I need to show responsive PayPal checkout page to customers.
Link I'm using: https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_ap-payment&paykey=
What I'm getting: https://i.stack.imgur.com/PDlWy.png
I need to show mobile friendly responsive PayPal checkout page.
Thanks.
Your first link is an Adaptive Payments checkout. Adaptive Payments is a very old, deprecated PayPal product, and will not offer a responsive page.
To have a responsive page, switch to a normal PayPal checkout.
Here is a front-end that depends on calling a server for setting up a v2/order and capturing that v2/order via API: https://developer.paypal.com/demo/checkout/#/pattern/server (notice the calls to '/demo/...' placeholders, which must be replaced with actual routes on your server).
Here is a front-end that does not do that, and uses HTML/JavaScript only: https://developer.paypal.com/demo/checkout/#/pattern/client
