Case Converter
Convert text capitalization without retyping it. Choose upper, lower, title or sentence case and copy the output directly from the page.
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What is the Case Converter?
Convert text capitalization without retyping it. Choose upper, lower, title or sentence case and copy the output directly from the page.
How to use it
- 1Paste your original text.
- 2Select a capitalization mode.
- 3Copy the transformed text.
How it works
Upper and lower case use JavaScript Unicode casing. Title case capitalizes letters after non-letter boundaries; sentence case capitalizes after a sentence-ending mark.
From draft to heading
“the quick guide” becomes “The Quick Guide” in title mode.
Limitations & notes
- Title capitalization is a simple rule and does not apply publication-specific style guides.
- Locale-specific casing and acronyms may need manual review.
Frequently asked questions
What is the difference between title case and sentence case?
Title case capitalizes the first letter of each word, as in a book or headline: The Quick Guide To Browser Tools. Sentence case capitalizes only the first letter of each sentence, as in normal prose: The quick guide to browser tools. Many style guides, including Google's developer documentation style, prefer sentence case for headings because it reads faster and avoids debates over which small words to capitalize.
Does this title case follow AP or Chicago style?
No. It applies a simple rule: lowercase everything, then capitalize every letter that follows a space or other non-letter. Small words like a, of and the are capitalized too, and the letter after an apostrophe is also capitalized, so don't becomes Don'T. AP and Chicago style keep short articles and prepositions lowercase in the middle of a title. Review the output and fix those words manually.
Why did my acronyms and brand names change?
Title and sentence modes lowercase the whole text first, so NASA becomes Nasa, iPhone becomes Iphone, and proper nouns like London become london in sentence case. The word I in the middle of a sentence also turns into a lowercase i. After converting, scan for names, acronyms and product names and restore their correct capitalization.
How does sentence case decide where a sentence starts?
It capitalizes the first letter of the text and any letter that follows a period, exclamation mark or question mark plus a space or line break. Abbreviations can trigger false starts: e.g. something becomes e.g. Something. Text after a line break without ending punctuation, such as list items, is not capitalized. Uppercase and lowercase modes use standard Unicode casing, so accented letters like é and ü convert correctly.
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