Line Numbering Tool
Add a configurable numeric sequence to lines or remove the same clearly defined number format.
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How to use
Choose Add to set the first number, step, separator, and optional zero padding. Remove deletes a signed integer followed by the exact selected separator only at each line start.
Example
Input
red
green
blue
Output
1. red
2. green
3. blue
Limitations
Removal intentionally does not recognize bullets, Roman numerals, or numbering with a different separator.
Frequently Asked Questions
Can numbering count down?
Yes. Use a negative step, such as start 10 and step -1.
How are blank lines handled?
They receive numbers by default. Enable Skip blank lines to leave them unnumbered and avoid advancing the sequence.