Welcome to the official documentation for stl.viewer.abctool.info. Our online tool is optimized to render, inspect, and analyze 3D STL (Stereolithography) models directly inside your web browser without installing additional software.

Format Specification

The viewer specializes in handling the 3D industry-standard STL mesh geometry format in both text (ASCII) and binary encodings.

Format Name	Extension	Encoding Type	Import	Export	Parser Engine
Stereolithography (Binary)	.stl	binary	✓	✓	Native High-Performance Parser
Stereolithography (ASCII)	.stl	text	✓	✓	Native High-Performance Parser

How to Open STL Models

We provide versatile methods for viewing 3D models from local storage or remote web sources.

Privacy & Client-Side Safety: When you open a local file, all mesh parsing and 3D rendering take place strictly inside your browser environment. Your files are never transferred to external servers.

Opening Local Files

You can load STL files from your computer or mobile device using either of the following approaches:

1. Click the File Open icon () located on the main toolbar to select one or multiple .stl files.
2. Drag and drop your .stl file, folder, or a compressed archive containing models directly into the browser viewport.

Opening Remote Models via URL

To view a model hosted on a remote web server, click the Open URL icon () on the toolbar and enter the target direct URL link.

Note: The hosting web server must have CORS (Cross-Origin Resource Sharing) headers enabled to allow web fetching from stl.viewer.abctool.info.

Loading Models from GitHub

To render an STL file hosted in a GitHub repository:

1. Navigate to the file on GitHub and copy the URL from your browser's address bar.
2. Open stl.viewer.abctool.info and select the Open URL icon ().
3. Paste the copied URL into the dialog input and click Confirm.

Loading Models from Dropbox

To view an STL file stored on Dropbox:

1. Generate a public share link for your .stl file on Dropbox.
2. Visit stl.viewer.abctool.info and click the Open URL icon ().
3. Paste the link into the input prompt to load the model.

Exporting Models

You can convert or save your current 3D viewport model by clicking the Export icon () on the toolbar, selecting your desired target configuration, and downloading the output file.

Sharing & Embedding

Models loaded via public web URLs can be easily shared or embedded into your own site. Click the Share icon () on the toolbar to generate a direct shareable URL or copy an <iframe> HTML embed code snippet.

Viewport & Display Preferences

Customize the 3D scene rendering and visual aesthetics via the Settings panel () on the right sidebar:

• Background Color: Modify the viewport background shade for viewing and snapshot generation.
• Show Edges & Threshold Angle: Toggle mesh wireframe outlines and adjust crease angle thresholds to highlight geometric edges.
• Default Fill Color: STL files store geometry without inherent color parameters. Use this setting to apply custom shading tones across the model surfaces.
• Dark Mode: Seamlessly toggle between dark and light UI themes.

Cookie Information

For details regarding stored user preferences, please refer to our Cookies Policy page.