Credit cards involve interest and thus are haram. Charging interest and paying interest are both haram.
> It was narrated that from 'Ata' bin As-Sa'ib, from Ash-Sha'bi who said:
The Messenger of Allah [SAW] cursed the one who consumes Riba, the one who pays it, the one who writes it down, and the one who withholds Sadaqah (Zakah). And he used to forbid wailing (in mourning for the dead).
Sunan an-Nasa'i 5105
It is still forbidden if that card has a introductory 0% APR or you intend to pay the balance in full because you are signing a contract which can required you to pay riba.
> It was narrated that from 'Ata' bin As-Sa'ib, from Ash-Sha'bi who said: The Messenger of Allah [SAW] cursed the one who consumes Riba, the one who pays it, the one who writes it down, and the one who withholds Sadaqah (Zakah). And he used to forbid wailing (in mourning for the dead).
Sunan an-Nasa'i 5105
It is still forbidden if that card has a introductory 0% APR or you intend to pay the balance in full because you are signing a contract which can required you to pay riba.
https://islamqa.info/en/answers/13725/using-credit-cards-is-...