Add Line Numbers

Add sequential line numbers to each line of text.

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How to Use the Add Line Numbers

  1. 1

    Paste or Type Your Text

    Enter the text you want to transform in the input field. You can type directly or paste text from any source.

  2. 2

    Configure Options (If Available)

    Some tools offer additional options to customize the transformation. Adjust these settings as needed.

  3. 3

    View Results in Real-Time

    The converted text appears instantly in the output field. Results update automatically as you type.

  4. 4

    Copy the Result

    Click the "Copy Result" button to copy the transformed text to your clipboard, ready to paste anywhere.

Examples & Use Cases

Simple Numbered List

Input:

First item
Second item
Third item

Output:

1. First item
2. Second item
3. Third item

Code Style

Input:

function hello() {
  console.log("Hi");
}

Output:

1 | function hello() {
2 |   console.log("Hi");
3 | }

Bracket Format

Input:

Point A
Point B
Point C

Output:

[1] Point A
[2] Point B
[3] Point C

About the Add Line Numbers

The Add Line Numbers Tool automatically prefixes each line of your text with sequential numbers, creating numbered lists or adding reference numbers for easier navigation, discussion, and citation of specific lines.

Numbering Format Options

Customize how numbers appear:

  • Simple numbers - "1. ", "2. ", "3. " (with period and space)
  • Parentheses - "1) ", "2) ", "3) "
  • Brackets - "[1] ", "[2] ", "[3] "
  • Code style - Right-aligned with padding: " 1 | ", " 10 | "
  • Custom separator - Define your own format

Starting Number Options

Don't always need to start at 1:

  • Start from any number
  • Continue numbering from a previous section
  • Use zero-based numbering (0, 1, 2...)

Common Use Cases

  • Code review - Reference specific lines in discussions
  • Document review - Cite lines in feedback
  • Meeting agendas - Create numbered discussion points
  • Legal documents - Add line numbers for reference
  • Educational materials - Reference lines in worksheets
  • Poetry and lyrics - Number lines for analysis

Alignment and Padding

For documents with many lines, proper alignment matters:

  • Right-align numbers for consistent margins
  • Pad with spaces or zeros (001, 002 vs 1, 2)
  • Auto-calculate padding based on total line count

Professional Applications

Line numbers are essential in:

  • Legal briefs and court documents
  • Academic papers and manuscripts
  • Source code and programming
  • Script writing and screenplays
  • Technical documentation

Frequently Asked Questions

Can I start numbering from a number other than 1?

Yes, you can specify any starting number. This is useful for continuing numbering from a previous section or for specific formatting requirements.

How do I get right-aligned numbers like in code editors?

Use the code style format with padding. Numbers are right-aligned with spaces so that "9" and "10" have consistent margins (e.g., " 9 | " and "10 | ").

Will this work with blank lines?

Yes, blank lines receive numbers too. Every line, including empty ones, gets a sequential number. Remove blank lines first if you don't want them numbered.

Can I add numbers to only certain lines?

This tool numbers every line sequentially. For selective numbering, you would need to process specific portions separately or manually edit afterward.

How do I remove line numbers if I added them by mistake?

You can use a find-and-replace with a pattern like "^\d+\.\s" (for "1. " format) or use our text processing tools to remove the number prefixes.

What formats are standard for legal documents?

Legal documents typically use right-aligned numbers in the left margin, often every 5 lines (5, 10, 15...). Our tool offers flexible formatting to match various professional requirements.

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