Capitalized Case converter

A capital case converter, cap case converter, and proper case converter usually mean Capitalized Case (Start Case): This Is An Example Of Capitalized Case. Short prepositions get the same treatment as nouns.

That is not UPPER CASE (all capitals) and not Title Case (style-guide headlines). If you are writing a book title or a news headline, switch to the Title Case converter and pick AP, APA, Chicago, or MLA.

What Capitalized Case / proper case is

People search for several names for the same transform:

• Capitalized Case / Start Case — engineering name
• Proper case — common in offices and Excel talk
• Capital case / cap case — everyday shorthand

All of them mean: capitalize the first letter of every whitespace-separated word. Unlike Title Case, words such as of, and, and the also rise.

Example: the lord of the rings → The Lord Of The Rings (Capitalized Case) vs a Chicago-style Title Case that would usually keep of / the lowercase inside the title.

When to use Capitalized Case

Use this page for:

• People names and address lines after a messy paste
• Playlist titles, photo album names, and simple marketing labels
• Form labels and Start Case design systems that capitalize every word
• Spreadsheet columns where “proper case” is the house rule

Do not use it for AP/Chicago publication headlines — those need Title Case. Do not use it for paragraphs — use Sentence case. Do not confuse it with UPPER CASE.

Proper case in Word, Excel, and Google Docs

Excel: =PROPER(A1) is the classic proper-case formula. Fill down, paste values. It capitalizes after spaces and some punctuation; it does not know AP Title Case, and it can mangle brands (Iphone, Nasa) unless you fix them.

Word: Home → Change Case → Capitalize Each Word. Same Start Case idea; no style-guide small-word list.

Google Docs: Format → Text → Capitalization → Title case — despite the name, Docs’ “Title case” behaves like capitalize-each-word for many pastes, not AP/Chicago.

When you need Start Case with optional brand repair (iPhone, NASA), paste into this proper case converter, leave smart casing on, and paste back. For true style-guide titles, open Title Case instead.

How to use this converter

1. Paste names, labels, or a messy title into the editor.
2. Confirm Capitalized Case is selected; keep smart casing on for brands.
3. Copy the result. Jump to Sentence case or Title Case if the tone is wrong — the paste stays in this tab.

Compare modes in title case vs sentence case vs capitalized case. Remember PROPER / Capitalize Each Word is not style-guide Title Case — see AP vs APA vs Chicago vs MLA title case. Need every letter lower first? Use the lower case converter. Need a URL from the same string? Continue to Slugify.

Playful siblings: alternating case for aLtErNaTiNg caps and inverse case to flip existing capitalization — not for publication headlines.