Text
Browser-based
Add Line Numbers
Add line numbers to plain text or code snippets.
This tool runs in your browser. Your input is processed locally and is not uploaded.
How to use Add Line Numbers
Use Add Line Numbers when you need a quick text utility without installing software or creating an account. Enter your values or text in the tool above, review the instant result, then copy or save the output when the tool supports it.
- Works directly in a modern browser on desktop or mobile.
- Designed for fast repeat use from the root URL
/add-line-numbers. - Input stays in your browser unless a tool clearly says otherwise.
Features
- Instant browser-based results
- No sign-up required
- Mobile-friendly layout
- AdSense-friendly utility page
Use Cases
- Finish quick work tasks
- Check calculations or formatted output
- Create copy-ready results
Frequently Asked Questions
Is this tool free?
Yes. This RunX tool is free to use in your browser.
Does this tool upload my data?
No. The tool runs locally in your browser and does not send your input to a server.
Can I use it on mobile?
Yes. The interface is responsive and works on modern mobile browsers.