DWG is AutoCAD’s native 2D/3D drawing format. Created and opened by Autodesk AutoCAD. DWG is AutoCAD’s native format; AutoCAD launched in 1982 and made desktop CAD mainstream. DWG is a proprietary binary format with no official public specification, which spurred the Open Design Alliance to reverse-engineer it from 1998. Autodesk later added TrustedDWG technology so AutoCAD can warn when a file was last saved by non-Autodesk software.

How do I open a .DWG file?

Drop a .DWG file onto Analyser at https://lab.valjdakosta.com/ and it opens directly in your browser - no upload, no account and no software to install. Render 2D vector diagrams and CAD drawings to a preview: draw.io / diagrams.net (DRAWIO) files - decoding the mxGraph model, inline or compressed - AutoCAD DXF drawings (parsing the ASCII ENTITIES section), and binary AutoCAD DWG/DWT drawings, parsed by LibreDWG (WebAssembly) into their entities and rendered to an SVG, with an entity and layer breakdown.

Can I open a .DWG file online for free?

Yes. Analyser is a free online .DWG opener and viewer that runs entirely in your browser - your .DWG file never leaves your device, so there is nothing to upload and no software to install. It even works offline once installed.

.DWG file - what it is and how to open it online

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What is a .DWG file?

DWG is AutoCAD’s native 2D/3D drawing format. Created and opened by Autodesk AutoCAD.

Did you know: DWG is AutoCAD’s native format; AutoCAD launched in 1982 and made desktop CAD mainstream.
DWG is a proprietary binary format with no official public specification, which spurred the Open Design Alliance to reverse-engineer it from 1998.
Autodesk later added TrustedDWG technology so AutoCAD can warn when a file was last saved by non-Autodesk software.
What Analyser shows you: Render 2D vector diagrams and CAD drawings to a preview: draw.io / diagrams.net (DRAWIO) files - decoding the mxGraph model, inline or compressed - AutoCAD DXF drawings (parsing the ASCII ENTITIES section), and binary AutoCAD DWG/DWT drawings, parsed by LibreDWG (WebAssembly) into their entities and rendered to an SVG, with an entity and layer breakdown.
Open a .DWG file: Drag a .DWG file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.
Related formats: .DRAWIO · .DXF · .DWT. See all supported file types.