A simple CAD viewer that opens all file types.
Open any CAD file instantly in your browser. View and edit STEP, STL, DWG, IGES, OBJ, GLB, and more without installing AutoCAD or any software. The fastest free online CAD viewer with light editing and conversion capabilities including STEP to STL converter.
Free online CAD viewer • All CAD formats supported • Light editing • No installation
The Best Free Online CAD File Viewer & Editor
Everything you need for CAD file viewing and light editing online, supporting all major CAD formats without software installation.
Drag & Drop CAD Files & Convert
Drop any CAD file (STEP, STL, DWG, IGES, OBJ, GLB, GLTF, FBX) and start viewing instantly. Convert STEP to STL, edit files, and export - works like AutoCAD online but completely free.
Lightning Fast CAD Viewing
First render in under 5 seconds. 60fps 3D CAD viewing performance on any device or browser.
No Software Installation
View CAD files directly in your web browser. No need to download AutoCAD or any other CAD software.
Dark Mode Support
Switch between light and dark themes in the CAD viewer for comfortable viewing during long design sessions.
Light Editing Tools
Transform, rotate, and scale your CAD models with intuitive editing tools built right into the viewer.
Secure & Private
Your CAD files are processed securely with automatic deletion after viewing. No data is stored permanently.
Supported CAD File Formats
Open and view popular CAD file formats instantly in your browser
All CAD Formats
STEP, STL, DWG, IGES, OBJ, GLB, GLTF, FBX, and more. Universal support for any CAD file format.
Light Editing
Transform, scale, rotate, and make basic modifications to your CAD models directly in the browser.
Browser-Based
Works entirely in your browser. No AutoCAD, no downloads, no subscriptions required.
Free Online STEP to STL Converter
Convert STEP to STL files instantly in your browser - no software installation required
How to Convert STEP to STL Online
Upload Your STEP File
Drag and drop your .step or .stp file into the viewer
View & Edit (Optional)
Preview your 3D model and make any necessary adjustments
Download as STL
Export your converted STL file ready for 3D printing
✨ Why Convert STEP to STL?
- • STL files are perfect for 3D printing
- • Smaller file sizes for easier sharing
- • Universal compatibility with 3D printers
- • Mesh format ideal for manufacturing
🚀 Instant Conversion
Our online STEP to STL converter processes files in seconds, not minutes
🔒 Secure Processing
Files are processed securely and automatically deleted after conversion
💰 Free STEP to STL Converter
No subscription required - convert STEP to STL online free with our starter plan
🌐 No Software Download
Works entirely in your browser - no need to download STEP to STL converter software
Stop installing gigabytes of CAD software just to view one file
CADDaddy is the free alternative to expensive CAD software like AutoCAD online. Perfect for engineers, game artists, and educators who need quick online CAD file viewing without the hassle.
Before CADDaddy
"Ugh, I need to install 3GB of AutoCAD just to view this one CAD file..."
After CADDaddy
"Drag, view, done! Free online CAD viewing that's stupidly simple and exactly what I needed."
Why Choose CADDaddy for Online CAD Viewing?
Free Alternative to AutoCAD Online
CADDaddy provides free online CAD file viewing without the cost of AutoCAD subscriptions. View STEP, STL, DWG, and IGES files instantly in your web browser.
Perfect for Engineers & Designers
Whether you're a mechanical engineer reviewing designs on the go, a game developer checking 3D assets, or an educator sharing CAD files with students, CADDaddy makes online CAD viewing simple.
Web-Based CAD Viewer
No downloads, no installations, no subscriptions. Just open your browser and start viewing CAD files online immediately.
📁 Multiple File Formats
STEP, STL, DWG, and more coming soon
⚡ Instant Loading
View CAD files in under 5 seconds
🌐 Browser Compatible
Works on Chrome, Firefox, Safari, Edge
💰 Free Tier Available
Start with our generous free tier, upgrade when you need more
🌙 Dark Mode Support
Built-in dark mode for comfortable viewing during long CAD sessions
Simple, Value-Based Pricing
Start free, scale as you grow, with transparent pricing for CAD file processing.
Starter
- 5 file views per month
- All CAD formats (STEP, STL, DWG)
- Basic viewing tools
- Community support
Professional
- 50 files included monthly
- $0.50 per additional file
- Advanced editing tools
- Export to multiple formats
- Priority support
Enterprise
- Unlimited file processing
- Team collaboration tools
- API access
- Custom integrations
- Dedicated account manager
All plans include secure file handling and privacy protection. No long-term contracts.
Start Viewing CAD Files Online for Free
Join thousands of engineers, designers, and educators using CADDaddy as their go-to free online CAD viewer.