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Tools / Title capitalization tool

Title capitalization tool

Format blog titles, book headings, and academic papers with exact editorial capitalization rules. Automatically handles prepositions, articles, coordinating conjunctions, and subtitle colons across major style guides.

Runs entirely in your browser

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About this tool

Different style guides capitalise titles differently, and getting it right by hand is fiddly. This tool applies the exact rules of Chicago, AP, APA and MLA styles to a headline or title, handling the awkward cases — which prepositions, articles and coordinating conjunctions stay lowercase, and how to treat the word after a subtitle colon.

Those edge cases are where manual title casing goes wrong: styles disagree on short words and on length thresholds for prepositions, so a title that is correct in one guide is wrong in another. Choosing the style and letting the tool apply its rules gives a consistent, correct result every time.

It runs in your browser, so nothing is uploaded. Use it for blog titles, book and chapter headings, and academic papers, where matching a specific style guide matters for professionalism and consistency.

Frequently asked questions

Which style guides does it support?
Chicago, AP, APA and MLA, each with its own rules for which words are capitalised in a title.
How do the styles differ?
They disagree on how to treat short words like prepositions, articles and conjunctions, and on length thresholds, so the same title can be capitalised differently in each. The tool applies the correct rule for the style you pick.
Does it handle subtitles after a colon?
Yes. It capitalises the first word after a subtitle colon as the chosen style requires, one of the details that is easy to get wrong by hand.
Is my text uploaded?
No. Capitalisation runs in your browser, so your titles are not sent anywhere.
What is it useful for?
Blog and article titles, book and chapter headings, and academic papers — anywhere a consistent, style-correct title matters.

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