Go to Billing and click Upgrade to Pro. You'll be taken to the Stripe checkout page where you can enter your payment details and complete the purchase.
Monthly vs annual
You can choose between monthly and annual billing at checkout. Annual works out cheaper — the exact saving is shown on the Pricing page. You can switch between billing cycles later through the customer portal.
What happens after you pay
Your account upgrades immediately once the payment goes through. You're redirected back to the billing page with a confirmation. Custom domains unlock, usage limits increase, and you can start creating aliases on your own domain straight away.
If the billing page doesn't reflect your new plan right away, hit the Sync button — it pulls the latest status from Stripe. A page refresh also works.
Payment methods
Stripe accepts most major credit and debit cards. Depending on your country, other payment methods may be available at checkout.
If the payment fails
Stripe will show an error at checkout with a reason — usually a declined card or incorrect details. Try a different card or contact your bank if it keeps failing.
If a payment fails after your subscription is already active (renewal failure), you'll see a warning banner on the billing page with a link to update your payment method.