JustOpenFile – Preview files locally in the browser without uploading

Show HN: JustOpenFile – Preview files locally in the browser without uploading

JustOpenFile – Preview files locally in the browser without uploading is a business in show hn launch.

Profile

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 preview supported files inside them. The project was motivated by a simple problem: opening an unfamiliar file often requires installing an application or uploading potentially sensitive data to an online service. There is no account, installation, or upload required. https://justopenfile.com I’d appreciate feedback on file formats you would find useful and any compatibility or performance issues you encounter.

JustOpenFile – Preview files locally in the browser without uploading is positioned in show hn launch, a segment that rewards a clear, focused offering.

The company is listed at the Show HN launch stage of development.

Website: justopenfile.com/en