In comments translated by the Malaysia Star, the 28-year-old added: "I hope everyone will pray that I will be steadfast and committed in my new journey.
"Only Allah can repay all those who prayed for my new life."
Yeap's modelling career took off two years ago after a stint at the Playboy Club Sands in Macau. She had previously worked as a kindergarten teacher.
The Rakyat Post translates a blog by Yeap in which she talks about her conversion. She wrote:
"I went to Catholic Church every Sunday evening for two years. I've tried to understand Christianity.
"I've tried to find new meaning in worshipping Kuan Yin and others. I also tried to adopt Buddhist practices.
"But my heart never felt close to God. My heart never felt touched.
"Today is a historic date for me. It's like a rebirth.
"Incidentally, this year, my birthday falls on the 5th of Ramadan.
"I'm more excited to know that this date falls on a Thursday, the Prophet Muhammad's favourite day."