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Code Line Number Adder

tool tool

📖 How to Use

Click to view detailed usage instructions

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Code Line Number Adder

Online code line number adder tool to add line numbers to code.

Features

Customizable starting line number
Customizable padding digits
Format: line number | code
One-click copy result

How to Use

Enter code on the left
Set starting line number and padding
Click the "Add Line Numbers" button
Copy code with line numbers

Use Cases

Code formatting
Code presentation
Code review
Teaching display