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text · lines
Line Numberer
Prefix every line with its 1-based number, right-aligned, followed by a colon. Blank lines are numbered too — the count is exact.
A little guidance. A better result.
How to use Line Numberer
Prefix every line with its number — blank lines counted, output is exactly what downloads.
Prepare your input
Paste the text with its original line breaks.
Use the workspace
Review the numbered output.
Check your result
Check the first and last labels before saving.
Know the limits
Blank lines are numbered too. Numbering changes the text and should not be added to code you intend to execute.
Where does my input go?
This browser tool processes your input on your device. Optional analytics is a separate choice; it is not needed to use the tool. Keep your original until you have checked the result.
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