ChargeGuardian

Stop surprise charges, catch hidden subscriptions, and avoid free trial traps. Your last line of defense before you click pay.

Because an accidental click shouldn't cost you money. Get a quick confirmation before any purchase goes through. ChargeGuardian watches for checkout buttons across Amazon, eBay, Walmart, Shopify, and thousands of other stores — and pauses just long enough to ask: are you sure? How it Works: The moment you click "Place Order," "Buy Now," or any payment button, ChargeGuardian shows you a clean confirmation screen with your payment method detected from the page. One tap to confirm, one tap to cancel. That's it. Features: • Intercepts checkout buttons across major retailers and Shopify stores • Detects your payment method (card, PayPal, etc.) and displays it before the charge fires • Works on one-click checkouts, single-page app storefronts, and standard forms • Add trusted merchants to your whitelist — skip the prompt on sites you buy from regularly • Toggle protection on or off with one click from the toolbar • Runs entirely in your browser — no accounts, no servers, no data sent anywhere Why it Needs Access to All Sites: Checkout pages exist on thousands of different domains — there's no way to predict which site you'll shop on next. ChargeGuardian only activates when it detects a payment button on the current page, and never reads, stores, or transmits any of your personal or payment information. Privacy & Permissions: No accounts required. No data collection. No analytics. Everything stays on your device. ChargeGuardian uses Chrome's local storage only to remember your settings and trusted merchant list.