Case Converter
Convert text to uppercase, lowercase, title case, and more
What is Case Converter?
Case Converter is a free online text transformation tool that lets you quickly change the letter casing of any text. It supports multiple conversion modes including UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and dot.case. This tool is essential for programmers who need to convert variable names between different naming conventions, writers who need to fix capitalization issues, and anyone working with text formatting. Simply paste your text, click the desired conversion button, and get your result instantly. The converter handles mixed-language text intelligently, processing English characters while preserving characters from languages like Korean, Chinese, and Japanese that do not have case distinctions. All conversions happen in real time directly in your browser with zero server interaction, ensuring your data stays completely private. Whether you are reformatting code identifiers, standardizing headings in a document, or converting text for data processing, Case Converter saves you the tedious work of manual text editing.
How to Use
- Enter the text you want to convert in the text area.
- Click the desired conversion button (UPPERCASE, lowercase, Title Case, etc.).
- Copy the converted result and use it.
Tips & Best Practices
- Use camelCase for JavaScript variables and function names, PascalCase for class names and React components.
- Use snake_case for Python variables and database column names, CONSTANT_CASE for constants and environment variables.
- Title Case is perfect for headings and titles in articles, presentations, and documents.
- Use kebab-case for CSS class names, URL slugs, and HTML attributes.
- When converting to Sentence case, review the result as proper nouns may need manual capitalization.
Use Cases
Programming
Convert variable names between camelCase, snake_case, PascalCase, and kebab-case when switching between programming languages.
Document Formatting
Standardize headings and titles to Title Case across reports, presentations, and web content.
Database Work
Convert column names to snake_case format commonly used in SQL databases.
Content Creation
Fix accidental caps lock text or standardize text casing across marketing materials and blog posts.
FAQ
What is camelCase?
camelCase starts the first word in lowercase and capitalizes the first letter of subsequent words. Example: helloWorld
What is the difference between snake_case and CONSTANT_CASE?
snake_case uses all lowercase letters while CONSTANT_CASE uses all uppercase letters. Both separate words with underscores (_).
What is case conversion?
Case conversion changes the letter casing of text to uppercase, lowercase, or specific naming conventions, commonly used in programming and document formatting.
Is my data collected?
No, all conversions happen in your browser and no text is sent to any server.
What rules does Title Case follow?
Title Case capitalizes the first letter of each word and lowercases the rest. It is commonly used for English titles and headings.
Does it work with Korean text?
Korean has no uppercase/lowercase distinction, so Korean characters remain unchanged. In mixed text, only the English portions are converted.
Can I convert text from a file?
Yes, copy the text from your file, paste it into the input area, select the desired conversion, and copy the result back.
What is kebab-case used for?
kebab-case (words separated by hyphens, all lowercase) is widely used for CSS class names, URL slugs, and file names in web development.