Sentence Case Converter
Convert text to sentence case, capitalising the first letter of each sentence.
Sentence Case Converter is a browser-based text tool on TextToolsBase. Convert text to sentence case, capitalising the first letter of each sentence. To use it, paste or type your text and view the result directly in your browser — no signup and nothing to install.
Capitalises the first letter after a full stop, question or exclamation mark; abbreviations and proper nouns may need a manual check, and existing capitals are lowered.
hello. THIS is two. ok → Pasting text where the casing is all over the place leaves you fixing the start of each sentence by hand.
This converter lowercases the text and then capitalises the first letter of every sentence, so it reads naturally.
How to use Sentence Case Converter
- Paste the sentence or paragraph you want to tidy.
- Sentence Case Converter capitalises the first letter after each full stop, question or exclamation mark.
- Copy the sentence-cased text, then fix any names it lowered.
Use cases
- Tidying notes that were typed in a hurry.
- Normalising an all-caps or all-lower paragraph.
- Cleaning copied text before publishing.
Good to know
Sentence Case Converter first lowers the text, then capitalises the letter that follows sentence-ending punctuation, so hello. THIS is two. ok becomes Hello. This is two. Ok. Because it works from punctuation, proper nouns and abbreviations such as Dr. can be affected and may need a manual touch-up. Numbers and spacing are preserved.
Frequently asked questions
Does it detect abbreviations?
Not reliably. A full stop in an abbreviation can start a new sentence, so review names and titles.
What happens after a quote or bracket?
Capitalisation follows the sentence-ending mark, so text just inside quotes may need a check.
Does it lowercase existing proper nouns?
Yes. It lowers everything first, so re-capitalise names after converting.