Caddis CAD REVIEW

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.

Open the free viewerDownload on the App Store
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.

Caddis on iPhone measuring a 7.7-foot stair run in a DWG floor planMeasure a stair run on site

Field-review workflow

From drawing to clear feedback.

  1. 01Open the Caddis web viewer.
  2. 02Choose a DWG file from your device.
  3. 03Review layers, measurements, and markup locally in the browser.

Built for practical review

Open DWG drawings without a CAD licenseMeasure, inspect layers, and add markupKeep the original source file unchangedContinue 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 opens supported geometry from DWG, ASCII DXF, STL, OBJ, PLY, STEP/STP, and IFC files. DWG, STEP/STP, and IFC compatibility is limited by source version and geometry type; unsupported geometry is reported rather than silently replaced.

Explore Caddis tools

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