Guides
Make sense of 3D files.
Clear guides to the 3D formats people actually run into: how to open an STL, the difference between GLB and glTF, what OBJ and PLY are for, and how to grab a screenshot. Each pairs with a free viewer that runs in your browser.
GLB vs glTF: What's the Difference?
Same format, two containers: GLB packs everything into one binary file, glTF is text that often links to others. When to use each.
Read guideHow to Take a Screenshot of a 3D Model
Frame the model, choose a background, and save a clean PNG of any 3D model straight from your browser.
Read guideHow to View an STL File (No Software Needed)
Open an STL in your browser with no CAD or slicer, rotate it, read its real size, and check it before printing.
Read guideHow to Prepare an STL for 3D Printing
A practical checklist, size, orientation, mesh integrity and wall thickness, for getting an STL ready to slice and print.
Read guideGLB, STL, OBJ & PLY: 3D File Formats Explained
What GLB, glTF, STL, OBJ and PLY are each for, and when you'll meet them, so you know which is which.
Read guideWhat Is an OBJ File (and How to Open One)
What an OBJ is, why it travels with an MTL file, and how to open one in your browser to inspect the mesh.
Read guideHow to Convert an OBJ to GLB
Why convert OBJ to GLB, what carries over from the MTL and textures, and how to confirm the result looks right.
Read guideHow to Reduce a 3D Model's File Size and Poly Count
Why 3D files balloon, how to cut size and polygon count sensibly, and how to read the triangle count to confirm it worked.
Read guideHow to Open a 3D Model on Your Phone
Open a GLB, STL, OBJ or PLY model on Android or iPhone with no app, rotate it with touch, and know what to watch for.
Read guideWhat Is a PLY File (and How to Open One)
What a PLY is, why scanners and photogrammetry use it, how it stores per-vertex colour, and how to open one.
Read guideBest 3D Format for Printing vs the Web
Why STL is right for 3D printing and GLB for the web, what each ignores, and how to avoid picking the wrong one.
Read guideHow to View a GLB File (No Software Needed)
Open a GLB in your browser with no software, rotate it, read its size and triangle count, and check the textures.
Read guideWhy Won't My 3D Model Open? Common Fixes
A model that won't open, loads blank or shows no colour usually has a simple cause. The common reasons and fixes.
Read guideSkip the reading, open a model
Drag a file into the viewer and inspect it. Free, no sign-up, nothing uploaded.
Open the 3D viewer