Case Converter
Convert text to UPPERCASE, lowercase, Title Case, or Sentence case.
About this tool
Refactoring variable names, formatting headings, or normalizing data — text case conversion is a daily task for developers, writers, and data analysts. The Case Converter handles all common case conventions in one click.
How the Case Converter works
The Case Converter transforms text between common case styles: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, and kebab-case. It handles special characters, numbers, and multi-word inputs correctly for each convention.
How to use this tool
- Paste or type your text into the text area.
- Select the target case format from the dropdown.
- Click 'Convert' and copy the transformed text.
Common use cases
Converting variable names between programming conventions
Formatting headlines in Title Case for an article
Normalizing user-entered data to a consistent case format
Preparing URL slugs in kebab-case from article titles
Examples
- Input: 'hello world' → camelCase: 'helloWorld', PascalCase: 'HelloWorld', snake_case: 'hello_world', kebab-case: 'hello-world'.
- Input: 'the quick brown fox' → Title Case: 'The Quick Brown Fox', Sentence case: 'The quick brown fox', UPPERCASE: 'THE QUICK BROWN FOX'.
Tips & best practices
- camelCase: first word lowercased, subsequent words capitalized — used in JavaScript, TypeScript, Java (methods).
- PascalCase: all words capitalized including the first — used in C#, Java (classes), and React component names.
- snake_case: all lowercased with underscores — used in Python, Ruby, Rust, and database column names.
- kebab-case: all lowercased with hyphens — used in CSS class names, URLs, and HTML attributes.
Common mistakes to avoid
❌ Expecting Title Case to follow AP or Chicago style rules — the converter capitalizes every word. For style-guide-compliant titles, manually lowercase articles and short prepositions.
❌ Using kebab-case in programming languages — hyphens are subtraction operators and cannot be used in identifier names.
Frequently Asked Questions
Can I convert large paragraphs at once?
Yes. Paste full paragraphs or multi-paragraph text and convert the entire block to the selected case format.
Does title case follow AP or Chicago style?
It applies standard capitalization — first letter of each word. It does not apply language-specific style rules such as lowercasing prepositions or articles.
Related tools
Related guides
In-depth articles to help you learn more about this topic.
Continue Learning
Explore our in-depth guides, browse related tools, or return to the full collection.