Text & Writing Tools

Case Converter

Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case and more in one click.

Paste your text, pick a case, and copy the result - each line is converted separately unless you choose otherwise.

Text to convert

Apply to

Result

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Title Case follows common headline rules, so short words such as "and" and "of" stay lowercase - check names and brands by eye.

What Is the Case Converter?

It changes the capitalisation of text in one click. Besides the everyday cases - UPPERCASE, lowercase, Title Case and Sentence case - it produces the naming styles programmers use: camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE and dot.case.

Common Uses

Fixing text that was typed with Caps Lock on.
Formatting headlines and headings consistently.
Turning a phrase such as "user profile image url" into a variable name, a CSS class or a database column.

How to Use It

Paste your text.
Click the case you want - the result appears below.
Choose whether to convert each line separately (useful for lists of names or headings) or the whole text at once.
Copy the result.

Example

With Title Case, the lord of the rings: the return of the king becomes The Lord of the Rings: The Return of the King. Short words such as of and the stay lowercase in the middle of the title, but the first word after the colon is capitalised because it starts a subtitle. The second line, user profile image url, becomes userProfileImageUrl in camelCase, user_profile_image_url in snake_case and USER_PROFILE_IMAGE_URL in CONSTANT_CASE.

How the Programming Cases Work

The tool first splits the text into words - at spaces, punctuation, underscores, hyphens and at the change from a lowercase to an uppercase letter - so you can convert between the styles too: userProfileImageURL gives user_profile_image_url in snake_case.

Limitations

Title Case follows common headline rules, but style guides disagree on details such as whether to capitalise with or from, and the tool cannot know that a word is a name or a brand that keeps its own capitals, such as iPhone or McDonald. Read the result before you publish. To turn a title into a URL, use the Slug Generator.

Frequently Asked Questions

Title Case capitalises the main words of a heading, as in "The Return of the King". Sentence case capitalises only the first word and names, as in "The return of the king", and is the style many websites now use for headings.

Short articles, conjunctions and prepositions such as a, an, the, and, but, or, of, in, on, at, to and for stay lowercase unless they are the first or last word or start a subtitle after a colon.

camelCase is common for variables in JavaScript and Java, snake_case in Python, Ruby and database columns, kebab-case in URLs and CSS class names, and CONSTANT_CASE for constants and environment variables.

Yes. By default each line is converted separately, which suits lists of headings or variable names. Choose "The whole text at once" to treat everything as one block.