Online CAD File Viewer
View CAD files online without software installation with Vega3D.
How to View a CAD File Online
Open and inspect any CAD file in three simple steps no software install and no signup needed.
Upload Your CAD File
Pick your file format, then drag and drop your model or click to browse. Supports STEP, STP, IGES, STL, DXF and PLT files up to 50MB.
View & Interact
Your file is processed right in the browser. Orbit, pan and zoom with your mouse or touch to examine it from any angle.
Inspect Every Detail
Switch to wireframe, toggle the reference grid, reset the view, and check the vertex and face counts in the model info panel.
Why Use the Vega3D CAD Viewer
A fast, private and free way to open CAD files right in your browser.
Your Files Stay Private
CAD files are processed locally in your browser and never uploaded to a server, so confidential designs never leave your device.
No CAD Software Needed
Open CAD files without installing SolidWorks, AutoCAD or Fusion 360, and without using up a license seat.
Completely Free
View as many CAD files as you want, as often as you want. No account, no watermark and no hidden limits.
Works on Any Device
Runs on Windows, Mac, Linux and even phones and tablets, right in the browser with full touch controls.
Wireframe & Model Info
Switch to wireframe to reveal the underlying structure, and check vertex and face counts in the built-in info panel.
6 CAD Formats in One Place
Open STEP, STP, IGES, STL, DXF and PLT files all in the same viewer, with no need to convert them first.
Supported CAD File Formats
Open the most common CAD file types in one viewer. Tap any format to open its dedicated viewer.
STEP Viewer
The ISO standard for exchanging 3D CAD models between systems. Stores precise solid geometry rather than a triangle mesh.
STP Viewer
The same STEP standard saved with the shorter .stp extension. Common output from SolidWorks, Fusion 360, CATIA and Inventor.
IGES Viewer
A long-standing neutral CAD format for surfaces and curves, still widely used to move data between older CAD systems.
STL Viewer
A triangle mesh format used for 3D printing and rapid prototyping. Stores surface geometry only, with no units or color.
DXF Viewer
Autodesk’s drawing interchange format for 2D drawings and layouts, holding lines, arcs, circles, polylines and splines.
PLT Viewer
A vector plotter format (HPGL) containing pen movement paths, used by plotters, vinyl cutters and engraving machines.
Use Cases of the CAD Viewer
Discover how the Vega3D CAD viewer helps engineers, machinists and designers open and check CAD files right in the browser.
Engineering Design Review
Open parts and assemblies to review geometry with colleagues without needing a CAD seat.
Supplier & Client Files
Check the CAD file a supplier or client sent before importing it into your own software.
Manufacturing & Quoting
Inspect parts quickly for quoting, machining or fabrication without opening full CAD software.
Cutting & Laser Profiles
Preview DXF and PLT cutting paths before sending them to a laser cutter, router or plotter.
3D Printing Prep
Review a CAD model or STL before converting and slicing it for print.
Education & Training
Explore CAD files in class to learn mechanical design, drafting and data exchange.
Frequently Asked QuestionsFrequently
Asked
Questions
The online CAD viewer opens STEP, STP, IGES, STL, DXF and PLT (HPGL) files. Pick the matching format before you upload and your file loads straight away.
No. Everything runs in your browser. STEP and IGES files are read by an OpenCascade CAD engine compiled to WebAssembly, so no CAD license is required.
No account is required. The CAD viewer is completely free to use with no signup, no login and no watermark.
No. Your files are processed locally inside your browser, so they never leave your device. That matters when your designs are confidential.
You can view CAD files up to 50MB. For very large or highly detailed files, close other browser tabs to free up memory for the smoothest performance.
The first STEP or IGES file initializes the CAD engine in your browser. Once it is ready, later files load noticeably faster.
Yes. The model info panel shows vertex and face counts, and you can switch to wireframe to inspect the underlying structure.
The CAD viewer is for viewing and inspecting only. If you need to change formats, use the Vega3D 3D Converter.
Left-click and drag to rotate, right-click and drag to pan, and scroll to zoom. On-screen controls let you reset the camera, zoom, and toggle the grid and wireframe.
Yes. Because it runs in the browser, you can open and rotate CAD files on a phone or tablet using touch gestures, no app required.
