Add Line Numbers
TEXTPrepend line numbers to every line in your text.
ℹ️ About Add Line Numbers
Add Line Numbers is a free online text tool from Tools Coaster. Prepend line numbers to every line in your text. It is handy for line, numbers, format tasks. It runs entirely in your browser — no sign-up, no installs, and nothing you enter ever leaves your device.
📖 How to Use Add Line Numbers
1
Paste your text
Drop in any text — an article, email, code snippet, or a whole document.
2
Run Add Line Numbers
The transformation is applied instantly as you type or paste.
3
Review the output
The processed result appears in the output panel in real time.
4
Copy the result
One click copies the output to your clipboard, ready to paste anywhere.
💡 Examples
Worked example
INPUT
First line
Second line
Third line→
OUTPUT
1. First line
2. Second line
3. Third line🚀 Pro Tips
✓Paste straight from Word, Google Docs, PDFs, or web pages — formatting is stripped automatically.
✓Chain text tools together: clean whitespace, then change case, then count words.
✓Everything runs locally in your browser — your input is never uploaded to a server, so it is safe for private or sensitive data.
✓Large documents still process instantly because the work happens on your device, not a server.
✓Bookmark the tool for one-click access whenever you need it.