We built PDF Craft, an MIT-licensed PDF to EPUB/Markdown converter that handles the hard parts: scanned documents, LaTeX formulas, and complex layouts. Key features: Accurate OCR: Built on DeepSeek-OCR, works even with low-quality scans LaTeX formula support: Precise recognition of math equations and chemical formulas Smart layout preservation: Handles two-column formats and text-image layouts Local or cloud: Run free locally (needs RTX 3060+) or use our cloud service 4000+ GitHub stars: https://github.com/oomol-lab/pdf-craft