Text Add Line Number Tool

1. This tool can add line numbers to specified text.

2. If no line number format is specified, the default is numeric formatting, such as: 1 2 3.

3. When using numeric line numbers, you can set the sorting order, such as descending or ascending.

4. When using numeric line numbers, you can choose whether to add leading zeros to align the numbers.

5. When setting line numbers, you can filter out blank lines in the text.

6. If you set line numbers in a "number plus letter" format (e.g., u001, u002), you can use this tool to process the data multiple times.

6. This tool does not collect any of your processed data, so you can use it with confidence.