Free Online Text Line Number Adder Tool

Easily add sequential line numbers to any text with this free online tool. Perfect for code snippets, poetry, lists, and more!

Starting number:

Increment by:

Number format: Plain (1, 2, 3) Leading zero (01, 02, 03) Brackets ([1], [2]) Parentheses ((1), (2)) Period (1., 2.) Colon (1:, 2:)

Number alignment: Left Right

Separator:

0 lines 0 words 0 characters

What is a Line Number Adder?

A line number adder is a useful tool that automatically prepends sequential numbers to each line of text. This simple yet powerful functionality has numerous applications across different fields and use cases.

Why Use Our Line Numbering Tool?

Our free online line number adder offers several advantages:

• Quick and easy - Add numbers to hundreds of lines in seconds
• Fully customizable - Control starting number, increment, formatting and more
• No installation needed - Works directly in your web browser
• Privacy focused - Your text never leaves your computer
• Completely free - No registration or payment required

Practical Applications

This tool is invaluable for:

• Programmers - Number code snippets for documentation or debugging
• Writers - Add line numbers to poetry or manuscripts
• Teachers - Create numbered exercises or reference materials
• Students - Organize notes or research data
• Data analysts - Structure raw data for processing

How to Use the Line Number Adder

1. Paste your text into the input box
2. Adjust the numbering options as needed
3. Click "Add Line Numbers"
4. Copy the results or clear to start over

Advanced Features

Beyond basic numbering, our tool offers:

• Custom starting points - Begin numbering from any value
• Flexible increments - Count by 1, 2, 5, or any number
• Multiple formats - Choose from plain numbers, leading zeros, brackets and more
• Alignment options - Left or right align numbers for neat columns
• Custom separators - Use spaces, tabs, or any character between numbers and text

Frequently Asked Questions

Does this tool work with large documents?

Yes, our line number adder can handle documents with thousands of lines efficiently. However, extremely large documents may slow down your browser temporarily during processing.

Can I number lines in reverse order?

While there's no direct reverse option, you can achieve this by setting a high starting number and using a negative increment value.

Is there a character limit?

The tool can process up to 100,000 characters at once, which is more than enough for most use cases.

Does the tool preserve empty lines?

Yes, empty lines are preserved and numbered like any other line in your text.