Add Line Numbers
Add line numbers to each line of text with customizable formatting. Free online tool to number lines with configurable start, separator, and padding.
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The line number tool prefixes each line of your text with its line number. You can customize the starting number, the separator between the number and text, and whether numbers should be padded with spaces for alignment.
This tool is useful for preparing code snippets for documentation, creating numbered lists from plain text, referencing specific lines in text, and formatting text for discussion or review. It handles texts of any length instantly.
All processing is done in your browser — your text is never stored or sent anywhere.
How to Use Add Line Numbers
- 1Paste your text into the input area.
- 2Set the starting number and separator character.
- 3Optionally enable padding for aligned number columns.
- 4Click the Copy button to copy the numbered text.