Local-first desktop organizer for your .stl · .obj · .3mf libraries.
Scan folders, generate thumbnails, search fast, and inspect models — without sending your files to the cloud.
Point Polytray at your folders; it indexes everything into a local database and keeps it fresh with file watching. Search and filter thousands of models instantly.
Background thumbnail generation for STL, OBJ, and 3MF — browse your library visually instead of guessing from filenames.
Inspect any model in an orbiting 3D viewer, see real dimensions, and compare two models side by side.
Tag files (in batches too) and group models into virtual collections — independent of where they live on disk.
Look inside .zip archives, preview the models in them, and act on them without extracting anything first.
Your files never leave your machine. No uploads, no account, no subscription — just a desktop app and your folders.
Cloud model managers want your STL collection on their servers — uploads, accounts, subscriptions, and your designs in someone else's hands.
Polytray indexes your existing folders in place. It works offline, it's as fast as your disk, and your library stays exactly where it is. Delete the app and nothing is lost or held hostage.