Free Online Add Line Numbers

Add line numbers to any text. Customize format, separator, starting number, and zero-padding.

Input
Output

How to Use This Add Line Numbers

Paste text and click Add Numbers. Customize the starting number, separator, and zero-padding. All processing runs in your browser.

Can I start at a number other than 1?

Yes. Set the Start At field to any number, including 0.

What does auto-padding do?

It pads numbers with spaces so they align. If you have 100 lines, single-digit numbers get extra spaces to match the width of 100.

Is my data stored?

No. Everything runs locally in your browser.