Add Line Numbers
Add line numbers to any text. Customize the starting number, separator, and padding for numbered lists and code.
About This Free Online Add Line Numbers
Our free line numbering tool adds a sequential number to the beginning of each line in your text, turning a plain list or code snippet into a numbered list. Paste your text and the tool numbers every line instantly, which is useful for referencing specific lines in code reviews and documentation, creating numbered steps and instructions, counting items, and preparing text for printing. You can customize the starting number, the separator after each number, and padding so the numbers line up neatly. This saves you from typing numbers down the side of a long block of text by hand. Copy the numbered result with a single click. Everything runs locally in your browser as you type, so it is instant, free, requires no signup, and keeps your text private.
Features of Our Add Line Numbers
- Adds line numbers to every line of text
- Customizable starting number (default 1)
- Multiple separator options: dot, colon, parenthesis, custom
- Padding control for aligned numbering
- Instant results as you type or paste
- Copy numbered text to clipboard
- 100% private — browser-only processing
How to Use the Add Line Numbers
The Add Line Numbers works right in your browser — no signup, no installation. Follow these steps:
- Paste or type your text into the input area — each line will be numbered.
- Set the starting number, separator style, and padding as desired.
- View the numbered output instantly below.
- Click Copy to save the numbered text to your clipboard.
Frequently Asked Questions About Add Line Numbers
What is padding?
Padding adds leading zeros to line numbers so they align vertically. For example, with padding of 3, numbers display as 001, 002, ..., 010 instead of 1, 2, ..., 10. This keeps columns aligned for a clean appearance.
Can I use a custom separator?
Yes. Choose from dot (1.), colon (1:), parenthesis (1)), or enter any custom separator like " | " or " > ".
Does this work with empty lines?
Yes. Every line in your text is numbered, including empty lines. If you want to skip empty lines, use the Remove Empty Lines tool first.
Why Choose the Add Line Numbers?
Bulk text edits that would take ages by hand happen in one step with the Add Line Numbers. It applies your changes the moment you make them, entirely in the browser, so your content stays on your device and the result is ready to copy immediately.