Case Converter

What is a case converter for?

A case converter changes the capitalization of text without changing the words themselves. Paste in a sentence, a heading, or a whole paragraph and switch it to UPPERCASE, lowercase, Sentence case, or Title Case in one click. It's handy for cleaning up text pasted from somewhere with the wrong capitalization, fixing a heading someone typed in all caps, or getting an article title formatted correctly before it goes into a CMS, a resume, or a slide deck.

UPPERCASE and lowercase are the simple ones: every letter goes one way or the other. Sentence case capitalizes only the first letter of each sentence (it looks for a period, exclamation point, or question mark to know where one sentence ends and the next begins) and lowercases everything else, which is the correct capitalization for regular prose. Capitalize Each Word puts an uppercase letter at the start of every word, which is useful for things like proper nouns or button labels but isn't the same as a properly formatted title.

What is Title Case, and why do APA, Chicago, AP, and MLA differ?

Title case is the capitalization style used for headings, article titles, and book titles: major words are capitalized and minor words (articles like "a" and "the", coordinating conjunctions like "and" or "but", and prepositions) are left lowercase in the middle of the title, while the first and last word are always capitalized no matter what they are. The tricky part is that different style guides draw the line between "major" and "minor" differently, which is why the same title can look correct in one style and wrong in another.

APA and AP style capitalize any word of four letters or more, even prepositions like "With", "From", or "Between", and only lowercase short articles, conjunctions, and prepositions of three letters or fewer. Chicago and MLA style take a different approach: they lowercase prepositions in the middle of a title no matter how long they are, while still capitalizing subordinating conjunctions like "Because" or "Although". The general Title Case option is a sensible middle ground that lowercases common articles, short conjunctions, and common prepositions in the middle of a title, which covers most everyday writing that doesn't need to follow a specific style guide.

To capitalize a title correctly, paste your text into the box above and click the Title Case button for the style you need, then copy the result. Everything runs in your browser, so your text is never uploaded or sent anywhere.