Add Line Numbers

Paste or type your text in the input area and line numbers are added automatically. You can customize the starting number, padding style, and separator character to match your needs.

Three padding options are available: no padding (numbers as-is), space padding (right-aligned with spaces), and zero padding (leading zeros like 001, 002). Padding ensures consistent alignment for texts with many lines.

Yes. You can choose from several separators including a period, pipe, colon, or tab character. This lets you format the output to match your preferred style or destination format.

Yes! All processing happens entirely in your browser. Your text is never sent to any server. No data is collected, stored, or transmitted.

Adding line numbers is helpful for code reviews, referencing specific lines in documents, legal text formatting, creating numbered lists from plain text, and preparing content for technical documentation.