STLRepair - Fix STL mesh errors online with free basic repair

STLRepair is an online STL repair tool for makers and 3D printing users. Upload a binary or ASCII STL to preview the model and check open boundaries, non-manifold edges, and invalid triangles. Apply supported basic repairs locally in your browser and download the result without an account (free). Optional advanced repair is available for complex models: $3.99 one-time or Pro $12.99/month. Not an AI tool. Built by edmund (AstraOcean Ltd, UK).