Add Line Numbers — Free Online Tool

Add numbers to the start of every line. Useful for code snippets, checklists, transcripts and printing numbered lists.

Save this tool Keep it in your list and reopen your work later — no sign-up, nothing uploaded.

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How to use Add Line Numbers

Paste your lines.
Pick a starting number and separator.
Click Add Numbers and copy.

Frequently asked questions

Can I skip blank lines?

Yes — tick "skip empty lines" and blank rows will not get a number.

Your privacy is protected

This tool runs entirely inside your browser. No file, text or number you enter is ever sent to our servers, stored, or shared. Close the tab and everything is gone.

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