Regex Editor & Tester

Matches sequences of simple English sentences, where each sentence begins with a capitalized word, contains lowercase words separated by spaces, and ends with a period. The pattern can capture multiple consecutive sentences, and a trailing negative lookahead rejects matches followed by alphanumeric text and whitespace, helping avoid partial matches. Useful for extracting or validating strictly formatted sentences, though it won't handle numbers, mid-sentence punctuation, or mixed-case words.