Line Numbering

Online tool for adding numbers to text lines, lists, instructions, code, and documentation.

Обработка выполняется локально в браузере. Данные не отправляются на сервер.

For this tool, processing runs locally in your browser and data is not sent to the server.

Line Numbering is a free online tool for adding numbers to text lines and preparing numbered lists, instructions, code fragments, and documentation. You can choose number format, start value, step, separator, and a custom template with {n}. Processing runs locally in your browser and data is not sent to the server.

What it does

Output

Processing

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How to use

Paste a list, instruction, code block, or multiline text into the input field.
Choose the number format, start value, step, and separator.
If needed, configure empty line handling and number alignment.
Copy the numbered result and use it in documentation, instructions, code, or a list.

More about this tool

This tool adds numbers to text lines and helps you quickly prepare numbered lists, instructions, code fragments, and documentation. You can choose number format, start value, step, separator, and a custom template with {n}. Settings for empty lines and number width alignment are also available. The result updates automatically when the text or parameters change.

Runs in the browser
Data is not sent to the server
Supports different number formats
Includes start value, step, and separator
Can use a custom template
Useful for lists, instructions, and code
No registration required

Frequently Asked Questions

How do I add numbers to text lines?

Paste the text into the input field, choose a number format, and configure the start value and step if needed. The numbered result appears automatically.

Can numbering start from a value other than 1?

Yes. You can set the start value and step in settings, for example start at 5 and increase by 2.

What is a custom template?

A custom template lets you define your own number format with the {n} placeholder, for example "No.{n}: " or "[{n}] ".

What happens to empty lines?

By default, empty lines are kept in the result but do not receive a number. You can change this behavior in settings.

Can numbers be aligned by width?

Yes. The "Align numbers by width" option adds leading spaces so numbers line up neatly in a list or code block.

Is this useful for code and documentation?

Yes. It is convenient for instructions, step lists, documentation fragments, and multiline text.

Is my data sent to the server?

No. Text is processed locally in your browser and is not sent to the server.

Do I need to register?

No. The tool works immediately and does not require registration.

More about this tool

Runs in the browser
Data is not sent to the server
Supports different number formats
Includes start value, step, and separator
Can use a custom template
Useful for lists, instructions, and code
No registration required

Frequently Asked Questions

How do I add numbers to text lines?

Paste the text into the input field, choose a number format, and configure the start value and step if needed. The numbered result appears automatically.

Can numbering start from a value other than 1?

Yes. You can set the start value and step in settings, for example start at 5 and increase by 2.

What is a custom template?

A custom template lets you define your own number format with the {n} placeholder, for example "No.{n}: " or "[{n}] ".

What happens to empty lines?

By default, empty lines are kept in the result but do not receive a number. You can change this behavior in settings.

Can numbers be aligned by width?

Yes. The "Align numbers by width" option adds leading spaces so numbers line up neatly in a list or code block.

Is this useful for code and documentation?

Yes. It is convenient for instructions, step lists, documentation fragments, and multiline text.

Is my data sent to the server?

No. Text is processed locally in your browser and is not sent to the server.

Do I need to register?

No. The tool works immediately and does not require registration.