Tool Hub

Line Numbering

Add line number prefix (start · padding · separator)

Output

How to use

  1. Paste or type the text to number into the input area.
  2. Set the starting number, pad width, and separator string.
  3. Read the numbered output instantly in the output panel.
  4. Copy the result with the copy button.

Examples

  • With start 1, pad 2, separator ": ", the lines "first", "second", "third" become "01: first", "02: second", "03: third".
  • Setting start to 10 and separator to ". " produces "10. first", "11. second", useful for numbered list formatting.

Verify outputs before using in production. No warranty — see Terms.