How to Use Line Number Adder
Paste any text and the tool instantly adds sequential numbers to the beginning of each line. Choose your starting number, pick from dot, colon, or parentheses format, enable zero-padding for aligned numbers, and optionally skip blank lines. Perfect for numbering code snippets before sharing, creating ordered lists, or adding reference numbers to review documents.
Common use cases
- Add line numbers to code snippets for code review sharing
- Number items in presentation or teaching materials
- Add reference numbers to a long list automatically
- Improve collaborative review by tagging lines for discussion
Frequently Asked Questions
Enter any number in the "Starting number" field and numbering begins from that value — useful for continuing a numbered list from where you left off.
Choose from four formats: dot (1.), colon (1:), parentheses ((1)), or right-parenthesis (1)). Pick the one that suits your use case.
With "Skip blank lines" enabled (default), blank lines are kept as-is without being numbered. Uncheck to assign a number to every line including blank ones.