Add Line Numbers to Text Online Free

Add line numbers to each line of your text. Customize the starting number, separator style, and padding options for perfect formatting.

Last updated May 2026

Pro Tip

Enable "Zero-padding" when you have more than 9 lines to keep all numbers the same width for cleaner alignment in code or documentation.
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How to Use Add Line Numbers

1

Enter Your Text

Paste or type the text you want to add line numbers to.
2

Configure Numbering

Set the starting number, separator style, zero-padding, and whether to skip empty lines.
3

Preview the Output

See the numbered text update in real time as you adjust settings.
4

Copy the Result

Copy the numbered text to your clipboard with one click.

Why Use Our Add Line Numbers?

Custom Formatting

Choose from multiple separator styles and set a custom starting number.

Zero-Padding

Add leading zeros (01, 02, 03...) for consistent alignment across lines.

Live Preview

See the numbered output update instantly as you type or change settings.

100% Free

No hidden charges or premium features locked behind paywalls.

Privacy First

Files are processed in your browser and never uploaded to servers.

Works Everywhere

Compatible with desktop, tablet, and mobile browsers.

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