CAD Viewer · Local drawing processing

Measure CAD drawings from real geometry

Measure distance, area and angles using points in the drawing coordinate system. Snapping helps choose real geometric points. Results depend on the source drawing, declared units and the points you choose.

Open the viewer

Pick points and check units

Choose the appropriate measurement tool, then select points on the source geometry. Confirm drawing units before interpreting the result as a physical length or area. A view zoom factor is not a print scale. Recheck critical measurements in professional CAD software.

What stays on your device

Open Drawing reads your selected file using local JavaScript and WebAssembly. The viewer has no drawing-upload or cloud-storage endpoint. It fetches its own code, fonts, parser assets and optional public samples. Source restoration, saved reviews and measurements use browser storage. Clear local data in Settings or clear the browser’s site data after exporting anything you need, especially on a shared device.

Compatibility and limitations

Support varies by file version and entity. Splines, leaders, external references, proxy or dynamic entities and engineering fonts may differ or be missing. The current release does not write DWG and does not claim complete AutoCAD compatibility. DXF, PDF and images can differ from the source. Independently verify engineering-critical dimensions and deliverables.

How to use it

Open the viewer and choose Open Drawing to select a DWG or DXF file on this device.
Read any parser or missing-font notices and choose the required layer or layout.
Use the guide’s viewing, measurement, review or export tool and check the result against the source.
Export what you need. Review data is separate from the original file; save supported DXF edits before refreshing.

Questions and answers

Is my drawing uploaded?

The current application parses selected drawings locally and provides no drawing-upload endpoint. Browser requests still retrieve application assets and any public sample you choose.

Can it save a DWG file?

No. DWG writeback is currently unavailable. Supported DXF export, PDF and image output are available subject to the source drawing and the tool’s limitations.

Does opening a file prove full compatibility?

No. Detection, parsing and faithful display are different checks. Inspect fonts, references, entities and layouts, and verify important results in suitable professional CAD software.

Will saved records follow me to another domain?

No. IndexedDB and localStorage are scoped to the browser origin. Export and transfer the required review data before moving to another device, browser or origin.