Free STL File Viewer Online
Preview STL files for 3D printing directly in your browser. Drag, drop, and inspect your 3D models before sending to the printer. No software installation required.
Drop STL file here
or click to browse
Binary or ASCII STL format (max 50MB)
Triangles
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Vertices
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Dimensions
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File Size
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Perfect for 3D Printing Workflow
Preview and inspect your STL files before sending to the 3D printer
Check Model Integrity
Verify your mesh is watertight and print-ready before slicing
View Dimensions
See exact model dimensions to ensure it fits your print bed
Inspect Details
Zoom in to check fine details and surface quality
Rotate & Examine
View from any angle to spot potential printing issues
Instant Loading
No waiting - preview appears immediately after upload
Completely Private
Files process in your browser, never uploaded to servers
About STL Files
STL (STereoLithography) is the standard file format for 3D printing. It represents 3D models as a collection of triangular facets, making it perfect for additive manufacturing.
Created by 3D Systems in 1987, STL files are supported by virtually all 3D printers and slicing software. The format comes in two varieties: binary (compact, smaller file size) and ASCII (human-readable text format).
Common Uses:
- • 3D printing and rapid prototyping
- • CAD (Computer-Aided Design) exports
- • Manufacturing and CNC machining
- • Medical imaging and dental applications
- • Product design and engineering
Frequently Asked Questions
What is an STL file?
STL (STereoLithography) is a 3D file format used for 3D printing. It describes the surface geometry of a 3D object using triangular facets. STL files contain no information about color, texture, or other model attributes.
Can I view both binary and ASCII STL files?
Yes! Our viewer supports both binary and ASCII STL formats. Binary STL files are smaller and load faster, while ASCII STL files are human-readable text.
Are my STL files uploaded anywhere?
No! All file processing happens locally in your browser using WebGL. Your STL files never leave your computer, ensuring complete privacy.
Can I convert photos to STL for 3D printing?
Yes! Our AI-powered image to 3D converter can turn product photos into 3D models, which you can then export as STL files ready for 3D printing.
What is the file size limit?
You can view STL files up to 50MB. Most 3D printing models are well under this limit. For larger files, consider optimizing them in CAD software first.
Does this viewer work on mobile devices?
Yes! The STL viewer works on modern mobile browsers. You can use touch gestures to rotate and zoom your 3D models.
Convert Photos to STL Files
Turn any product photo into a 3D model and export as STL for 3D printing. AI-powered conversion in seconds.