Add Line Numbers to Text Files, Code, or Documents
This tool allows you to add line numbers to text files, source code, scripts, or documents instantly. Whether you need to number lines in a .txt file or insert line numbers into programming code, our online line numbering tool makes it simple.
Unlike text editors that only display line numbers visually, this line number generator online makes the numbers part of the actual text so you can copy and share it anywhere.
How Line Numbering Works – Input & Output Example
def hello():
print("Hello")
return True
hello()
1. def hello():
2. print("Hello")
3. return True
4.
5. hello()
Roses are red,
Violets are blue,
Sugar is sweet,
And so are you.
1. Roses are red,
2. Violets are blue,
3. Sugar is sweet,
4. And so are you.
Common Uses for Line Numbering
When your Python, JavaScript, or other code throws errors, line numbers help you find and fix issues faster.
Reference specific lines in poetry, research papers, or legal documents for precise citations.
Create numbered step-by-step guides, recipes, or worksheets that are easy to follow.
Number lines in CSV files, logs, or structured data to identify specific records.
Add line numbers to screenplays or theater scripts for rehearsals and production planning.
Share code snippets with numbered lines for clear feedback and collaboration.
Add Line Numbers Online vs Microsoft Word or Notepad
✅ Faster Than Desktop Software
No need to open Word, configure settings, or learn menu options. Just paste and click.
✅ Portable & Accessible
Works on any device with a browser – computer, tablet, or phone. No installation needed.
✅ Privacy First
Your text never leaves your device. All processing happens locally in your browser.
✅ No Formatting Changes
Unlike word processors, we don't alter your original formatting – just add numbers cleanly.
✅ Multiple Export Options
Copy to clipboard or download as .txt. Use the numbered text anywhere.
| Feature | This Tool | Word Processors | Code Editors |
|---|---|---|---|
| Instant results | ✅ Yes | ❌ Multiple clicks | ⚠️ Depends on editor |
| Numbers become part of text | ✅ Yes | ❌ Display only | ❌ Display only |
| Works on any device | ✅ Yes | ⚠️ Limited | ⚠️ Limited |
| Free forever | ✅ Yes | ⚠️ Often paid | ✅ Usually free |
How Is This Different from Adding Line Numbers in Word?
Microsoft Word can display line numbers, but they often do not become part of the actual text when copied. With this online tool, the numbers are inserted directly into your content so they stay when you paste or export.
How Line Numbering Works – Input & Output Example
First line of text Second line here Third and final line
1. First line of text 2. Second line here 3. Third and final line
The numbers are inserted into the actual text — so when you copy and paste, they come with it. Unlike Microsoft Word's line numbers, which are display-only.
How to Add Line Numbers in 3 Steps
- Paste your text into the input box above
- Choose your preferred numbering style
- Click "Add Line Numbers" and copy the result
💡 Pro tip: Use "Number Empty Lines" when you need to maintain exact line counts in code. Turn it off for cleaner document formatting.
Other Ways People Search for This Tool
This tool handles all these common use cases:
Add line numbers in any format — instantly, free, and without any software.
Frequently Asked Questions
▶ How do I add line numbers to text online?
▶ What is the easiest way to add line numbers to a document?
▶ Can I choose different numbering styles?
▶ What does “Number Empty Lines” mean?
▶ Is my text safe?
▶ Is this tool free?
▶ What file types can I add line numbers to?
▶ Can I add line numbers to code snippets?
▶ Is there a limit to how many lines I can number?