STL Analyzer
Upload STL to instantly view vertex count, physical size, volume, and watertight status — all in the browser.
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About This Tool
STL is the most common 3D printing format. This tool analyzes STL files for vertex/face counts, physical dimensions in mm, solid volume, surface area, and watertight status. Essential for checking STL quality before slicing and printing.
Tips
- 1STL has no color or texture data — analysis focuses on geometry only
- 2Check watertight status before printing to avoid slicing errors
- 3Binary STL loads faster than ASCII STL of the same model
Format Information
Input format
- Extension:
- stl
- Full Name:
- Stereolithography
- Type:
- 3D Mesh
- Format:
- STL (Binary / ASCII)
- Tools:
- Cura、PrusaSlicer、Chitubox、Simplify3D
- Open With:
- Slicer Software、MeshLab、Windows 3D Viewer、STL Viewer Online
- Description:
- STL is the most widely supported 3D printing format, storing triangle mesh only. It works with virtually all slicers and printers, the universal choice.
Notes:
- Does not support colors, textures or materials
- No unit definition — verify scale in your slicer
- ASCII format is 4-6× larger than binary
Supported Features:
- Triangle mesh only — simple and universally compatible
- Binary and ASCII encoding options
- Directly importable into Cura, PrusaSlicer, Chitubox, etc.
How to Use
Upload a model
Drop STL, GLB, OBJ, FBX and other formats
Review the panel
Expand collapsible sections for metrics
Copy or preview animation
Copy the report, or click clips to play in the preview
Frequently Asked Questions
About this tool
What metrics can I get from an STL analysis?
File size, vertex/face counts, bounding box dimensions, volume, surface area, and watertight status. All metrics are computed locally in your browser.
Why does STL analysis matter for 3D printing?
STL is the standard format for 3D printing. Checking dimensions, volume, and watertight status before slicing ensures the model is printable and correctly sized.
Can I analyze large STL files?
Yes, but very large files may take longer to process. All analysis is done locally — no file size limits besides browser memory.
Does STL analysis work with ASCII STL files?
Yes. Both binary and ASCII STL formats are supported. ASCII STL files are larger but human-readable.
General questions
Is Any3D completely free?
Yes, Any3D's core features are free to use forever. We provide format conversion, model optimization, and online preview at no cost, with no registration required.
Are my files uploaded to your servers?
No. Files you select are processed only in your browser on this device—they never leave your device and are never sent to our servers. We don't store any user files; after processing, related data in browser memory is released.
Do I need to install software?
No installation required. Any3D is entirely browser-based—just open the webpage to use all features. It works on Windows, Mac, Linux, and other major operating systems.
Is there a file size limit?
The processing capacity depends on your device performance and the model's vertex count and texture complexity, rather than file size alone. We impose no file size limit, but when a model exceeds what your device can handle, the page may lag or even crash.