Line Number Adder: Number Your Text Lines Instantly

# Line Number Adder: Number Your Text Lines Instantly

When you share a code snippet, paste a log file, or reference a specific line in a document, line numbers make communication precise. "Check line 47" is clearer than "look about halfway down." FreeToolJet's Line Number Adder prepends line numbers to any text with full control over formatting.

Customization Options

• Start at: Begin numbering from any integer (default: 1). Useful when referencing a range that starts mid-file.
• Separator: Choose between colon-space (: ), period-space (. ), tab, or any custom separator.
• Padding: Set to 0 for auto-width (pads to the width of the largest number), or specify a fixed width.

Common Use Cases

• Code reviews: Paste code and share with line numbers for precise feedback.
• Bug reports: Reference exact line numbers in error logs.
• Documentation: Add line-numbered code examples to articles and guides.
• Education: Number lines in assignments and exercises.

Tips

• Use auto-padding (width 0) so all numbers align neatly regardless of total lines.
• For Markdown documents, use . as separator to match GitHub-style line references.
• Combine with Sort Lines to organize before numbering.

Related Tools

• Sort Lines — Sort text before adding line numbers
• Whitespace Remover — Clean up text before numbering
• Remove Duplicate Lines — Deduplicate before numbering

Want more tools? Explore our full collection at FreeToolJet - we're constantly adding new utilities based on developer feedback.