Is it pique or peak interest?

Pique (not peak) is the correct spelling in the phrase “pique someone’s interest,” which means to “arouse someone’s interest.”

Pique your interest, pique my interest etc. examples
We hope this introduction has piqued your interest in the subject.

I read the first few chapters, but it didn’t really pique my interest.

Knowing whether to spell it “pique,” peak, or pique is tricky because these words are homophones (i.e. They have different meanings but are pronounced in the same way).

Have you tried QuillBot’s free Grammar Checker? It’s a great tool for avoiding mistakes with commonly confused words like these.