Show HN: I Built a Free Site for Students to Test Their Knowledge on Their Notes (www.pdftoquiz.com)

PDFToQuiz is a new free Show HN project that automatically converts uploaded PDFs into interactive study quizzes in seconds. Students drag-and-drop notes or readings and the AI pipeline extracts key information and generates Multiple Choice, Fill‑in‑the‑Blank, and True/False questions, then provides instant scoring and feedback to highlight weak areas. The pitch is speed and convenience: replace hours of manual quiz authoring with a one‑click workflow tailored for exam prep. For the AI/ML community this is a practical application of automated question generation and information extraction: it likely combines document parsing (and OCR for scanned pages), key‑sentence or answer span selection, question‑generation models, and distractor/option creation plus automated scoring. The tool demonstrates how sequence‑to‑sequence / transformer QG approaches can be productized for active recall and formative assessment at scale. Key implications include educational impact (scaling personalized practice), research uses (rapid dataset/annotation generation), and risks to watch—model hallucinations or bad distractors, degraded performance on noisy PDFs, and privacy/copyright concerns when uploading proprietary course material. Overall, it’s a useful demonstration of applied NLP for edtech, but invites scrutiny on evaluation, accuracy, and data handling.