BYTETOOLS

Add Line Numbers to Text

Add sequential line numbers to any text online. Choose the start number, zero-padding and separator (dot, colon, paren or tab). Copy the result instantly.

  • Sequential numbering from any start value
  • Optional zero-padding for aligned columns
  • Separator choices: dot, colon, parenthesis, tab or space
  • Live preview updates as you type
  • Copy to clipboard or download as .txt
  • 100% private — nothing is uploaded

How to use the Add Line Numbers to Text

  1. 1

    Paste or type your text, one item per line.

  2. 2

    Set the starting number and, if you want aligned columns, enable zero-padding.

  3. 3

    Choose the separator that follows each number.

  4. 4

    Review the numbered result updating live below.

  5. 5

    Click Copy or Download to save your numbered text.

About the Add Line Numbers to Text

The ByteTools Add Line Numbers tool prefixes every line of your text with a running number. Paste a list, a code snippet or a document and get a cleanly numbered version you can copy or download — perfect for referencing lines in reviews, tutorials and printouts.

Customise the output to match your needs: set any starting number, zero-pad the numbers so they align in neat columns, and pick the separator that follows each number — a dot, colon, parenthesis, tab or plain space.

All numbering happens locally in your browser with JavaScript. Your text is never uploaded, stored or logged, so it is safe for confidential lists, code and drafts, and it works even when you are offline.

Frequently asked questions

How do I add line numbers to a block of text?

Paste the text into the box, one line per row. The tool immediately prefixes each line with a number starting at 1 (or any value you choose). Copy the numbered result with a single click.

Can I start numbering from a value other than 1?

Yes. Enter any starting number and the sequence counts up from there. This is handy when you are continuing from a previous page or referencing a specific range of lines.

What is zero-padding and why would I use it?

Zero-padding adds leading zeros so every number has the same width, turning 1, 2 … 10 into 01, 02 … 10. It keeps the numbers aligned in a straight column, which looks tidier in code listings and printed documents.

Does adding line numbers change my original text?

It only adds a number and separator to the start of each line; the rest of every line stays exactly as you pasted it. Blank lines are numbered too, so the count matches the true line positions.

Is my text sent to a server?

No. Numbering runs entirely in your browser with JavaScript, so nothing is uploaded or stored. It is safe for private code, lists and documents.

Related tools