This tool adds sequential numbers to the start of each line, useful for referencing and documentation — generated live in your browser.
How to use it
- Paste your text or list.
- Each line is prefixed with its number.
- Copy the numbered result.
About Add Line Numbers
Numbered lines make it easy to reference specific entries in lists, instructions or code excerpts. This tool prefixes each line with a sequential number and a separator, starting from one. The original line content is preserved exactly after the number. It runs locally in your browser, so your text stays private.
FAQ
Where does numbering start?
Numbering starts at 1 and increases by one for every line, including blank lines.
Can I reference lines easily afterwards?
Yes — the visible numbers let you point to 'line 12' without ambiguity.
Is the original text changed?
Only a number prefix is added; the rest of each line is untouched.