Free OnlineText Tools
Add Line Numbers
Add line numbers to any text. Customize numbering format, starting number, and separator for code and documents.
add line numbersline numberingnumber linestext line numberscode line numbers
Options
Key Features — Add Line Numbers
Customizable starting number
Multiple separator options (dot, colon, tab)
Left-pad numbers for alignment
Skip empty lines option
Instant preview and copy
Why Use This Tool — Add Line Numbers
Free Online Add line numbersLine numbering — for EveryoneFast & Easy Number linesText line numbers — 100% FreeFree Online Code line numbers
Privacy First
All processing happens in your browser. Your data never leaves your device.
Lightning Fast
Get instant results with zero wait time. No server delays, no loading screens.
Works Everywhere
Use on any device — desktop, tablet, or phone. No downloads or plugins needed.
Frequently Asked Questions — Add Line Numbers
Can I start numbering from a number other than 1?
Yes. Enter any starting number in the configuration field. This is useful when you are adding numbers to a continuation of a previous document or want to match specific line references in another system.
What separator options are available?
You can choose from several separators placed between the number and the text: a period and space, a colon and space, a tab character, a closing parenthesis, or a pipe character. Choose whichever format suits your document style.
Does the tool align numbers for different digit counts?
Yes. When left-padding is enabled, the tool adds spaces before shorter numbers so that all numbers are right-aligned. This means line 1 and line 100 will have their text starting at the same column, creating clean, readable output.