Add a number to the start of every line in your text. Line numbering is useful for referencing specific lines when discussing code, turning a plain list into a numbered list, or preparing text for a document where each entry needs an index. You control where the count starts, the separator between the number and the text such as a dot, a bracket or a tab, and whether numbers are padded with leading zeros so they all line up neatly. Blank lines can be numbered or skipped depending on your preference. All the numbering runs in your browser, so nothing is sent anywhere, and you can copy the result straight into your editor or document.