Sentence case Converter

How the conversion works

A capital follows the start of the text, each new line, and any period, question mark, or exclamation mark that is followed by whitespace (or the end of the text). That means “example.com” and “3.5” do not trigger a new sentence, which keeps URLs and measurements from looking broken after conversion. Line breaks still matter: a new line always allows the next letter to capitalize like a fresh paragraph. Domains and decimals are protected so everyday web and numeric text does not grow stray capitals.

When sentence case helps

It matches most body copy, chat replies, release notes, and documentation. It is gentler than Title Case and clearer than a block of lowercase when you still want proper sentence openings. Editors often ask for sentence case in CMS fields that previously forced Title Case everywhere. Support macros and help-center drafts benefit most when shouting text is softened without losing structure. Most editorial workflows prefer this shape for paragraphs and UI descriptions.

Abbreviations and edge cases

Abbreviations like “Dr.” still contain a period, so the next word may capitalize. Skim those spots after converting if your draft is abbreviation-heavy. Acronyms you want to keep loud (NASA, HTML) may need a quick re-capitalization pass—sentence case intentionally lowercases the rest of each sentence. After converting, skim domain names and version numbers—the rules are built to leave those alone. Abbreviation-heavy drafts deserve a quick skim after conversion for false sentence breaks.

Common use cases

• Cleaning pasted notes that lost capitalization
• Softening all-caps feedback into readable prose
• Preparing paragraphs before publishing docs
• Normalizing chatbot training snippets

Frequently asked questions