STL Viewer & 3D Print Cost Calculator | The Spool List

Open STL, OBJ, 3MF & PLY files in Chrome. Measure size & volume, check the mesh and estimate 3D printing cost.

STL Viewer & 3D Print Cost Calculator: open 3D files right in Chrome. View STL files online without installing desktop software or uploading anything. Drag and drop an STL, OBJ, 3MF or PLY file into Chrome to rotate, zoom and inspect your 3D model. You can check that the mesh is watertight, measure its size and volume, and estimate how much it will cost to 3D print. ★ 3D MODEL VIEWER • Open STL (binary and ASCII), OBJ, 3MF and PLY files • Drag and drop, use the file picker, or paste a link to an .stl file • Right-click any .stl, .obj, .3mf or .ply link on a web page and choose "Open in STL Viewer" to preview a model before you download it • Rotate, pan and zoom, reset the view, wireframe mode, build plate grid, custom model colour • Save a PNG snapshot of your model ★ MESH CHECK & MEASUREMENTS • Dimensions (X × Y × Z) in mm, with file units (mm, cm, inch) and scale % • Volume (cm³), surface area (cm²) and triangle count • Watertight check that finds open edges and non-manifold edges before you send the file to your slicer ★ 3D PRINT COST CALCULATOR • Choose from common filaments or resin • Set your filament price per kg, infill % and quantity • Get material weight in grams, filament length in metres (1.75 mm) and material cost in your currency • Remembers your settings ★ PRIVATE BY DESIGN • Your files are processed locally in your browser and never uploaded • Works offline • No account, no ads, no tracking • Only asks for access to a website when you choose to open a model from that site ★ NO 3D PRINTER? GET IT MADE No printer, or the part is too big for yours? Post it as a job on The Spool List, a marketplace that connects buyers with makers who own 3D printers, CNC machines and laser cutters. It's free for buyers, and payments are escrow-protected. If you own a printer, you can earn money printing for others. On MakerWorld, Printables and Thingiverse model pages, a small "No printer? Get this made" card lets you post that model as a job in one click. You can hide it on any site or turn it off in the extension's options. Made by The Spool List: thespoollist.com