Case Converter Online Free
Convert any text to uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case, CONSTANT_CASE, and more with one click. Runs entirely in your browser.
Why Use a Case Converter Online Free
Manually reformatting variable names, headings, or copy between different case styles is tedious and mistake-prone. Switching a function name from camelCase to snake_case across a large codebase or converting a title from sentence case to title case in a document should take one second, not minutes.
This case converter online free handles ten case formats instantly. It auto-detects word boundaries from spaces, underscores, hyphens, and camelCase transitions, so it works on natural text and code identifiers alike.
What this tool does
All 10 case formats explained
How to convert text case
Paste your text
Type or paste any text or identifier into the input on the left.
Click a format
Click any of the 10 case format buttons. Conversion happens instantly.
Read the output
Your converted text appears in the output pane on the right.
Copy or chain
Copy the result or click Use as input to convert it further.
FAQ: Case Converter Online Free
Yes, completely free. No account, no signup, and no payment required.
Yes. The converter detects word boundaries in camelCase, PascalCase, snake_case, and kebab-case input automatically. Paste a variable name like getUserProfileData and convert it to get_user_profile_data or GET_USER_PROFILE_DATA instantly.
Both join words without separators and capitalise each word. camelCase keeps the very first word entirely lowercase, so you get helloWorld. PascalCase capitalises the first letter of every word including the first, so you get HelloWorld. PascalCase is standard for class names while camelCase is common for variable and function names.
CONSTANT_CASE is uppercase snake_case and is the standard for named constants in most programming languages. Examples include MAX_RETRY_COUNT, DATABASE_URL, and API_KEY. Many linters enforce this style for values that never change.
Sentence case capitalises only the first word of each sentence, like standard prose. Title case capitalises the first letter of every word. Titles and headings use title case while body copy uses sentence case.
Yes. Click Use as input to move the converted output back into the input field, then apply another case format. This lets you convert between formats in multiple steps.