A line counter tool is an online program or application that counts the number of lines in a text document or code file.

In computer programming and software development, it's often important to keep track of the number of lines of code in a project or file. This information can be useful for estimating project timelines, measuring code complexity, and assessing code quality.

A line counter tool can be used to count the number of lines in various file types, such as text files, source code files, HTML files, and more. Some line counter tools can also count the number of words or characters in a file.

Using a line counter tool can save time and effort compared to manually counting the lines in a file. It can also help to avoid errors that may occur when counting lines manually.

Line counter tools are commonly used by developers, programmers, and writers who need to keep track of the length of their text or code. They can be especially useful for large-scale projects or files, where manual counting may be impractical.

In summary, a line counter tool is an online program or application that counts the number of lines in a text document or code file. It's a useful tool for developers, programmers, and writers who need to keep track of the length of their text or code.