cloudflare

sveltekit

ai

rag

quiz

Quiz Generator

Live: https://quiz-generator.ericmaster.ninja

An AI-powered quiz app that turns uploaded documents into multiple-choice quizzes grounded in their content. Upload a PDF or text file, wait for it to process, pick a topic + difficulty, and get a set of MCQs you can save and revisit.

Stack

  • Frontend: SvelteKit 5 + Svelte 5, deployed via @sveltejs/adapter-cloudflare
  • Runtime: Cloudflare Workers (free tier — no Queues, ingest uses ctx.waitUntil)
  • Storage: D1 (SQLite with FTS5 virtual table for keyword search), R2 (raw document blobs)
  • Vectors: Cloudflare Vectorize (1024-dim cosine, @cf/baai/bge-m3 embeddings via Workers AI)
  • LLM: OpenRouter (multi-model, capped to top-3 selections)
  • Auth: Better Auth (email/password; OAuth-ready)

How it works

  1. Ingest — document uploaded to R2 + D1; background waitUntil job chunks it, generates embeddings via Workers AI, upserts vectors into Vectorize, and extracts topics via OpenRouter.
  2. Retrieval — hybrid search: Vectorize semantic ANN + D1 FTS5 keyword, fused with Reciprocal Rank Fusion (RRF).
  3. Generation — retrieved chunks + topic/difficulty prompt → OpenRouter → MCQs rendered in the UI.

Source

Private repo. Deployed to Cloudflare account 71f942c5… — D1 quiz-generator-db, R2 quiz-generator-docs, Vectorize index quiz-generator-chunks.