Add Line Numbers
Prefix every line of text with sequential line numbers.
Numbered lines make text referenceable: "see line 42" beats "the part about halfway down". Code snippets for documentation, legal drafts, transcripts, and log excerpts all read better with explicit numbering — but adding numbers by hand doesn't survive the first edit.
Paste any text and this tool prefixes each line with a sequential, right-aligned number. The padding adjusts automatically to the total line count so columns stay aligned from line 1 to line 9,999.
How to use Add Line Numbers
- 1
Paste your text
Code, prose, lists — anything with lines.
- 2
Review the numbering
Numbers are padded so they align in a column.
- 3
Copy the result
Numbered text is ready to paste anywhere.
Features
- Right-aligned, padded numbering
- Handles thousands of lines instantly
- Preserves blank lines with numbers
Frequently asked questions
Common mistakes to avoid
- Numbering text that will be edited afterwards — add numbers as the last step.
- Using numbered text where the target system adds its own numbering, doubling the numbers.
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