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Description
Detects checkout pages and shows which of your Canadian credit cards earns the most on that purchase. Nothing leaves your browser. You're probably using the wrong card. Butter is a free extension for Canadians that answers one question at every online checkout: which of MY cards earns the most on THIS purchase? HOW IT WORKS • Tell Butter which cards you carry — by name only, never numbers. • Shop normally. When Butter detects a checkout page, a small widget appears. • It reads the order total locally and ranks your cards by real earn rates: category bonuses, caps, foreign-transaction fees, point values. PRIVATE BY DESIGN Everything happens inside your browser. Butter makes zero network requests — no page content, no purchase history, no card numbers ever leave your machine. Your wallet is just a list of card names in Chrome's own synced storage. HONEST BY DESIGN Butter's recommendations are commission-blind: the ranking engine has no access to affiliate data. The best card for you wins, every time — verified earn rates across 79 Canadian credit cards, maintained against issuer sources. ALSO FROM BUTTER Upload a bank statement at buttercard.ca to find the single best card for your real yearly spending.