HOW CRACKERS CRACK GIFT CARDS?

What you will need:

Coding Knowledge

A company that has a website to check gift card balances (without pins)

Know the pattern/algorithm the company uses for their gift card numbers. (This can be done by examining multiple valid gift cards)

A DBC or 2Captcha account if the website uses captchas for authentication

Proxies

Basically what you will want to do is create a program/script that loads proxies, visits the web page of the gift card balance page, bruteforces a list of gift card numbers that you can generate with the algorithm/pattern of that gift card, check the balances of the cards, and writes the values to a file.

Generating card numbers is easy. For example SmashBurger gift cards numbers. The card numbers range from 87594000100000 to 87594000199999. So your combo should include every single number in between that range.

If the company has a captcha authentication step then you will want to use a service like DBC or 2Captcha and implement their function. They have guides on how to do that on their website