CAD file formats & notices

Last updated: August 25, 2026

This page describes how Draw2D actually reads and writes CAD files. It is a product notice, not legal advice. AutoCAD and DWG are trademarks of Autodesk, Inc. EverrCAD is not affiliated with, endorsed by, or sponsored by Autodesk.

What Draw2D supports

Format	Draw2D (web)	Draw2D 2026 (desktop)
.eve	Native save / open	Native save / open
DXF	Import and export, written by EverrCAD	Import and export, written by Draw2D
DWG	Import only. Decoded on EverrCAD servers with GNU LibreDWG. No DWG export.	Import and export. Converted with LibreDWG’s `dwg2dxf` and `dxf2dwg` as separate programs.
PDF / SVG	Export	As provided by the desktop app

Not every DWG or DXF entity, version, or third-party file will round-trip. Review converted drawings before using them in production.

GNU LibreDWG

DWG is a closed binary format. EverrCAD uses GNU LibreDWG (GPL-3.0-or-later) to decode and encode DWG. LibreDWG is not the Open Design Alliance (ODA) libraries, and it is not Autodesk software.

On the web

The browser app never ships LibreDWG. A signed-in user uploads a DWG; EverrCAD’s server runs LibreDWG (WASM build @mlightcad/libredwg-web) and returns a decoded drawing. The client then maps that into Draw2D the same way it maps DXF.
That server-side use does not place the closed-source web app under the GPL. GPLv3 has no network clause (the AGPL does). LibreDWG is not bundled into the website JavaScript.
The web app does not write DWG files.

On Draw2D 2026 (desktop)

Draw2D is proprietary. It does not link LibreDWG.
DWG import runs LibreDWG’s dwg2dxf as a separate process, then Draw2D reads the DXF.
DWG export writes DXF with Draw2D’s own writer, then runs LibreDWG’s dxf2dwg as a separate process.
Those converters ship unmodified with the installer. Licence texts (GPL-3.0, and Qt’s LGPL-3.0) travel in the app’s notices. Corresponding source for the LibreDWG version we ship is published with each Draw2D release as a source tarball on Draw2D releases, and from the LibreDWG project.

Other open-source software

Draw2D 2026 is built with Qt 6 under the LGPL-3.0, linked dynamically so those libraries can be replaced. Full third-party notices ship inside the desktop app as NOTICE.txt.

LibreDWG copyright: Free Software Foundation, Inc. and contributors. Qt copyright: The Qt Company Ltd and other contributors.

What we do not claim

We do not claim Autodesk, AutoCAD, or RealDWG compatibility.
We do not claim that every DWG feature LibreDWG cannot read will appear in Draw2D.
We do not sell Autodesk licences, and you do not need one to use Draw2D’s LibreDWG conversion.

These terms also appear in our Terms & Conditions.