Line Number Adder
Add line numbers to any text. Choose from 6 numbering styles, set start number, pad numbers for alignment. Great for code and documents.
How to use the Number Lines
Paste your text
Paste any text — code, a script, a list, document paragraphs or anything line-based. Line numbers are added instantly with your chosen style.
Configure the format
Choose from 6 number styles (1. or 1) or [1] etc), set a custom starting number, skip blank lines, and optionally pad numbers so they align — 01, 02... 10 instead of 1, 2... 10.
Frequently asked questions
Is the Number Lines free to use?
Yes, the Number Lines is completely free. There is no sign-up, no account required, and no limit on how often you can use it.
Is my text private when using the Number Lines?
Yes, all text processing happens in your browser. Your text is not sent to any server and is not stored anywhere outside your device.
What devices does the Number Lines work on?
The Number Lines works on any device with a modern web browser — desktop, laptop, tablet, or phone. It is mobile-friendly and works offline once the page has loaded.