Add Line Numbers
Add line numbers to text online with custom starting number and formatting options. Free line numbering tool for code and documents.
Output will appear here...
About Add Line Numbers
Add line numbers to any text or code. Customize the separator, starting number, and padding. Useful for code reviews, documentation, and referencing specific lines.
How to Use Add Line Numbers
Open Add Line Numbers
Navigate to Add Line Numbers in your browser — no installation or sign-up required.
Enter your data
Type, paste, or upload the content you want to process into the input area.
Configure options
Adjust any available settings to customize the output to your needs.
Get your result
The result appears instantly. Copy it to your clipboard or download it as a file.
Frequently Asked Questions
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