How does it know where a sentence begins?

The tool looks for standard sentence-ending punctuation (periods, exclamation marks, question marks) followed by a space.

Will it lowercase the rest of the sentence?

No, it only targets the first letter, leaving acronyms or proper nouns later in the sentence intact.

Capitalize the first letter of each sentence.

Text is processed temporarily and not stored. No files are uploaded to our server.

Source Text Input

Result Output

1Paste your text into the input field.
2The tool will automatically capitalize the very first letter of every sentence.
3Copy the grammatically corrected text.