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Chicago Style Title Case Converter

Capitalize headlines by real style-guide rules — AP, APA, Chicago and MLA — with correct handling of articles, prepositions, hyphens and colons.

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Splitting the title into words
Applying style-guide rules
Capitalizing hyphens and colons
Done

Result

This page opens the title capitalization tool with Chicago style preselected — paste your title, run it and copy the result, and compare it with the AP, APA and MLA versions rendered next to it.

The Chicago Manual of Style is the reference for book publishing and long-form editing. Chicago lowercases all prepositions regardless of length — "over", "between", "throughout" all stay down — along with articles and coordinating conjunctions, while capitalizing the first and last words, both parts of hyphenated compounds and the word following a colon.

That length-blind preposition rule is where Chicago visibly differs from AP and APA: "The Quick Brown Fox Jumps over the Lazy Dog" is correct Chicago. The tool applies it consistently, line by line, entirely in your browser.

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Your files and inputs never leave this device. Processing runs completely offline. 100% Secure.

Accepted Formats & Rules

  • AP, APA, Chicago and MLA title case with per-style preposition rules.
  • First and last words always capitalized; words after colons capitalized; both parts of hyphenated compounds handled.
  • Multi-line input: each line is treated as its own title.

Key Benefits

✓ Real style-guide rules, not naive capitalization: articles, conjunctions and prepositions are lowercased exactly as AP, APA, Chicago and MLA prescribe.
✓ All four styles rendered at once with your chosen style first — compare and pick before you publish.
✓ Runs entirely in your browser — headlines and drafts are never uploaded anywhere.

Use Cases

  • • Capitalize a news headline in AP style with short prepositions lowercased and 4+ letter words capitalized correctly.
  • • Format paper and chapter titles for APA, Chicago or MLA reference lists without memorizing each guide's preposition rules.
  • • Compare all four style guides side by side to see exactly which words each one lowercases before you publish.