Add Line Numbers
Number each line — choose where to start and how numbers look.
- Processed locally — your files never leave your device
- Free, no sign-up
- No file limits
Use \n for a new line and \t for a tab.
Input
Output
How to use Add Line Numbers
- 1
Paste or type your text in the left box.
- 2
The result of “Add Line Numbers” appears instantly on the right — adjust the options if needed.
- 3
Copy the result or download it as a .txt file.
Features
- Custom formatAny start number and separator, including tabs.
- InstantThe result updates as you type — no button to press.
- PrivateYour text is processed in your browser and never uploaded.
Frequently asked questions
Can I start from 0 or 100?
Yes, set any start number and any separator such as “. ”, “) ” or a tab (\t).
Is my text stored anywhere?
No. Everything runs locally in your browser.
Is it free?
Yes, completely free with no limits and no sign-up.