Text Case Converter
Convert text to uppercase, lowercase, title case and more
How to use Text Case Converter
Convert text to uppercase, lowercase, title case, sentence case and more. Fast online text case converter. Free, no signup needed.
What is a text case converter used for?
Text case conversion is a frequent need in writing, programming, and data processing. The wrong case can break code, look unprofessional in documents, or fail database queries that are case-sensitive.
- Title case for headings: Convert "the best tools for developers" to "The Best Tools for Developers" instantly for blog posts, articles and page titles.
- Uppercase for constants: Developers use ALL_CAPS for constants in most languages:
MAX_RETRY_COUNT,API_BASE_URL. - Lowercase for URLs and slugs: URLs must be lowercase. "My Blog Post" becomes "my blog post" before slug generation.
- Sentence case for copy editing: Fix text that was accidentally typed in all caps — "IMPORTANT ANNOUNCEMENT" becomes "Important announcement".
- Normalizing data: When importing data from multiple sources, standardize casing before storing in a database to avoid duplicates like "Barcelona", "BARCELONA" and "barcelona".
camelCase and snake_case: Developers often need to convert between naming conventions. "user full name" becomes userFullName (camelCase) or user_full_name (snake_case) depending on the language convention.
Frequently Asked Questions
What is the difference between title case and sentence case?
Title case capitalizes the first letter of each major word: 'The Quick Brown Fox'. Sentence case only capitalizes the first word and proper nouns: 'The quick brown fox'. Title case is used for headings; sentence case for body text and captions.
Does case conversion work with accented characters?
Yes — modern case conversion handles accented characters correctly: 'café' becomes 'CAFÉ' in uppercase, and 'MÜNCHEN' becomes 'münchen' in lowercase. This tool uses the browser's built-in Unicode case mapping.
What is camelCase?
CamelCase joins words without spaces and capitalizes each word after the first: 'getUserName'. It is the standard naming convention in JavaScript, Java, and Swift. PascalCase capitalizes every word including the first: 'GetUserName' — used for class names.
What is snake_case?
Snake_case uses underscores between words, all lowercase: 'get_user_name'. It is the convention in Python, Ruby, and SQL. Screaming snake case is all uppercase: 'MAX_CONNECTIONS' — used for constants.
Can I convert a large block of text at once?
Yes — paste any amount of text and the conversion applies to every character. There is no limit on input size. The conversion happens instantly in your browser with no data sent to any server.
Text case converter vs find & replace vs code editor
A dedicated case converter like this one handles the full text in one click — ideal for quick transformations without opening a code editor. Find & replace with regex can do case conversion but requires knowing the regex syntax. Code editors (VS Code, Sublime) have built-in case commands but require the file to be open. Word processors (Word, Google Docs) offer basic title/upper/lower case but not snake_case or camelCase. For quick, browser-based conversion with no setup, this tool is the fastest option.