Enables studying for the ENEM exam using official 2009–2023 questions, with search by topic, discipline, and year, answer keys, randomized practice, PDF exam generation with explanations, and correction with performance tracking.

26 tools: web pages to Markdown, metadata, tech stack, SSL, SEO, domains, email auth and SSO checks.

Exact local utils: QR, hashing/encoding, JSON Schema, cron, markdown, diff, units, JWT, random.