Fast STL Viewer

Inspect, measure, and analyze STL files on your Android device. Used by engineers, dental technicians, medical professionals, educators, and quality control teams worldwide. Over 1 million downloads.

PROFESSIONAL TOOLS

Volume and surface area measurement with unit selector (mm, cm, in). Slice view with adjustable X, Y, and Z cross-section sliders to inspect internal geometry. Custom color settings for front and back faces. Remove all ads with a Pro subscription.

CORE FEATURES

- Load multiple STL files simultaneously for side-by-side comparison

- 4 rendering modes: shaded, wireframe, combined, and point cloud

- 6 standard views: top, bottom, left, right, front, back

- Automatic part detection — find and color-code separate components

- Boundary detection — identify open edges and mesh issues

- Orthographic projection for precise inspection

- Open STL files from email, Google Drive, Dropbox, or any file manager

- Save and export models

BUILT FOR PERFORMANCE

Powered by OpenGL ES 3.2 and native C++ mesh processing. Handles large STL files with millions of triangles. Supports both binary and ASCII formats.

Whether you are checking a dental crown, inspecting an engineering bracket, reviewing a medical implant, or teaching a CAD course — Fast STL Viewer gives you professional inspection tools in your pocket.