Add Line Numbers to Text - Free Online Line Numbering Tool

What is an Add Line Numbers Tool?

An Add Line Numbers tool is a text utility that automatically inserts sequential line numbers to each line of your text with customizable formats. It is perfect for code review, document referencing, legal documents, scripts, and any content that needs numbered lines for easy reference.

Line numbers are essential for clear communication when discussing text-based content. Whether you are reviewing code, editing scripts, or referencing specific passages in documents, line numbers provide a universal reference system that everyone can follow.

How to Use the Add Line Numbers Tool

Follow these simple steps to add line numbers to your text:

Paste Your Text: Enter or paste the text you want to number into the input area on the left.
Choose a Format: Select a preset format or customize your own prefix and suffix for the line numbers.
Select Position: Add numbers at the start (most common) or end of each line.
Optional Cleanup: Enable "Remove empty lines" to skip blank lines.
Copy Results: Copy the formatted text with line numbers to your clipboard or download it as a file.

Format Examples

Original text:

Hello World
This is a test
Third line

Format "1. " (Standard):

1. Hello World
2. This is a test
3. Third line

Format "#1 " (Hash):

#1 Hello World
#2 This is a test
#3 Third line

Format "Line 1: " (Verbose):

Line 1: Hello World
Line 2: This is a test
Line 3: Third line

Available Format Options

Prefix Options

The prefix appears before the line number. Common choices include:

Empty - Just the number (e.g., "1")
# - Hash symbol (e.g., "#1")
Line - Word prefix (e.g., "Line 1")
[ - Bracket (e.g., "[1")

Suffix Options

The suffix appears after the line number. Common choices include:

. - Period and space (e.g., "1. ")
: - Colon and space (e.g., "1: ")
) - Parenthesis and space (e.g., "1) ")
] - Bracket and space (e.g., "[1] " with prefix)
| - Pipe separator (e.g., "1| ")

Common Use Cases

Code Review: Reference specific lines during code review discussions. Makes feedback precise and actionable.
Legal Documents: Add line numbers to contracts, depositions, and legal briefs for court references.
Script Writing: Number lines in screenplays, stage plays, and audio scripts for production notes.
Academic Work: Add line numbers to poetry, passages, or excerpts for literary analysis and citations.

If you are working with text formatting, our Add Line Breaks Tool is the perfect companion for splitting text into individual sentences. You may also find the SRT to Text Converter useful for extracting subtitle text, the Character Counter for tracking text length, and the Headline Analyzer for evaluating the effectiveness of your writing.

Frequently Asked Questions

How do I add line numbers to text?

Simply paste your text into the input area, choose your preferred format (prefix, suffix, position), and the line numbers will be added automatically. You can add numbers at the start or end of each line.

What formats can I use for line numbers?

You can customize line numbers with prefixes (like "#" or "Line ") and suffixes (like "." or ": " or ") "). Common formats include "1. ", "#1 ", "Line 1: ", or just plain numbers. The tool supports any custom prefix and suffix combination.

Can I remove blank lines before adding line numbers?

Yes! Enable the "Remove empty lines" option to automatically strip blank lines from your text before adding line numbers. This creates a cleaner, more compact numbered list.

Can I add line numbers at the end of each line?

Yes, you can choose to add line numbers either at the start or at the end of each line. Select the "End of line" option to append numbers after your text content.

What is the difference between this tool and Remove Line Numbers?

The Add Line Numbers tool inserts sequential numbers at the start or end of each line, while the Remove Line Numbers tool strips existing line numbers from text to return the content to its original unnumbered form.

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Add Line Numbers