Text Case Converter — Free Online Tool

🔠 Text Case Converter

Reformatting text case by hand — retyping a heading in Title Case, or converting a phrase into camelCase for a variable name — is tedious and easy to get inconsistent. This tool converts any text into UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case or kebab-case with one click.

It's useful for writers cleaning up headings, developers converting labels into valid variable or file names, and anyone standardizing text formatting quickly.

How to use the Text Case Converter

Paste or type your text into the box.
Click the case format you want — UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case or kebab-case.
Copy the converted result with one click.

How each case format works

UPPERCASE / lowercase: every letter is converted to upper or lower case. Title Case: the first letter of each word is capitalized. Sentence case: only the first letter of the whole text (and after sentence-ending punctuation) is capitalized. camelCase: words are joined with no spaces, the first word lowercase and every following word capitalized. snake_case and kebab-case: words are lowercased and joined with underscores or hyphens respectively — common conventions for variable names, file names and URL slugs.

Frequently asked questions

What's camelCase used for?

camelCase is a common naming convention in programming languages like JavaScript and Java for variables and function names, e.g. firstName or calculateTotal — it avoids spaces (which aren't valid in identifiers) while keeping words readable.

What's the difference between snake_case and kebab-case?

Both lowercase every word and remove spaces, but snake_case joins words with underscores (my_variable_name) — common in Python and database column names — while kebab-case joins words with hyphens (my-variable-name) — common in URLs and CSS class names.

Does Sentence case affect capitalization mid-sentence?

Sentence case capitalizes the first letter after the start of the text and after sentence-ending punctuation (. ! ?), and lowercases the rest, mimicking standard sentence capitalization rather than capitalizing every proper noun individually.