Add Line Numbers

Add line numbers to your text in seconds using the Add Line Numbers Tool. This simple browser-based utility lets you automatically prefix each line with a number, with full control over starting value, separator style, and whether blank lines are included.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total characters: 0
Options
Number blank lines
Maximize output

How to Use:

Paste or type your text into the input box on the left. If you have a file instead, use the Choose File button to import it. You’ll see your numbered output appear instantly on the right.

Customize the behavior using the Options panel. You can start numbering from any value, choose your own separator, and toggle whether empty lines should be numbered. The output updates live as you type or change settings. Below the result, you’ll find a character counter and buttons to copy or export the result.

What the Add Line Numbers Tool Does:

The Add Line Numbers Tool processes multiline text and inserts a number at the beginning of each line. You can include or skip blank lines, adjust the starting number, and change the delimiter (like :, ., or -). It updates in real time and doesn’t send your data anywhere everything runs in your browser.

Example:

Input:

apple
banana
cherry

Options:

  • Start from: 10
  • Separator: :
  • Number blank lines: on

Output:

10: apple
11: banana
12: cherry

Common Use Cases:

The Add Line Numbers Tool is helpful for numbering items in lists, preparing code samples, formatting transcripts, or organizing documents for reviews. Whether you’re working on technical notes, writing poetry, or managing a plain-text checklist, this tool makes it easy to apply consistent, readable line numbers without manual editing.

Useful Tools & Suggestions:

If you’re working with code or long-form text, Count Text Lines can help verify everything’s in order after numbering. And when you want to add structure beyond just numbers, Indent Text helps visually group or format the content for easier scanning and readability.

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