Data Integrity Check Testing Our Inventory Feed Reliability?

Hi everyone,

I am currently trying to help my child with a primary school project about how computers "speak" to each other, and it actually reminded me of my own business struggles!

We use large data feeds to sync our warehouse stock with our online store, and I need to ensure the system rejects malformed data instead of importing errors.

I’m looking for a way to break the structure of our feed files to see if the validation layers catch the problem. What is your go-to for creating corrupt XML files for data validation testing.

Thanks in advance.