What does Add Line Numbers do?

It prepends a sequential number to the start of each line in your text, with options to customize the separator, starting number, and padding.

Can I set the starting number?

Yes. You can configure what number the sequence starts from.

Yes. Numbers can be zero-padded for consistent alignment.

No. All processing is done in your browser.

Add line numbers to your text with customizable formatting

Use this free utility for the quick task, then continue in Writing Workspace for the main writing workflow.

Input

Paste or write your text here…

Output

Text with line numbers will appear here...

Add line numbers to your text with customizable formatting. No sign-up. Works in your browser.

Precise formatting

Add line breaks, indentation, numbers, or wrap text to exact specifications.

Developer-friendly

Handle tabs, spaces, line widths, and invisible characters with control.

Privacy-first

All processing happens in your browser. Your text never leaves your device.

Everything you need to know about add line numbers.

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