As an e-commerce platform built on top of Stripe, we use Stripe test cards all the time.Unfortunately Stripe s own resource for copying card details is in a docs format. Very dense, hard to scan and quickly get the test card you re looking for.We experimented with Chrome extensions that autofill test card numbers, but they proved to be unreliable in nested iframes (which is usually how Stripe card fields are rendered).So instead, we made a simple, searchable directory that lets you easily copy the test cards you need to test specific payment flows and error handling.