How to Convert Text Case Online
The text case converter online lets you change the capitalization style of any text instantly. Whether you need to convert a heading to title case, transform a variable name to snake_case, or fix an ALL-CAPS document, paste your text and click the format you need.
Text Case Formats Explained
- UPPERCASE: All letters capitalized. Used for emphasis, constants, and abbreviations.
- lowercase: All letters in lower case. Used for URLs, email addresses, and some code styles.
- Title Case: First letter of each word capitalized. Standard for headings, book titles, and page titles.
- Sentence case: Only the first letter of the first word is capitalized (plus after . ! ?). Standard for paragraph text and UI labels.
- camelCase: No spaces, first word lowercase, subsequent words capitalized. Standard in JavaScript, Java, and Swift for variable names.
- PascalCase: Like camelCase but every word starts with a capital. Used for class names in most programming languages.
- snake_case: Words separated by underscores, all lowercase. Standard in Python, Ruby, and database column names.
- kebab-case: Words separated by hyphens, all lowercase. Used in CSS class names, HTML attributes, and URL slugs.
- CONSTANT_CASE: All uppercase with underscores. Used for constants and environment variables (e.g., API_BASE_URL).
Who Uses a Text Case Converter?
Developers use it to rename variables between coding conventions when refactoring or switching languages. Content writers and editors use it to fix inconsistent capitalization in headings or bulk-correct text pasted from external sources. SEO specialists use it to format title tags and meta descriptions correctly. Data analysts use it to standardize column names or category labels before importing data.
Case Conversion vs Manual Editing
Manually converting a block of 50 variable names from camelCase to snake_case takes minutes and introduces typos. This tool does it in under a second, handling edge cases like consecutive uppercase letters, numbers, and special characters consistently.
Frequently Asked Questions
What is the difference between camelCase and PascalCase? +
Both join words without spaces. camelCase starts with a lowercase letter (helloWorld), while PascalCase capitalizes every word including the first (HelloWorld). PascalCase is common for class names; camelCase is common for variable and function names.
Does this tool work for non-English characters? +
It works best with standard ASCII Latin characters. Accented characters (é, ü, ñ) are preserved but their case conversion depends on JavaScript's built-in locale support, which varies by browser.
Can I convert multiple lines at once? +
Yes. Paste as many lines as you need — the conversion applies to the entire input including newlines. Each line is converted independently for sentence case.
When should I use kebab-case vs snake_case? +
Use kebab-case for HTML/CSS (class names, IDs, URL slugs) and snake_case for code (Python variables, database columns, file names in Unix systems). Both are valid choices in many contexts — the key is to be consistent within a project.
Is this text case converter free? +
Yes, completely free with no limits. No sign-up required.