How to use: Line Numbering
Line Numbering is a free online Text Tools tool that add or remove line numbers on any text block 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.
Description
Add or remove line numbers on any text block.
- Text Tools
- Because everything is computed client-side, Line Numbering is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using Line Numbering takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Run
Examples
1 | first line …
Input
first line second line third line
Output
1 | first line 2 | second line 3 | third line
This output was produced by actually running the tool, not written by hand.
Use cases
Common situations where Line Numbering helps:
- Add or remove line numbers on any text block.
Parameters
This tool has no options — it works on the input alone.
FAQ
What is Line Numbering?
Line Numbering add or remove line numbers on any text block. It runs entirely in your browser, so your data stays private.
Is Line Numbering free to use?
Yes. Line Numbering is free, unlimited and works without registration or installation.
Does my data get uploaded?
No. All processing happens locally in your browser; nothing is sent to any server.
Good to know
- Everything runs client-side, so extremely large inputs are limited by your browser tab’s memory rather than by a server upload limit.