Teachers search for a PDF to Google Form converter because they have a chapter, a handout, or a policy document, and they want a graded quiz in the tool their school already uses. Google Forms is a good place to deliver and grade a quiz. It is a terrible place to write one. There is no field where you hand it a document and get questions back, and the Import questions button many people find first is only a way to copy items out of another Form.
So the work splits cleanly. This tool does the writing: it reads the PDF, finds the facts and concepts worth testing, phrases them as questions, and builds plausible wrong answers for the multiple choice items so the quiz can actually tell apart students who read the material from students who guessed. Google Forms does the delivery: quiz mode, automatic scoring, per-student results, and a spreadsheet of responses you can sort.
Once you see it as two jobs instead of one broken feature, the workflow stops being frustrating. You upload a chapter, review a draft of fifteen questions, fix the two that read oddly, and spend five minutes moving them into a Form. Compare that with writing fifteen items from scratch on a Sunday evening. The same approach works for any source document, which is why this sits alongside our core PDF to quiz converter and the Google Classroom quiz maker for teachers who assign through Classroom.