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Preview of Sandbox Pay

Sandbox Pay by David Nguyen

A browser extension for developers to quickly generate and auto-fill test card data when working with PayPal Sandbox and Stripe Test environments.

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About this extension
Features
PayPal Sandbox cards — Generate random valid test cards (Visa, Mastercard, Amex, Diners, Maestro, CUP, JCB) with Luhn-valid numbers
PayPal error triggers — One-click fill for PayPal-specific error codes (CCREJECT-REFUSED, CCREJECT-SF, etc.)
Stripe test cards — Full list of Stripe test cards categorized by Success, Decline, and 3DS
Auto-fill — Automatically fills card number, expiry, CVV, cardholder name, and country into payment forms
Context menu — Right-click on any input field to fill card data directly
Customizable settings — Set default country, cardholder name, and card background images
i18n — Supports English and Vietnamese
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Permissions and data

Required permissions:

  • Access your data for sites in the appspot.com domain
  • Access your data for sites in the paypal.com domain
  • Access your data for sites in the sandbox.paypal.com domain
  • Access your data for sites in the stripe.com domain
  • Access your data for 127.0.0.1
  • Access your data for localhost

Data collection:

  • The developer says this extension doesn't require data collection.
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More information
Version
1.0.0
Size
274.31 KB
Last updated
3 days ago (Apr 1, 2026)
Version History
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