If you are searching how to check Sephora gift card balance online, don't worry. You simply log in to your Sephora account and tap on your name from the top left corner of the page. You'll see a form page and then enter your Sephora card number and PIN on the back of the card. Visit any Sephora store and ask the cashier to check the Sephora balance for you or call 1-888-860-7897.