Case Converter

Free online case converter

A case converter changes the capitalization of text without retyping it. Paste your text, choose a style and copy the result. It handles everyday writing styles such as UPPERCASE, lowercase, Title Case and Sentence case, and the naming styles programmers use, such as camelCase, snake_case and kebab-case.

It is handy when text arrives in the wrong format: a headline typed in capitals, a pasted paragraph with random capitals, or a list of labels that must become variable names.

How to use it

1. Paste or type your text into the first box.
2. Click the style you want. The result updates instantly in the second box.
3. Click Copy and paste it where you need it.
4. Switch styles as often as you like. Your original text is never changed.

The styles explained

• UPPERCASE and lowercase change every letter.
• Title Case capitalizes the main words of a headline and leaves small words like "of" and "the" lowercase.
• Sentence case capitalizes the first letter of each sentence and the pronoun I.
• Capitalize Each Word capitalizes every word, including small ones.
• camelCase and PascalCase join words without spaces for variables and classes.
• snake_case, kebab-case and CONSTANT_CASE join words with underscores or hyphens for file names, URLs and constants.
• aLtErNaTiNg swaps small and capital letters for a playful look.

Common uses

• Writers and editors fix headlines and subheadings.
• Students repair text typed with Caps Lock on.
• Developers rename variables, columns and constants.
• Marketers format titles, buttons and email subject lines.

Frequently asked questions

What is the difference between Title Case and Capitalize Each Word?

Title Case follows common headline style: it capitalizes the important words but keeps short words such as "a", "the", "of" and "and" in lowercase unless they come first or last. Capitalize Each Word simply capitalizes every word.

What is the difference between camelCase and PascalCase?

Both join words without spaces and capitalize each new word. camelCase starts with a lowercase letter (myVariableName), while PascalCase starts with a capital (MyVariableName). Programmers use them for variables and for class names.

Does the converter keep my line breaks and punctuation?

Yes for UPPERCASE, lowercase, Title Case, Sentence case, Capitalize Each Word and aLtErNaTiNg. The programming cases (camel, Pascal, snake, kebab and CONSTANT) convert each line separately and drop punctuation, because identifiers cannot contain it.

Which style guide does Title Case follow?

It uses a simple, widely used rule set: short articles, conjunctions and prepositions stay lowercase unless they are the first or last word. Style guides such as AP, APA and Chicago differ on edge cases, so check your own guide for important headings.

Privacy

Everything runs locally in your browser. Your text is never uploaded, stored or shared.

Related tools: Capitalization Fixer · Slug Generator · Remove Line Breaks · Word Counter