Which case to use where
Each case has a job. A quick guide:
- Title Case: headlines, blog titles, YouTube titles and book names.
- Sentence case: body text, buttons, menus and most social posts.
- UPPERCASE: short labels and a word of emphasis. Whole sentences in caps read as shouting.
- camelCase and PascalCase: JavaScript variables and class names.
- snake_case and CONSTANT_CASE: Python, databases and settings.
- kebab-case: URLs, file names and CSS classes.
How Title Case works here
Headline style capitalizes the main words and keeps short words lowercase. This tool keeps articles (a, an, the), short conjunctions (and, but, or, nor, so, yet) and short prepositions (at, by, for, in, of, on, to, up, via) lowercase.
The first and last word are always capitalized, and so is the word after a colon. Words that already have a capital inside them, like iPhone or NASA, stay as you typed them. Style guides differ on prepositions with four or more letters, so check yours if you write for a publication.
Fixing text typed in caps
If you paste something typed with caps lock on, choose Sentence case or Title Case. The tool notices when there are no lowercase letters and starts from lowercase, so you won't end up with every word in capitals.
Sentence case can't know which words are names. After converting, scan for people, places and brands and capitalize them yourself.
Code cases from plain words
The code cases split your text into words at spaces, punctuation and existing capitals, so “user ID number”, “userIdNumber” and “user_id_number” all convert cleanly into each other. Apostrophes are dropped, so “don't” becomes “dont”.
Small details that trip people up
Hyphenated words get a capital on each part in Title Case, so “well-known tips” becomes “Well-Known Tips”. A lone “i” always becomes “I” in Sentence case.
Case changes can't fix spelling or spacing. If your text has double spaces or stray line breaks, clean those up first. And if you're writing a title for search results or YouTube, keep it under about 60 characters so it isn't cut off, whatever case you choose.
Frequently asked questions
What's the difference between Title Case and Sentence case?
Title Case capitalizes most words, like a headline. Sentence case capitalizes only the first word and names, like a normal sentence.
Should “with” and “from” be capitalized in a title?
It depends on the style guide. AP capitalizes words of four or more letters, so “With” and “From”. Chicago keeps all prepositions lowercase. This tool capitalizes them, matching AP.
What is aLtErNaTiNg case for?
It's mostly used for jokes and memes, to show a mocking tone. Use it sparingly, because it's hard to read and screen readers stumble over it.
Is camelCase the same as PascalCase?
Almost. camelCase starts with a lowercase letter (userName) and PascalCase starts with a capital (UserName).