Line numberer
Add sequential numbering to every line of text for easier reference in technical documents or code.
Controls
1: Sample line one 2: Sample line two 3: Sample line three
How this tool is meant to help
Add sequential numbering to every line of text for easier reference in technical documents or code. This page keeps one task in focus so you can move from input to output without jumping between tabs.
Typical workflow
Start with clean source data, review the live result, and export only after the output matches your goal.
Quality checks
Look for edge cases, confirm the formatting, and compare the result with a related utility when you need a second pass.
Related Utilities
Word counter, Remove duplicate lines, Remove extra spaces. This page keeps one task in focus so you can move from input to output without jumping between tabs.
Related Utilities
Word counter
Instantly calculate the total number of words in your document with real-time updates as you type.
Open Toolarrow_forwardRemove duplicate lines
Clean your datasets by identifying and removing identical rows of text with a single click.
Open Toolarrow_forwardRemove extra spaces
Standardize your text by eliminating unnecessary double spaces and trailing white spaces automatically.
Open Toolarrow_forwardPrecision
The tool keeps line order, blank lines, and custom increments stable while normalizing Windows and Unix line breaks.
Line numbering precision
The tool keeps line order, blank lines, and custom increments stable while normalizing Windows and Unix line breaks.
Local privacy
All processing happens locally in your browser. Your text never leaves your device.