Add Line Number | A free, easy online tool

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Line Numbers Added

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How the Line Number Adder Works

This tool adds line numbers to each line of your text, making it easy to reference specific lines in documents, code, or any text content. Perfect for documentation, code reviews, or creating numbered lists.

Features

Multiple Separator Styles: Choose between period (1.), colon (1:), parenthesis (1)), or dash (1 -)
Automatic Padding: Numbers are padded for proper alignment
Preserves Formatting: Maintains your original line breaks and spacing
Real-time Updates: See line numbers added instantly as you type
One-click Copy: Easily copy the numbered text to clipboard

Common Use Cases

Code Documentation: Reference specific lines when explaining code
Legal Documents: Add line numbers for contracts or agreements
Academic Papers: Number lines for easy citation
Poetry & Scripts: Add line numbers to poems or screenplay drafts
Meeting Minutes: Number agenda items or discussion points
Instructions: Create numbered step-by-step guides

Examples

Original Text:

First line
Second line
Third line

With Line Numbers (Period):

1. First line
2. Second line
3. Third line

With Line Numbers (Colon):

1: First line
2: Second line
3: Third line

Tips

The tool automatically pads numbers for alignment when you have 10+ lines
Empty lines are preserved and numbered
Switch between separator styles to match your document format
Works with any text format including code, prose, or lists

Privacy & Security

All line numbering happens directly in your browser. No data is sent to any server, ensuring complete privacy and security of your content.

Text Formatting Tools

Remove Spaces - Instantly remove spaces from your text, or if you like, only double spaces
Remove Line Breaks - Instantly remove line breaks from the text you type or paste
Remove Duplicate Lines - Instantly remove lines that appear multiple times in a list
Remove Empty Lines - Instantly remove blank lines from any text
HTML Tag Stripper - Strip every HTML tag out of pasted content and keep just the readable plain text.
Find and Replace - Find and replace text with literal, case-insensitive, or full regex matching. See the live match count.
Text Reverser - Instantly reverse any text online.
Remove Line Numbers - Remove line numbers from any text. Automatically detects and removes various numbering formats.