Hi HN, I built JustOpenFile, a browser-based file viewer that processes files locally without uploading them to a server. It supports PDF, DOCX, Excel, CSV, JSON, Markdown, EPUB, ZIP, SQLite, images, audio, video, fonts, and 3D formats such as STL, GLB, and OBJ. ZIP archives can also prev...
Source: [Hacker News](https://justopenfile.com/en)