Wikipedia Title Capitalization
Wikipedia uses sentence case for article titles: only the first word and proper nouns are capitalised. All other words remain lowercase.
Word-by-word explanation
Wikipedia capitalization rules
- Sentence case: only first word capitalised
- Proper nouns always capitalised
- Acronyms preserved as-is
- Word after colon capitalised
- All other words lowercase
Read the full Wikipedia title capitalization rules with examples.
When to Use Wikipedia Title Capitalization
Wikipedia title case is the standard for Wikipedia, Online Encyclopedias, Reference Works writing. Wikipedia uses sentence case for article titles: only the first word and proper nouns are capitalised. All other words remain lowercase. When your work will be reviewed, published, or cited within these fields, using the correct capitalization style shows attention to detail and compliance with professional standards.
Wikipedia Title Case vs Other Styles
Title capitalization is not universal. The same title formatted in Wikipedia style will look different from APA, Chicago, MLA, or AP — and each difference is intentional. Use the style comparison tool to enter your title and see all nine styles side by side. If you need to convert a large list of titles, the batch capitalizer handles CSV and TXT imports for bulk workflows.
How the Wikipedia Capitalizer Works
Paste your title into the tool above. Select Wikipedia as the active style and the result appears immediately. Click "Explain" to see the rule applied to each word. Use the copy button or press ⌘↵ to copy the output. Everything runs in the browser — no account, no signup, no data sent to a server.
Wikipedia capitalization FAQ
No — Wikipedia uses sentence case for article titles. Only the first word and proper nouns are capitalized. This is different from most other style guides.
Wikipedia's editorial guidelines favor sentence case because it looks more natural for encyclopedic content and reduces disputes about which words qualify as "major".
Proper nouns include names of people, places, organizations, brands, and specific titles. Common nouns remain lowercase.
No — "United States" is a proper noun and would always be capitalized. Only non-proper words like articles and common nouns are lowercase.