Add Line Numbers

A line numbering tool is an online utility that automatically adds sequential line numbers to the beginning of each line in your text instantly. Whether you're a developer sharing code snippets, a teacher creating reference materials, or a writer preparing numbered lists, our tool handles all your line numbering needs effortlessly.

This tool supports various numbering formats and customizable starting numbers. Simply paste your text, choose your numbering preferences, and get instant results with properly formatted line numbers. The processing is performed client-side, ensuring your content remains private and secure.

Line numbers are essential for code sharing and documentation. Developers need line numbers when sharing code snippets for easier referencing in code reviews, bug reports, and discussions. This is particularly important when collaborating remotely, as line numbers allow team members to reference specific lines without ambiguity.

Technical writers use line numbers in tutorials, documentation, and instructional materials to help readers follow along and reference specific steps. Educators benefit from adding line numbers to code examples, programming exercises, and step-by-step instructions. Content creators use numbered lines for procedural content, reference lists, and organized documentation.

The tool saves time by automating line numbering and ensures consistency across your content. It's particularly useful when preparing documentation, creating educational materials, or formatting code snippets for publication or presentation.

Code Reviews: Add line numbers to code snippets for easier discussion and feedback.

Documentation: Number steps in tutorials and instructional materials for easy reference.

Bug Reports: Include numbered code samples to help identify problem areas.

Educational Materials: Create numbered exercises and code examples for students.

Presentations: Format code slides with line numbers for better audience reference.

Using our line numbering tool is simple: paste your text into the input field, optionally customize the starting number and format, and numbered text appears instantly with sequential line numbers prefixed to each line. You can then copy the result with a single click.

The tool preserves all original content while adding line numbers, meaning your text remains unchanged except for the number prefix. This ensures your code, documentation, or content maintains its formatting and structure while gaining the benefit of line-by-line reference numbers.