Splitting text into sentences on every period sounds simple until "Dr. Smith arrived at 3.5 mph near the U.S. border" runs through it, since a period after an abbreviation, inside a decimal number, or inside an initial isn't actually the end of a sentence, and a naive split breaks that single sentence into several meaningless fragments. This tool extracts actual sentences from a block of text, numbering each one and offering it for export, while telling a true sentence boundary apart from a period that only looks like one. Useful for reviewing a long document one sentence at a time during an edit, building a numbered list of individual claims from an article to fact-check separately, or exporting a text's sentences as a clean list for a translation or proofreading workflow.