Add Line Numbers
Add sequential numbers, letters, or roman numerals at the start of each line.
🔒 100% private
⚡ Instant results
∞ No limits
About Add Line Numbers
Add sequential numbers, letters, or roman numerals at the start of each line. It runs entirely in your browser — no content you enter is ever sent to our servers or stored anywhere.
Free to use with no daily limits and no account required.
💡 Common Use Cases
- Number lines in code for documentation
- Add step numbers to instructions
- Create numbered lists from plain text
- Add roman numeral labels to outline items
❓ Frequently Asked Questions
Yes, completely free with no sign-up, no account, and no daily usage limits.
No — all processing happens entirely in your browser. Nothing you enter is uploaded or stored.
Yes — the tool is fully responsive and works on smartphones and tablets.
Click the "⎘ Copy" button in the toolbar to copy the full text to your clipboard instantly.