Sentence Case Converter
Fix text typed in all caps or random capitals. Capitalize the first letter of each sentence, lowercase the rest, and keep acronyms and names.
Your text
Result
What sentence case is
Sentence case capitalizes the first letter of each sentence and puts the rest in lowercase, the way you would write a normal paragraph. It is the easiest style to read, and many brands now use it for headings, buttons and email subject lines because it feels friendly and calm.
This converter is most useful when text arrives in the wrong shape: a heading typed with caps lock on, a client brief in ALL CAPS, or a product feed where every word starts with a capital.
How it decides what to capitalize
- A new sentence starts after a period, question mark, exclamation mark or ellipsis followed by a space.
- Common abbreviations like "Dr." and "e.g." do not start a new sentence.
- A short acronym in capitals, like SEO or CRM, is kept when the words around it are in lowercase. A whole line of capitals is treated as shouting and converted.
- The pronoun "I" and forms like "I'm" and "I'll" stay capitalized.
- Each new line can start a new sentence, which suits lists and headings.
The tool cannot know which words are names, places or brands. Add them to the "Words to keep as written" box and they will be restored exactly as you typed them, such as Montreal or iPhone. Everything runs in your browser.
Frequently asked questions
Can I reverse sentence case later?
Not reliably. Once capitals are removed, the tool cannot tell which words were names or acronyms. Keep a copy of your original text if you might need it.
Does it work for French and other languages?
Yes, for any language that uses capital letters, including accented letters. The abbreviation list is in English, so check abbreviations in other languages after converting.
Should headings use sentence case or title case?
Both are fine. Sentence case is easier to read and to keep consistent, which is why many style guides now prefer it for web headings. Choose one style and use it across your site.