Sentence Case Converter
Transform text to proper sentence capitalization—instantly and free.
What is Sentence Case?
Sentence case (also known as proper case or standard case) is a text capitalization style where only the first letter of a sentence and proper nouns are capitalized. This text case format follows the natural capitalization rules used in books, newspapers, and professional writing. When you need to change text case or capitalize text properly, sentence case is the most common format in English writing.
When to Use Sentence Case:
Sentence case makes text easier to scan and read because our brains are trained to recognize this pattern from decades of reading books, articles, and documents.
- Writing blog posts or articles? - Sentence case is your go-to format. It's what readers expect for body text—natural, easy to scan, and professionally polished without feeling stuffy.
- Academic papers and reports - Required format for most body text in scholarly writing
- Product descriptions and marketing copy - Easier to read than all caps or excessive title case
- Social media posts - More approachable and less "shouty" than all caps
- Document formatting - Converting inconsistent capitalization to a professional standard
How to Use This Sentence Case Converter
Using this text case converter is incredibly simple—no technical knowledge required:
- Paste Your Text - Got some messy text? Just copy and paste it into the box above—works with everything from a single sentence to entire documents.
- Click "Convert to Sentence Case" - Hit the convert button and watch your text transform instantly. The tool automatically identifies sentence boundaries and proper nouns to apply correct capitalization.
- Copy Your Formatted Text - Click the "Copy" button or manually select and copy your newly formatted text. That's it—you're done!
The converter works entirely in your browser, which means your text never gets sent to a server. Your content stays private and secure on your device.
Common Uses for Sentence Case Conversion
Fixing ALL CAPS Text
We've all received emails or messages that are ENTIRELY IN CAPITAL LETTERS. Whether it's an overexcited colleague or text copied from an old system, all-caps text is hard to read and can come across as shouting. Converting to sentence case makes the message instantly more professional and readable.
Example:
"PLEASE
REVIEW THE ATTACHED REPORT AND SEND YOUR FEEDBACK BY FRIDAY."
"Please
review the attached report and send your feedback by Friday."
Converting Title Case Headlines
Sometimes you'll copy a headline or title that has Every Word Capitalized (title case) but you need it in regular sentence format for your document or email. Rather than manually retyping, convert it instantly.
Example:
"How To
Build An Effective Marketing Strategy For Small Business"
"How
to build an effective marketing strategy for small business"
Cleaning Up Mixed Capitalization
Ever copy text from a PDF or scan that has RaNdOm CaPiTaLiZaTiOn errors? Or text where someone randomly capitalized words for Emphasis? Sentence case standardizes everything.
Example:
"the
Company WILL release its NEW product Next Month in california"
"The
company will release its new product next month in California"
Reformatting Copied Content
When you copy text from websites, PDFs, or old documents, the capitalization often gets mangled. You might end up with inconsistent formatting, random caps, or awkward line breaks that affect capitalization. This tool standardizes everything to clean, professional sentence case.
Email and Communication Formatting
Professional emails should be easy to read and appropriately formatted. If you're pasting content from various sources into an email, running it through a sentence case converter ensures consistency and professionalism. Your recipients will appreciate the clear, readable formatting.
Content Writing and Editing
Writers and editors often need to convert text between different case formats. Maybe you drafted something in title case but your style guide requires sentence case. Or perhaps you're cleaning up a draft with inconsistent capitalization before publication. This tool speeds up the editing process significantly.
Sentence Case Rules and Examples
Understanding the rules behind sentence case helps you use this tool effectively and know when to manually adjust results for special cases.
Basic Sentence Case Rules
Rule 1: Capitalize the first letter of each sentence
The first word after a period, exclamation point, or question mark always gets capitalized.
"The meeting starts at noon. Please be on time."
"The meeting starts at noon. please be on time."
Rule 2: Capitalize proper nouns
Specific names of people, places, organizations, brands, and titles remain capitalized regardless of position.
"Sarah went to Paris to visit the Eiffel Tower."
"sarah went to paris to visit the eiffel tower."
Rule 3: Lowercase everything else
Common nouns, verbs, adjectives, and other words that aren't proper nouns or sentence starters should be lowercase.
"The manager reviewed the quarterly report."
"The Manager reviewed the Quarterly Report."
Rule 4: Preserve acronyms and abbreviations
Standard acronyms like NASA, FBI, or CEO typically stay in capitals.
"The CEO announced that NASA approved the project."
"She holds an MBA from Stanford University."
More Complex Examples
Example with multiple sentences
Before:
"JOHN SMITH WORKS FOR GOOGLE IN CALIFORNIA. HE MANAGES THE
MARKETING TEAM. THE COMPANY WAS FOUNDED IN 1998."
After:
"John Smith works for Google in California. He manages the
marketing team. The company was founded in 1998."
Example with proper nouns
Before:
"the united nations held a meeting in new york. representatives
from france, japan, and brazil attended."
After:
"The United Nations held a meeting in New York. Representatives
from France, Japan, and Brazil attended."
Example with acronyms
Before:
"THE FBI AND CIA WORKED WITH NATO ON THE INVESTIGATION."
