Add Line Numbers

Add line numbers to text instantly with our free online Add Line Numbers tool. Number each line of text, code, lists, scripts, transcripts, notes, or documents with custom formatting and copy the clean output in seconds.

Whether you want to add numbers before each line, start numbering from a custom value, skip empty lines, add leading zeros, or format code snippets, this fast and simple line number generator helps you organize multiline text easily.

What Is an Add Line Numbers Tool?

An Add Line Numbers tool is an online text formatting utility that automatically adds sequential numbers to each line of text. Instead of numbering lines manually, you can paste your text into the tool and instantly generate a numbered version.

This tool is useful for:

• Adding line numbers to text
• Numbering each line automatically
• Formatting code snippets
• Creating numbered lists
• Adding reference numbers to scripts
• Formatting transcripts and notes
• Organizing logs, documents, and plain text data

How to Add Line Numbers Online

Using the Add Line Numbers tool is simple:

• Paste your text into the input box
• Choose your line numbering format
• Select the start number, prefix, suffix, or separator
• Click the add line numbers button
• Copy the formatted output

The line numbering process happens instantly inside your browser, so you can number text lines online without installing any software.

Line Number Formatting Examples

Add Numbers Before Each Line

Add sequential numbers before every line of your text.

Example

Apple
Banana
Orange

1. Apple
2. Banana
3. Orange

Perfect for:

• Numbered lists
• Step-by-step instructions
• Notes and outlines
• Reference text

Add Line Numbers to Code

Number lines of code to make code snippets easier to read, review, and reference.

Example

const name = "John";
console.log(name);
return name;

1. const name = "John";
2. console.log(name);
3. return name;

Useful for:

• Code reviews
• Programming tutorials
• Debugging notes
• Developer documentation

Start Line Numbers from a Custom Number

Choose a custom starting number instead of always starting from 1.

Example

First item
Second item
Third item

10. First item
11. Second item
12. Third item

Helpful for:

• Continuing numbered lists
• Document references
• Custom formatting
• Long text sections

Add Leading Zeros to Line Numbers

Create zero-padded line numbers such as 001, 002, and 003 for cleaner alignment.

Example

Line one
Line two
Line three

001. Line one
002. Line two
003. Line three

Great for:

• Large text files
• Log formatting
• Script references
• Aligned output

Skip Empty Lines

Number only non-empty lines while keeping blank lines unchanged.

Example

Apple

Banana
Orange

1. Apple

2. Banana
3. Orange

Useful for:

• Clean text formatting
• Paragraph-based text
• Notes with spacing
• Readable documents

Custom Line Number Format

Customize how line numbers appear by adding a prefix, suffix, separator, or custom label.

Example

Introduction
Main Topic
Conclusion

Line 1: Introduction
Line 2: Main Topic
Line 3: Conclusion

Popular custom formats include:

• 1. Text
• 1) Text
• [1] Text
• Line 1: Text
• 001. Text
• Text 1

Why Use Our Line Number Generator?

Our online line number generator is designed for speed, simplicity, and flexible text formatting.

Fast Line Numbering

Add line numbers to multiline text instantly without manual editing.

Free to Use

No signup, payment, or installation is required.

Custom Numbering Options

Choose start number, prefix, suffix, separator, leading zeros, and empty line handling.

Copy and Paste Ready

Copy the numbered output and use it in documents, code, scripts, reports, or notes.

Mobile Friendly

Use the tool easily on desktop, tablet, or mobile devices.

Common Use Cases

For Developers

Developers can use this tool to add line numbers to code snippets, scripts, configuration files, and debugging notes.

• Add line numbers to JavaScript code
• Number Python code lines
• Format HTML and CSS snippets
• Create code references for tutorials

For Writers and Editors

Writers and editors can number lines in drafts, scripts, article outlines, transcripts, and document sections.

• Number script lines
• Add references to drafts
• Organize editing notes
• Format text for review

For Students and Teachers

Students and teachers can use line numbering to prepare assignments, notes, classroom material, and study documents.

• Add line numbers to essays
• Format study notes
• Create reference lists
• Number text for discussion

For Data and Log Review

Line numbers make logs, copied data, and long text files easier to inspect and reference.

• Number log entries
• Review plain text data
• Find specific lines quickly
• Organize copied output

Add Line Numbers Online vs Microsoft Word

Microsoft Word can display line numbers inside a document layout, but an online line number generator adds actual numbers directly into your plain text. This is useful when you want to copy, paste, export, or share numbered text outside a document editor.

Use this online tool when you need numbered text for code snippets, plain text files, scripts, transcripts, notes, emails, or web content.

Privacy and Security

Your text is processed directly in your browser. This means you can add line numbers quickly without uploading files or installing software.

This tool is useful for formatting:

• Code snippets
• Private notes
• Internal documents
• Draft content
• Plain text lists