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.
About Wikipedia Title Case
Wikipedia title case is actually sentence case — only the first word of the title and any proper nouns are capitalized, while all other words remain lowercase. This is explicitly required by the Wikipedia Manual of Style (MOS:CAPS) and applies to all article titles, section headings, and category names across the English Wikipedia. The rationale is that sentence case is the natural form for English text and avoids the subjectivity of deciding which words in a title are "important enough" to capitalize. Sentence case also works better for very long titles and reduces unnecessary emphasis on common words.
Wikipedia Title Case Examples
These examples are generated in real time by the same engine that powers the tool above — every result is guaranteed to match the tool's output.
| Original (lowercase) | Wikipedia Style |
|---|---|
| the quick brown fox jumps over the lazy dog | The quick brown fox jumps over the lazy dog |
| a guide to writing about the world | A guide to writing about the world |
| why sleep is important for students | Why sleep is important for students |
| learning through failure and success | Learning through failure and success |
| notes on the art of writing without fear | Notes on the art of writing without fear |
| how to capitalize titles in academic writing | How to capitalize titles in academic writing |
| the effects of social media on mental health | The effects of social media on mental health |
| introduction to machine learning with python | Introduction to machine learning with python |
Common Wikipedia Edge Cases
- Proper nouns are always capitalized regardless of position: "the United States," "Python programming language."
- Acronyms and initialisms are preserved in their standard form: "HTML," "NASA," "UK."
- Brand names and trademarks retain their original capitalization: "iPhone," "eBay," "YouTube."
- The first word after a colon in a title is capitalized: "Science: A tool for understanding the world."
- Wikipedia does NOT capitalize words just because they are nouns — "the theory of evolution" is correct Wikipedia style.
Wikipedia vs Email
Wikipedia and Email both use sentence case — only the first word and proper nouns are capitalized. The rules are nearly identical in practice. The difference is context: Wikipedia sentence case applies to encyclopedia article titles and headings, while Email sentence case applies to professional email subject lines. Both styles reflect the modern preference for less-capitalized text in digital contexts, and both produce the same output for a given title.
Wikipedia capitalization FAQ
Common questions about using TitleCasePro for Wikipedia title case.
The Wikipedia title capitalizer applies Wikipedia's sentence case rules to any title. Unlike other style guides, Wikipedia uses sentence case: only the first word and proper nouns are capitalized. All other words remain lowercase.
Wikipedia sentence case capitalizes only the first word of the title and proper nouns (names of people, places, organizations, brands). All other words — including major nouns and verbs — remain lowercase. Example: "The history of the United States" (only "United States" is capitalized as a proper noun).
Yes. TitleCasePro applies Wikipedia's sentence case standard: first word capitalized, proper nouns capitalized, everything else lowercase.
It lowercases all words except the first and proper nouns. Even principal words like main verbs and nouns become lowercase unless they are proper names.
Yes. Click "Explain" to see each word labeled — for example, "history — common noun, lowercase per Wikipedia sentence case."
Yes. Click the Copy button or press ⌘↵ to copy the result.
Yes. The Compare Styles tool shows Wikipedia sentence case next to all 8 title case styles — the contrast is immediately visible.
Yes. If you are writing or editing Wikipedia articles, the tool formats your title to Wikipedia's sentence case standard.
Yes. Some academic and web content guidelines prefer sentence case for headings and titles. The tool applies it correctly.
Yes. The tool handles book titles in Wikipedia sentence case format.
Yes. Wikipedia uses sentence case for section headings as well. The capitalizer formats any heading text to Wikipedia standards.
Yes. Completely free with no account or usage limit.
Yes. Runs entirely in your browser — no server, no account, works on any device.