AP Style uses title case while Wikipedia Style uses sentence case. The two serve different contexts and produce very different looking headlines.
AP Style title case capitalizes all major words while lowercasing articles, coordinating conjunctions, and all prepositions regardless of length. It is the standard of the Associated Press Stylebook.
AP Style is required by most American newspapers, digital news outlets, and press releases. Public relations professionals follow it because journalists expect it.
Open AP Style converterWikipedia Style uses sentence case for all article titles and section headings, capitalizing only the first word and any proper nouns. It is the editorial standard of the Wikimedia Foundation.
Wikipedia Style applies to all Wikipedia articles and other Wikimedia projects. It is also adopted by technical documentation projects and wikis that want a neutral, readable tone.
Open Wikipedia Style converterAP Style is required by most American newspapers, digital news outlets, and press releases. Public relations professionals follow it because journalists expect it.
All prepositions are lowercased, whether short or long. This is the key rule that distinguishes AP Style from Chicago Style.
Wikipedia Style applies to all Wikipedia articles and other Wikimedia projects. It is also adopted by technical documentation projects and wikis that want a neutral, readable tone.
Only the first word and proper nouns receive capital letters. Common nouns that would be capitalized in title case remain lowercase.
Choose AP Style for journalism, press releases, and professional publications.
Choose Wikipedia Style when contributing to Wikipedia or building documentation that follows encyclopedia conventions.
AP Style and Wikipedia Style are both widely recognized standards, but they belong to entirely different editorial traditions. Journalism uses title case, and encyclopedic writing uses sentence case.