After:
"The FBI and CIA worked with NATO on the investigation."
Special Cases to Watch
While this converter handles most situations automatically, you may occasionally need to manually adjust:
- Brand names with unusual capitalization - Some brands like "iPhone" or "eBay" have specific capitalization that may need manual correction
- Titles within sentences - Book titles, movie titles, or formal document names may require title case even within sentence case text
- Sentences starting with numbers - "2024 was a great year" is technically correct, though some style guides prefer spelling out numbers at sentence starts
For most everyday use—emails, documents, articles, and general writing—the automated conversion handles everything perfectly.
Sentence Case vs. Other Text Cases
Understanding how sentence case compares to other capitalization styles helps you choose the right format for your content.
Sentence Case vs. Title Case
Sentence Case
Only the first word and proper nouns are capitalized
"The best practices for social media
marketing"
Title Case
Most major words are capitalized (articles, short prepositions, and conjunctions are typically lowercase)
"The Best Practices for Social Media
Marketing"
When to use each:
- Sentence case: Body text, emails, paragraphs, most written content
- Title case: Headlines, book titles, formal document titles, section headers
Sentence Case vs. lowercase.
Sentence Case
First letter and proper nouns capitalized
"Please send the report to John by
Friday."
lowercase
Everything in lowercase, no capitals at all
"please send the report to john by
friday."
When to use each:
- Sentence case: Standard writing, professional communication, published content
- lowercase: Casual messaging, artistic effect, certain brand styles, URLs
Sentence Case vs. UPPERCASE
Sentence Case
Standard capitalization with proper nouns
"The conference will be held in Boston
next month."
UPPERCASE
Every letter capitalized
"THE CONFERENCE WILL BE HELD IN BOSTON
NEXT MONTH."
When to use each:
- Sentence case: Almost all normal writing situations
- UPPERCASE: Acronyms, emphasis (sparingly), certain design elements, legal documents
Sentence Case vs. camelCase
Sentence Case
Natural language with spaces and standard punctuation
"User profile settings"
camelCase
No spaces, each word except the first starts with a capital
"userProfileSettings"
When to use each:
- Sentence case: Human-readable content, articles, emails, documents
- camelCase: Programming variable names, file naming in code, technical documentation
Quick Comparison Table
| Text Format | Example | Common Use |
|---|---|---|
| Sentence case | "The quick brown
fox" |
Articles, emails, body text |
| Title Case | "The Quick Brown
Fox" |
Headlines, titles |
| lowercase | "the quick brown
fox" |
URLs, hashtags, casual text |
| UPPERCASE | "THE QUICK BROWN
FOX" |
Acronyms, emphasis |
| camelCase | "theQuickBrownFox" |
Programming, variables |
Want to experiment with all these formats? Our main Case Converter lets you switch between all text case styles instantly.
Frequently Asked Questions
What exactly is sentence case format
Sentence case is the standard capitalization style used in most English writing. It means you capitalize only the first letter of each sentence and proper nouns (specific names of people, places, brands, etc.). Everything else stays lowercase. This is the format you see in books, news articles, professional emails, and published content. It's called "sentence case" because it follows the natural capitalization rules you use when writing complete sentences.
When should I use sentence case instead of title case?
Use sentence case for body text, paragraphs, email content, article text, and any longer-form writing. Title case is better for headlines, document titles, section headers, and formal names. Think of it this way: sentence case is for sentences you read, title case is for titles you scan. If you're writing content that people will read word-for-word (like an email, article, or report), sentence case is almost always the right choice. It's easier to read and feels more natural.
Does this tool work with multiple paragraphs?
Yes! You can paste as much text as you need—from a single sentence to multiple paragraphs or even entire documents. The converter automatically identifies sentence boundaries (periods, question marks, exclamation points) and applies proper capitalization throughout. It handles line breaks, paragraph spacing, and maintains your original text structure while fixing the capitalization.
Is my text secure when I use this converter?
Absolutely. This sentence case converter runs entirely in your browser using JavaScript. Your text never gets uploaded to a server or stored anywhere. The conversion happens locally on your device, which means your content stays completely private. Once you close or refresh the page, your text is gone—nothing is saved or logged. This is especially important if you're working with sensitive information, confidential documents, or private communications.
Can I convert text in other languages?
The converter works with any Latin alphabet text (English, Spanish, French, German, etc.). The basic capitalization rules—first letter of sentences and proper nouns—apply across most Latin-based languages. However, capitalization rules can vary by language. For example, German capitalizes all nouns, not just proper nouns. The tool applies standard English sentence case rules, so if you're working with other languages, you may need to manually adjust for language-specific capitalization conventions.
What's the difference between sentence case and proper case?
These terms are often used interchangeably, and in most contexts they mean the same thing: capitalize the first letter of sentences and proper nouns, lowercase everything else. Some style guides make subtle distinctions, but for practical purposes—and for this tool—sentence case and proper case refer to the same standard capitalization format. You'll also sometimes see it called "standard case" or "normal capitalization."