Add line numbers

Add line numbers is a free online Text Tools tool that adds line numbers to the output instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.

How to use: Add line numbers →

Description

Adds line numbers to the output.

  • This tool runs the official CyberChef engine on the 26173 server. Avoid pasting secrets you would not send to any server.

How to use

Using Add line numbers takes three steps:

  1. Paste your data into the input box (or load the example).
  2. Configure the options to match your target format or scenario.
  3. Copy, download or inspect the output — it updates live as you type.

Use cases

Common situations where Add line numbers helps:

  • Adds line numbers to the output.
  • This tool runs the official CyberChef engine on the 26173 server. Avoid pasting secrets you would not send to any server.

FAQ

What is Add line numbers?

Add line numbers adds line numbers to the output. It runs entirely in your browser, so your data stays private.

Is Add line numbers free to use?

Yes. Add line numbers is free, unlimited and works without registration or installation.

Does my data get uploaded?

Is my data uploaded for this tool? — This tool is processed on our server by design; input is used only for the computation and is not stored.

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