Sentence Case Converter – Text to Sentence Case Online

Convert any text into sentence case instantly. This tool makes the first letter of each sentence uppercase and converts the remaining text to lowercase. It is useful for fixing all caps text, formatting paragraphs, normalizing messy text, or making sentences look clean and readable.

Or upload a text (.txt) file:

Sentence Case Options Title-Style Capitalization (e.g., India, Google) Always UPPERCASE Words (e.g., NASA, HTML)

How to Use This Tool

Follow these simple steps to format your text automatically. Copy or export to use in bios, posts, captions, and more:

Enter your text: Type or paste any normal text into the first input box or you can upload the text (.txt) file. The tool will capitalize the first letter of each sentence.
Options: This tool also lets you customize how your text is converted to sentence case. You can choose specific proper nouns so they stay capatilized, and you can also define certain words that should always appear in UPPERCASE. Simply input those words in their respective options fields, and the tool will format the text and it will appear in the output box.
Copy or export: Use the "Copy" button to copy the text or "Export" to download it.
Use anywhere: Paste the formatted text into documents, forms, or social media.

This tool works directly in your browser — no login or installation required.

What is sentence case?

Sentence case means writing text like normal sentences.

The first letter of each sentence is capital, and the rest of the words are lowercase. Proper nouns (names, places, etc.) stay capitalized.

Examples:

this is a simple sentence.
→ This is a simple sentence.

this is written in chicago by julie.
→ This is written in Chicago by Julie. (Proper nouns stay capitalized "Chicago" and "Julie")

Note: This tool does not automatically detect proper nouns. You need to enter the words you want to keep capitalized (like names or places) in the options box.

Where is sentence case used?

Sentence case is used in normal writing where sentences need to look natural and easy to read.

Paragraphs and general text
Articles and blog posts
Emails and messages
Descriptions and content writing

It is the most common writing style used in everyday text.

Sentence Case vs Title Case

Sentence case and title case are both text capitalization styles, but they are used differently.

In sentence case, only the first letter of each sentence is capitalized while the remaining words stay lowercase unless they are proper nouns.

Sentence Case Example:
The weather was pleasant during our trip to California.

In title case, the first letter of most words is capitalized. It is commonly used for headings and titles.

Title Case Example:
Top Places To Visit During a Trip to California

Sentence case is mostly used in paragraphs, articles, emails, and normal writing, while title case is commonly used in headings, titles, and page names.

Text Conversion Examples.

1. Basic Sentence Case Conversion

Convert fully uppercase text into normal sentence case.

Input:
THIS TOOL CAN CONVERT TEXT INTO SENTENCE CASE. IT ALSO MAKES SENTENCES EASIER TO READ.

Output:
This tool can convert text into sentence case. It also makes sentences easier to read.

2. Using Title-Style Capitalization and Uppercase Words Options

Keep specific names capitalized and selected acronyms fully uppercase.

Input:
john recently moved to new york and started learning html from nasa educational resources.

Options:

Title-Style Capitalization: new, york

Always UPPERCASE Words: html, nasa

Output:
John recently moved to New York and started learning HTML from NASA educational resources.