Here are the commonly recited duas for opening the fast during Ramadan:
Dua 1:
ذَهَبَ الظَّمَأُ وَابْتَلَّتِ الْعُرُوقُ وَثَبَتَ الأَجْرُ إِنْ شَاءَ اللَّهُ
Dhahaba al-zama’ wa abtalat al-‘urooq wa thabata al-ajr in sha Allaah
Thirst is gone, the veins are moistened and the reward is certain if Allaah wills.[4][1][4
Dua 2:
اللَّهُمَّ لَكَ صُمْتُ وَعَلَى رِزْقِكَ أَفْطَرْتُ
Allahumma laka sumtu wa ala rizq-ika-aftartu
O Allah For You I have fasted and upon your provision, I have broken my fast.[1][3][4
Alternative Version of Dua 2:
اللَّهُمَّ اِنِّى لَكَ صُمْتُ وَبِكَ امنْتُ وَعَليْكَ تَوَكّلتُ وَ عَلى رِزْقِكَ اَفْطَرْتُ
Allahumma inni laka sumtu wa bika aamantu wa alayka tawakkaltu wa ala rizq-ika-aftartu
O Allah, for You have I fasted and in You have I believed and upon You have I relied and with Your provision I have broken my fast.[2][3]