Duplicate a List

Repeat each line in your list multiple times using the Duplicate a List Tool. Customize how many times each item is duplicated. Output updates live with item count, plus export, import, and copy options included.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total items: 0
Options
Maximize output

How to Use:

  1. Paste your list into the Input List box or import a file.
  2. Set how many times to duplicate each item using the Number of times field.
  3. The duplicated list will appear instantly in the Duplicated List Output area.
  4. View the total number of items at the bottom.
  5. Use Copy Output or Export to File to save the results.
  6. Use Clear All to reset the tool.

What Duplicate a List Tool Can Do:

  • Repeats every line in your input a specified number of times
  • Maintains line-by-line formatting ideal for sorted output
  • Useful for generating mock data, filler entries, repeated forms
  • Includes live preview, copy, export, and file import

Example:

Input:

apple
banana
cherry

Repeat count: 3

Output:

apple
apple
apple
banana
banana
banana
cherry
cherry
cherry

Common Use Cases:

Great for test data generation, duplicating tasks, preparing form inputs, bulk filling lists, or expanding limited inputs for CSV files, spreadsheets, and batch workflows.

Useful Tools & Suggestions:

If you’re duplicating a list, Duplicate List Items lets you repeat each entry within the list itself great for testing layouts or creating patterns. After duplicating, you can use Trim List Items to clean up any spacing issues that show up in the process. It’s a quick way to generate test content or bulk up a dataset without manually copying each line.

Related Tools