🔢

Add / Remove Line Numbers

Add sequential line numbers to text with custom format, or remove existing numbers from numbered text.

Start Number

Separator

Padding

Skip empty lines (don't number)

About Add / Remove Line Numbers

Editing and transforming text manually is tedious and error-prone. Add / Remove Line Numbers automates the process so you can add sequential line numbers to text with custom format, or remove existing numbers from numbered text in one click. It works with any length of text, from a single sentence to thousands of lines, and runs entirely in your browser for complete privacy.

How to Use

Paste your text Enter or paste the text you want to process into the input field. There's no length limit for most operations.

Choose your options Select any relevant options or modes to control how your text will be transformed.

Process the text Click the action button to transform your text. Results appear instantly in the output area.

Copy the result Click the Copy button to copy the transformed text to your clipboard, ready to paste anywhere.

🔒 Privacy note: All processing happens locally in your browser. Your data is never sent to any server.

Why Use Add / Remove Line Numbers?

✍️

Save Hours of Manual Editing Add / Remove Line Numbers automates tedious text tasks that would take minutes or hours to do by hand. Process thousands of lines in a single click.

🔒

Complete Privacy Your text is processed entirely in your browser. Nothing is sent to any server, stored, or logged. Close the tab and your data is gone.

📋

Copy-Paste Friendly Designed for the real workflow: paste your text, transform it, copy the result. No account required, no file uploads, no unnecessary steps.

🌐

Works with Any Language Full Unicode support means Add / Remove Line Numbers handles English, Chinese, Arabic, emoji, and any other language or script correctly.

Frequently Asked Questions

Line numbers make text easier to reference in discussions, code reviews, or instructions ("see line 42"). They're also useful for creating numbered lists, SQL result sets, test case numbering, and formatted document output.

Remove mode uses regex to strip common line number patterns from the start of each line: numbers followed by ., ), :, or whitespace. It handles padded numbers (001, 002) and various separator formats automatically.