositions.
the cat in the hat β The Cat In The Hat
Removes spaces and capitalizes the first letter of each word except the first. Common in programming for variable names.
hello world test β helloWorldTest
Replaces spaces with underscores and converts to lowercase. Popular in Python and database naming conventions.
Hello World Test β hello_world_test
Replaces spaces with hyphens and converts to lowercase. Used in URLs, CSS class names, and file names.
Hello World Test β hello-world-test
Converts to uppercase with underscores replacing spaces. Used for constants in programming.
max buffer size β MAX_BUFFER_SIZE
Alternates between lowercase and uppercase for each letter. Creates a playful or sarcastic effect.
hello world β hElLo wOrLd
Swaps the case of each letter - uppercase becomes lowercase and vice versa.
Hello WORLD β hELLO world
Content Writing: Format headings and titles consistently across documents, convert copy-pasted text to proper case, or create emphasis with uppercase text.
Programming: Convert variable names to camelCase, function names to snake_case, constants to CONSTANT_CASE, or CSS classes to kebab-case following coding conventions.
SEO & Marketing: Format meta titles and descriptions, create URL slugs in kebab-case, or standardize product names and descriptions.
Email & Communication: Fix accidentally sent messages in all caps, format professional email subject lines, or correct awkward capitalization in text.
Data Cleaning: Normalize inconsistent data entries, standardize database records, or prepare text for import into other systems.
Academic Writing: Format paper titles, section headings, citations, or ensure consistent capitalization throughout documents.
camelCase: Used in JavaScript, Java, and TypeScript for variable and function names. First word lowercase, subsequent words capitalized.
snake_case: Popular in Python, Ruby, and PHP for variables, functions, and file names. All lowercase with underscores separating words.
kebab-case: Standard for URLs, HTML IDs, CSS class names, and file names. Lowercase with hyphens between words.
CONSTANT_CASE: Universal convention for constants across most programming languages. Uppercase with underscores.
PascalCase: Used for class names in most object-oriented languages. Every word starts with a capital letter, no separators.
Yes, absolutely! Our tool is 100% free with no hidden costs, registration requirements, or limitations. Convert unlimited text.
No, there are no character limits. You can convert text of any length, from a single word to entire documents.
Yes! After the page loads, all conversions happen in your browser using JavaScript. No internet connection is required for conversion.
No, your text is processed entirely in your browser and never sent to our servers. Your privacy is completely protected.
Title Case follows proper capitalization rules (doesn't capitalize articles like "the", "a", "an" in the middle of titles), while Capitalize Each Word capitalizes every single word without exception.
Yes! The tool preserves line breaks and paragraph structure. Sentence case will properly capitalize the first word of each sentence across all paragraphs.
The tool works with plain text only. If you paste formatted text, it will be converted to plain text with only the case changes applied.