Case Converter Tools

Sentence Case Converter

Convert text to sentence case, capitalising the first letter of each sentence.

PrivateYour text is processed on your device and never uploaded.
first letter per sentencerest lower-cased

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.

A sentence or paragraph
Sentence case
0 chars · 0 words
Example: 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

  1. Paste the sentence or paragraph you want to tidy.
  2. Sentence Case Converter capitalises the first letter after each full stop, question or exclamation mark.
  3. Copy the sentence-cased text, then fix any names it lowered.

Use cases

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.

Related Case Converter Tools