Free online DWG viewer
Open DWG files online, without the upload.
Caddis is a local-first DWG viewer for fast drawing review. Open a file in your browser, inspect layers, measure geometry, and add review markup while the source drawing stays on your device.
No account required for local viewing. Files stay on your device unless you opt into Cloud.What is a DWG file?
DWG is a common CAD drawing format used for 2D plans and technical drawings. Caddis lets you inspect a DWG without a desktop CAD seat, then keep your comments separate from the original drawing.
How to get started
- Open the Caddis web viewer.
- Choose a DWG file from your device.
- Review layers, measurements, and markup locally in the browser.
Built for practical review
- Open DWG drawings without a CAD license
- Measure, inspect layers, and add markup
- Keep the original source file unchanged
- Continue on iPhone or use optional cloud sharing
Your drawings stay under your control
Caddis is local-first: opening a supported file for local review does not require uploading it. If you choose Caddis Cloud, you can continue a project across devices or create a revocable, read-only link.
Frequently asked questions
Do I need an account to use Caddis?
No. You can open and review supported files locally without creating an account. An account is only needed for optional cloud features.
Are my CAD files uploaded?
Not for local viewing. Caddis processes supported files on your device. Cloud storage and share links are opt-in per project.
Can I use Caddis offline?
Local review is designed to work on your device. Cloud sync and share links naturally require an internet connection.
Which CAD formats can Caddis open?
Caddis supports DWG, DXF, STEP, STP, STL, OBJ, PLY, and IFC files in the web viewer.
Explore Caddis tools
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