How do I use this tool?

Paste your text into the input area, configure the options (starting number, separator, padding), then click "Add Line Numbers". The numbered text will appear in the output area.

Can I choose the separator between line number and text?

Yes, you can choose from tab, space, dot-space (e.g., "1. "), or custom separator.

Padding adds leading zeros to line numbers so they all have the same width. For example, with padding of 3, line 5 becomes "005".

Is my data sent to a server?

No, all processing is done entirely in your browser. Your text never leaves your device.

Add Line Numbers

Add line numbers to text with customizable formatting. Choose starting number, separator, and padding options.

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