Case Converter
Type or paste text once and get it in fourteen cases at the same time. Click any row to copy it.
Which case should I use?
Sentence case capitalises only the first word of each sentence (and “I”). It is the house style for most UI text, headings at Google and GOV.UK, and email subject lines. Title Case capitalises the main words and keeps short words like “of”, “and” and “the” lower case unless they start or end the title — close to AP style. Capitalize Words simply capitalises every word.
The programming cases split your text into words first, including existing camelCase boundaries, so “userID count” becomes userIdCount, user_id_count or USER_ID_COUNT. Each line is converted separately, so you can paste a list of names and convert them all at once.
Questions
What is the difference between camelCase and PascalCase?
Both join words with no separator. camelCase starts with a lower-case letter (firstName), which is typical for variables in JavaScript and Java. PascalCase capitalises the first word too (FirstName), common for class and component names.
When is CONSTANT_CASE used?
For constants and environment variables, such as MAX_RETRIES or DATABASE_URL. It is also called SCREAMING_SNAKE_CASE.
Why doesn’t Title Case capitalise every word?
Most style guides keep articles, short conjunctions and short prepositions lower case in titles (“The Lord of the Rings”). If you want every word capitalised, use the Capitalize Words row instead.
Does it keep acronyms like NASA or brand names like iPhone?
With “Keep acronyms in Title case” ticked, words already written in capitals (NASA, HTML) or with internal capitals (iPhone, eBay) are left alone in Title Case. Other rows follow their rule strictly.
Is my text stored?
Only in this browser’s local storage, so it survives a refresh. Nothing is sent to a server.