Add Line Numbers to Text

Add Line Numbers to Text instantly with our free online tool. Paste your text, choose options, and copy the result. 100% browser-based.

Input Text

0 lines

Numbered Text

Processed — 0 lines numbered

Numbering Options

Numbering Style

Number Format

Start Number

Step/Increment

Leading Zeros

Fixed Digits

Custom Format (use %n for number)

Number only non-empty lines

Live preview (disable for large texts)

How to Add Line Numbers to Text

Paste your text in the input area on the left or upload a .txt file.
Choose your numbering options - style, format, starting number, etc.
Copy or download the numbered text from the output area.

Why Number Lines?

Line numbering is useful in many scenarios:

Transcripts

Reference specific lines in interviews or legal proceedings

Code Reviews

Discuss specific code sections with team members

Legal Documents

Cite specific paragraphs or clauses accurately

Comparison With Other Tools

Feature	Our Tool	Common Alternatives
Leading zeros	✓ Yes	✗ Rarely
File upload	✓ Yes	✗ Often server-side
Custom formats	✓ Full	✗ Limited

Zaheer Ahmed

A civil engineer with a strong love for numbers, teaching, and building practical digital tools. With a Bachelor’s in Civil Engineering, a postgraduate degree in Project Management, and 12 years of teaching experience, he blends technical expertise with creativity. His passion for math and web development drives him to create clear, useful calculators that simplify everyday problem-solving.