Blog posts and videos
Headlines and video titles look consistent when every one follows the same style.
13 case formats in one text box. Paste, click, copy.
Turn plain words into tiny, raised, mirrored and symbol text you can paste anywhere.
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Paste a title or a whole list. Every word gets a reason, you can click any word to override it, and a panel shows where the styles disagree.
Last updated: November 6, 2026
Your titles run through AP, APA 7, Chicago 18 and MLA 9. Only the words they treat differently are listed.
| Word | Result | Reason |
|---|
Private by design. Your titles are converted in your browser and are never uploaded. Protected terms are saved only in this browser, with no account.
Title case capitalizes the first letter of the important words in a title and keeps small words lowercase. “The Lord of the Rings” is title case: Lord and Rings are capitalized, while of and the stay lowercase in the middle.
Which small words stay lowercase depends on the style guide. AP, APA, Chicago and MLA agree on the first and last word and on articles, but they differ on prepositions and a few conjunctions. This converter applies the guide you choose and tells you the reason for every word.
Need the other format? Use the sentence case converter to capitalize only the first word, or the case converter for developer formats such as camelCase.
| You paste | You get |
|---|---|
| the lord of the rings: the return of the king | The Lord of the Rings: The Return of the King |
| how to build a habit that lasts | How to Build a Habit That Lasts |
| a guide to writing between the lines | A Guide to Writing Between the Lines |
| WHAT EVERY EDITOR SHOULD KNOW ABOUT HEADLINES | What Every Editor Should Know About Headlines |
| out-of-the-box thinking for self-taught designers | Out-of-the-Box Thinking for Self-Taught Designers |
It takes four steps and works for one title or a list of hundreds.
Pick AP, APA 7, Chicago 18, MLA 9 or General. The line under the buttons states the rule in one sentence.
Type one title, or paste a list with one title per line. ALL CAPS and lowercase titles both work.
Hover or tap a word to see why it was capitalized or not. Click it to flip it, and the result updates.
Copy the result or download it as a .txt file. Each title stays on its own line.
This is what the converter applies for each style. The rows where the columns differ are where your result changes.
| Word type | AP | APA 7 | Chicago 18 | MLA 9 |
|---|---|---|---|---|
| Articles: a, an, the | Lowercase | Lowercase | Lowercase | Lowercase |
| and, but, for, or, nor | Lowercase | Lowercase | Lowercase | Lowercase |
| so, yet | Lowercase | Lowercase | Capitalized | Lowercase |
| if | Lowercase | Lowercase | Capitalized | Capitalized |
| as | Lowercase | Lowercase | Lowercase | Lowercase |
| Prepositions of 1 to 3 letters (at, by, in, of, on, to, up) | Lowercase | Lowercase | Lowercase | Lowercase |
| Prepositions of 4 letters (from, with, into, over) | Capitalized | Capitalized | Lowercase | Lowercase |
| Prepositions of 5+ letters (between, through, against) | Capitalized | Capitalized | Capitalized | Lowercase |
| Other words of 4+ letters (that, when, because) | Capitalized | Capitalized | Capitalized | Capitalized |
| First and last word | Capitalized | Capitalized | Capitalized | Capitalized |
| First word after a colon | Capitalized | Capitalized | Capitalized | Capitalized |
The same titles in four styles. The highlighted words are the ones that change. The tool above builds this comparison for your own text.
| Title | AP | APA 7 | Chicago 18 | MLA 9 |
|---|---|---|---|---|
| the gap between theory and practice | The Gap Between Theory and Practice | The Gap Between Theory and Practice | The Gap Between Theory and Practice | The Gap between Theory and Practice |
| a guide from start to finish | A Guide From Start to Finish | A Guide From Start to Finish | A Guide from Start to Finish | A Guide from Start to Finish |
| a room with a view | A Room With a View | A Room With a View | A Room with a View | A Room with a View |
| what to do after the storm | What to Do After the Storm | What to Do After the Storm | What to Do After the Storm | What to Do after the Storm |
| so what do we do if it rains | So What Do We Do if It Rains | So What Do We Do if It Rains | So What Do We Do If It Rains | So What Do We Do If It Rains |
It saves the most time on long lists and on titles that must follow a style guide.
