3D Model Converter vs Convertpoly

3D Model Converter is a web tool for viewing and converting mesh files between modeling, CAD, 3D-printing, and web workflows. It lists STL, OBJ, PLY, 3MF, FBX, GLB, glTF, STEP, and IGES support. STL, OBJ, PLY, GLB, and glTF files can be parsed locally in the browser without sending them to the server, while STEP and IGES use a cloud conversion route after a verified upload begins. The main local model file limit is 100 MB, and large dependency packages can meet browser memory limits. OBJ and glTF workflows may require accompanying MTL, BIN, and image files. After export, the tool reopens the result and rejects files that cannot be parsed or contain no renderable triangles. Reports compare available dimensions, triangles, objects, materials, textures, units, and axis data. The Free plan costs nothing and includes unlimited local workflows, five cloud credits monthly, 24-hour cloud history, and a 50 MB cloud-file limit. Pro costs $9.90 a month and adds 100 cloud credits, 30-day history, priority queue, and batches of up to 20 files.

Convertpoly has no write-up on Specifiction yet; its figures are above.