TestFill is a free browser extension for Chrome that simplifies the process of inputting Stripe's test payment data. Designed specifically for developers and testers, it eliminates the need for manual entry by automatically filling in the required payment information, including test card numbers. This tool is compatible with multiple browsers, including Edge, Opera, and Brave, making it versatile for various testing environments.

The extension is lightweight and efficient, aimed at enhancing the testing experience when working in Stripe's test mode. With a proven track record, TestFill has been utilized by users for filling Stripe's test card data approximately 12 billion times, underscoring its reliability and effectiveness in facilitating smooth payment testing.