How to create large dummy file in Windows Command-Line

Sometime you might need to create a dummy file for testing or other purpose. How can you create a file with the file size you want? For example, how can you create a 1GB file for your testing?

Windows have a command line utility called Fsutil that can help you to create the respective file size you want.

The following command create a dummy file called “test.txt” with 1 GB file size. Just copy and paste into your cmd.

fsutil file createnew test.txt 1000000000