Case Converter

UPPERCASE, lowercase, Sentence case, Title Case and more

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Title Case follows editorial rules and leaves short words like of, the and in lowercase unless they open the title. Capitalize Each Word has no exceptions.

Uppercase to lowercase converter

Paste the text and press lowercase. Every capital letter becomes its small form and everything else — numbers, punctuation, spacing, line breaks — stays exactly where it was, so a block of ALL CAPS text comes back the same shape, just quieter.

If the caps were a mistake, lowercase is usually not the result you want either: it leaves no capital at the start of a sentence. Sentence case is the better repair for text that was typed with caps lock on. It lowercases everything and then capitalises the first letter of the text and the first letter after each full stop, question mark or exclamation mark.

One thing neither can know is which words are names. "MEETING WITH SARAH IN LONDON" becomes "Meeting with sarah in london" in sentence case, because the converter has no way to tell a name from any other word. Skim the result for names and acronyms before you use it.

Title case converter

Title case capitalises the main words of a heading and leaves the small ones alone. This converter keeps 26 short words lowercase when they fall in the middle of a title — articles such as a, an and the; conjunctions such as and, but, or and nor; and short prepositions such as of, in, on, to, by, at, for, with, from, into and over. The first and last word are always capitalised, whatever they are, so "the lord of the rings" comes out as "The Lord of the Rings".

Two limits are worth knowing. The converter lowercases the text before it applies the rule, so an acronym such as NASA or an iPhone-style name will come out with only its first letter capitalised and needs fixing by hand. And style guides disagree about longer prepositions such as "between" and "through" — this tool capitalises them, which matches most of them, but check the guide you are writing for if it matters.

Camel case, Pascal case, snake case, kebab case and constant case

The developer cases all work the same way: the converter breaks the text into words, drops the punctuation, and joins the words back together with a different rule. "user profile picture" becomes userProfilePicture in camel case, UserProfilePicture in Pascal case, user_profile_picture in snake case, user-profile-picture in kebab case, and USER_PROFILE_PICTURE in constant case.

Because punctuation is dropped, an apostrophe splits a word: "user's name" becomes three words, not two. That is usually what you want for an identifier, but it is worth a glance if the result looks one word too long.

The alternating case generator is the odd one out — it swaps between small and capital letters character by character, which is useful for exactly one kind of joke and nothing else.

About the Case Converter

Convert text between uppercase, lowercase, sentence case, title case, capitalised words, alternating case, camelCase, snake_case and kebab-case.

Frequently asked questions

Paste the text and press lowercase. Every capital becomes a small letter and nothing else changes. If the text was typed with caps lock on, sentence case is usually the better fix, because it also restores the capital at the start of each sentence.

Title case follows style rules and leaves short words like of, the and in lowercase unless they start the title. Capitalised words uppercase the first letter of every word without exception.

Yes. camelCase, snake_case and kebab-case conversions are included, which is useful when renaming variables or building URL slugs.

Yes, completely. There is no account, no usage limit and no watermark.