Headlines and video titles look consistent when every one follows the same style.
Check APA headings, MLA works-cited titles and Chicago notes against the rules of your guide.
Titles of works are normally written in title case, so one rule keeps a whole list uniform.
Short titles and subject lines read cleaner when the small words are lowercase.
Paste a column of names from a spreadsheet and copy back one title per line.
Turn a shouting title into a readable one, then fix any names with protected terms.
Title case depends on grammar and on names. These limits explain the few words you may need to flip by hand.
Up, off, out and down are prepositions in some titles and adverbs in others (Log In, Set Up). Chicago capitalizes the adverb. The tool cannot read grammar, so click the word to flip it.
To stays lowercase in every style here, including in infinitives. Click it if your editor wants a capital.
A name like Ludwig van Beethoven or a brand like eBay depends on the owner. Add it to protected terms and it keeps exactly the form you typed.
The first word after a colon, a dash or the end of a sentence is always capitalized, as the style guides require.
APA and Chicago publish their rules online. The AP Stylebook and MLA Handbook are paywalled, so those two styles follow their widely reported rules, cross-checked in several sources. Confirm against your edition when it matters.
Title case is a rule, not an editor. Skim the highlighted words before you publish.
Your office apps have a title case button, but none of them asks which style guide you follow.
Change case, Capitalize Each Word, capitalizes the first letter of every word, including a, of and the. It cannot follow a style guide. See the Microsoft guide.
Format, Text, Capitalization, Title Case applies one fixed rule and has no choice of style guide. Paste the title here when you need AP, APA, Chicago or MLA.
The formula =PROPER(A1) capitalizes every word and also capitalizes the letter after an apostrophe, so it turns don’t into Don’T. Paste the column here instead.
The rules on this page follow the published guidance below. Last reviewed: November 6, 2026. The converter is rule-based, so treat it as a fast first pass, not a replacement for an editor or your own style guide.
Need a different format? These tools work the same way: open, paste, copy.
Short answers to what people ask most about title case.
A title case converter capitalizes the important words in a title and keeps small words such as a, the, and and of in lowercase. This one follows AP, APA, Chicago or MLA rules, lets you override any word, and runs in your browser with no sign-up.
Pick a style, then paste your title into the box. The result appears instantly. Click Copy result or download it as a .txt file. For many titles at once, put one title on each line.
Articles (a, an, the), coordinating conjunctions such as and, but and or, and short prepositions such as at, by, in, of and on are lowercase in the middle of a title in all four styles. The first and last words are always capitalized.
They differ mainly on prepositions and a few conjunctions. AP and APA capitalize any word of four letters or more. Chicago 18 capitalizes prepositions of five letters or more. MLA lowercases every preposition. The Where the styles disagree panel shows this for your own text.
It depends on the style. AP and APA capitalize from because it has four letters. Chicago 18 and MLA lowercase it because it is a short preposition. The converter shows both results side by side.
Since the 18th edition, Chicago capitalizes prepositions of more than four letters, such as between and through, and lowercases shorter ones. Earlier editions lowercased every preposition. Chicago also capitalizes a preposition that is used as an adverb or adjective.
Yes. Click any word in the result to flip its capital letter, and the tool remembers the choice while you edit. Use Undo my word edits to go back. Hover a word to read the reason for the automatic result.
Put one title on each line. Every line is converted on its own, so the first and last word rules apply to each title. The copied result keeps one title per line.
The tool keeps a built-in list of common acronyms and names, words with inner capitals such as iPhone, and lone ALL-CAPS acronyms in mixed-case text. Add anything else to Protected terms. The list is saved in your browser only.
No. The conversion runs in your browser, so your titles are not sent to a server. Only your protected terms and chosen style are saved, and they stay in this browser. There is no account and no character limit.