This online calculator numbers lines of text

The reverse line calculator is a simple tool that takes a block of text as input, breaks it into individual lines, and then reverses the order of the lines. This can be useful in a variety of situations where you need to quickly reverse the order of lines in a document or piece of code, such as when working with logs, scripts, or data files.

This online calculator splits string by regular expression and outputs the list of matches (or first matched group)

is a tool that allows you to split a list of strings based on a regular expression pattern.