ipynb.app is a browser‑based platform that converts Jupyter Notebook files into multiple formats, including PDF, Word (DOC/DOCX), HTML, PNG, and JPG. Everything runs online, with no installation, account creation, or registration required. Users can upload notebooks through a simple drag‑and‑drop interface, and batch processing makes it easy to convert several IPYNB files at once. The platform handles notebooks containing code, markdown, and output cells, and it supports large files without imposing size limits or conversion limits.