✓ Runs locally in your browser

Add Line Numbers

Add aligned line numbers to notes, lists and code snippets.

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About this tool

What is Add Line Numbers?

Add Line Numbers prefixes every row with aligned numbering for reviews, notes and code discussions.

Three simple steps

How to use Add Line Numbers

  1. 01

    Paste the multiline text you want to number.

  2. 02

    Set the starting value and number format when available.

  3. 03

    Generate the numbered version and copy it.

Common questions

Add Line Numbers FAQ

Are blank lines numbered too?

The output follows the selected line handling, so inspect blank rows before using the result as a reference.

Is Add Line Numbers private to use?

Yes. Your text stays in the browser and is not sent to Toolnera for processing.