What is my3dlibrary?

My3DLibrary is a free Windows app that organizes your collection of 3D printing model files, the STL files people use for 3D printers, into a browsable library similar to how Plex organizes movies and shows. It requires no installation. You download it, unzip it, and double click the program, and it can even run directly from a USB drive without administrator permissions. Once running, it opens a page in your web browser where you point it at the folders on your computer that hold your model files, and it scans them to build your library automatically. From there you can browse your models by collection and category with thumbnail previews, search by name or tag, and open any model in a built in 3D viewer to look at it from every angle before printing. If you keep your files on Google Drive, you can install Google Drive for Desktop so it appears as a regular drive letter on your computer, then add that as a folder like any other, with no extra setup needed. One optional feature is automatic tagging of your models using AI that looks at each model's thumbnail image and guesses helpful labels for it. You can run this free using a local AI tool called Ollama with a vision model, or use a paid, faster option through OpenAI for a small per model cost, or connect to another local AI server called LM Studio. None of this tagging is required. Browsing and viewing models works fine without it, and none of your files or thumbnails are ever sent anywhere unless you specifically choose the paid OpenAI option. The app is built with a web based frontend using React and Tailwind, and a Node.js backend that stores your library information in a small local SQLite database file. The 3D viewer uses the Three.js graphics library. If you want to build the project from source rather than downloading the ready made release, you need Node.js and the pnpm package manager, then you install dependencies and run a couple of build commands to produce your own copy of the app. The project is released under the MIT license and was created by a hobbyist described as a dad who turned an interest in 3D printing into a full blown obsession. Bug reports, feature requests, and pull requests are welcome, and there is a small support link for anyone who wants to buy the creator a coffee.