Question 1

How do I add line numbers to text?

Accepted Answer

Paste your text or code into the input area, pick a separator (colon, period, tab, space, dot, parenthesis), set the starting number and whether to pad with zeros, then the numbered text appears instantly in the output box.

Question 2

Can I start numbering from a number other than 1?

Accepted Answer

Yes. Set the Start number to any integer, including 0 or a negative number. The tool increments by 1 for each line by default, and you can also set a custom increment step.

Question 3

What is zero-padding and when should I use it?

Accepted Answer

Zero-padding adds leading zeros so all line numbers have the same width — for example 001, 002, 003 instead of 1, 2, 3. This keeps columns aligned in monospaced editors and is useful for code listings, logs and printed documentation.

Question 4

Are blank lines counted?

Accepted Answer

By default yes — every line including empty ones is numbered, matching how most code editors and line-counting tools work. You can toggle 'Skip empty lines' to leave blanks unnumbered if you prefer.