Case Converter
Convert text case style to UPPERCASE, lowercase, Title Case, Sentence case, or program syntax tags (slug, snake, camelCase) client-side.
Converted text will appear here... Select a conversion format below.
How to Convert Text Case Online (Step-by-Step)
Transform plain text, headlines, and code identifiers across UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case:
Type or paste your content into the main text box. The tool counts characters, words, and sentences in real time.
Select your desired case button: UPPERCASE for bold emphasis, lowercase for normalization, Title Case for blog headlines, Sentence case for documents, or camelCase / snake_case for coding.
Your content transforms instantaneously without changing your paragraph structure or unselected punctuation.
Click 'Copy Text' to immediately paste your formatted copy into code editors, Word documents, email drafts, or CMS publishing fields.
Developer Naming Conventions: When to Use Which Case
Software engineering standards dictate strict naming conventions depending on the programming language and context. Mixing case styles causes syntax errors, API contract discrepancies, and linting failures:
- camelCase: Standard for JavaScript, TypeScript, Swift, and Java variable and function names (e.g.,
calculateMonthlyPayment). - snake_case: Standard for Python variables, functions, and relational database column names in PostgreSQL and MySQL (e.g.,
created_at_timestamp). - kebab-case / slug-case: Universal for CSS class names, HTML attributes, and REST API URL routes (e.g.,
/tools/case-converter). - SCREAMING_SNAKE_CASE: Reserved across all major languages for global constants, environment variables, and configuration flags (e.g.,
API_SECRET_KEY).
Convert any raw string or database dump into clean developer tokens in 1 click using the 'Developer Syntax' buttons above.
Mastering Typography & Programming Casing Standards
Consistent capitalization is fundamental for editorial quality, professional typography, and programming syntax. Whether you are standardizing headlines for a publication, converting database column identifiers, or generating clean URL slugs for search engine optimization, manually editing letter casing is tedious and prone to human error.
Our Case Converter runs 100% locally in your web browser. It transforms entire essays, scripts, or code blocks between 9 distinct standard and programming case conventions in milliseconds with zero server transmission.
Need to analyze word metrics or check reading durations for your transformed text? Use our Word Counter & Text Analyzer or format code markdown with our Markdown Editor.
Comprehensive Casing Format Reference
- Sentence case: Capitalizes the initial character of each sentence and lowers the rest, adhering to standard grammar rules.
- Title Case: Capitalizes the first letter of major words while leaving minor conjunctions and prepositions lowercase (ideal for blog titles and book headings).
- UPPERCASE: Converts every letter to capital form (commonly used for emphasis, legal disclaimers, and constants).
- lowercase: Normalizes every character to lower glyphs.
- camelCase: Concatenates words with lower initial letter and uppercase subsequent initials (standard in JavaScript/TypeScript variables).
- snake_case: Separates lowercase words with underscores (standard in Python variables and SQL column names).
- URL slug-case (kebab-case): Strips punctuation, lowers characters, and joins tokens with hyphens to build SEO-friendly web addresses.
Frequently Asked Questions (FAQ)
Will converting case erase my paragraph formatting or newlines?
No. Standard text conversions (Sentence case, UPPERCASE, lowercase, Title Case) preserve your existing line breaks, tabs, and paragraph structures intact.
How does the URL slug generator handle special characters?
The slug generator removes punctuation symbols (such as quotes, commas, brackets, exclamation marks), replaces whitespace sequences with hyphens, and normalizes letters to lowercase for clean, valid URLs.
Is my text stored anywhere when using this tool?
No. All string manipulations execute in local browser memory. No data is logged, transmitted, or saved.