Input
Configure options and edit source text on the left.
Line Number Adder / Remover
Add configurable line numbers or remove existing line number prefixes while preserving text order.
Output
Ready to copy.
What is Line Number Adder / Remover?
Add or remove line numbers with configurable start value and separator.
How to Use Line Number Adder / Remover
- 1Paste lines
- 2Choose add/remove mode
- 3Set start number
- 4Copy result
Benefits of Line Number Adder / Remover
- ✓Code review prep
- ✓Reference-friendly docs
- ✓Quick unnumbering
- ✓Consistent formatting
Use Cases
Teaching material
Bug reports
Transcript cleanup
Tips
💡
Use remove mode before re-numbering
💡
Keep separators simple
Related Tools
Frequently Asked Questions
Can I start numbering at 0?
Start value is configurable, including 0 if needed.
How are existing numbers removed?
Common leading number patterns are stripped from each line.
Educational Deep Dive
Line numbering improves referencing and collaboration, especially in technical communication and review workflows.
✓100% Free
✓No Signup
✓Browser-based (Private)
✓Last Updated: Today