.dwg

File format family DWG June 2019 October 2012 DWG .dwg file icon.svg .dwg (plain).dws (standards).dwt (template) on on image/vnd.dwgMedia Types https://www.iana.org/assignments/media-types/media-types.xhtml 2022-05-06 www.iana.org October 18, 2017 https://web.archive.org/web/20171018191839/http://www.iana.org/assignments/media-types/media-types.xhtml live Computer-aided design Autodesk, Open Design Alliance and others 1982What's up with DWG adoption in free software? January 26, 2012 https://librearts.org/2012/01/whats-up-with-dwg-adoption-in-free-software/ Libre Arts February 4, 2025 Open but ProprietaryGuides to Good Practice: Cad_3-2 http://guides.archaeologydataservice.ac.uk/g2gp/Cad_3-2 Archaeology Data Service April 15, 2015 December 14, 2011 https://web.archive.org/web/20111214074455/http://guides.archaeologydataservice.ac.uk/g2gp/Cad_3-2 live DWG (from drawing) is a proprietary binary file format used for storing two- and three-dimensional design data and metadata. It is the native format for several CAD packages including DraftSight, AutoCAD, ZWCAD, IntelliCAD (and its variants), Caddie and Open Design Alliance compliant applications. In addition, DWG is supported non-natively by many other CAD applications. The .bak (drawing backup), .dws (drawing standards), .dwt (drawing template) and .sv$ (temporary automatic save) files are also DWG files. Version history Version Internal version AutoCAD versions DWG R1.0 MC0.0 AutoCAD Release 1.0 DWG R1.2 AC1.2 AutoCAD Release 1.2 DWG R1.40 AC1.40 AutoCAD Release 1.40 DWG R2.05 AC1.50 AutoCAD Release 2.05 DWG R2.10 AC2.10 AutoCAD Release 2.10 DWG R2.21 AC2.21 AutoCAD Release 2.21 DWG R2.22 AC1001, AC2.22 AutoCAD Release 2.22 DWG R2.50 AC1002 AutoCAD Release 2.50 DWG R2.60 AC1003 AutoCAD Release 2.60 DWG R9 AC1004 AutoCAD Release 9 DWG R10 AC1006 AutoCAD Release 10 DWG R11/12 AC1009 AutoCAD Release 11, AutoCAD Release 12 DWG R13 AC1012 AutoCAD Release 13 DWG R14 AC1014 AutoCAD Release 14 DWG 2000 AC1015 AutoCAD 2000, AutoCAD 2000i, AutoCAD 2002 DWG 2004 AC1018 AutoCAD 2004, AutoCAD 2005, AutoCAD 2006 DWG 2007 AC1021 AutoCAD 2007, AutoCAD 2008, AutoCAD 2009 DWG 2010 AC1024 AutoCAD 2010, AutoCAD 2011, AutoCAD 2012 DWG 2013 AC1027 AutoCAD 2013, AutoCAD 2014, AutoCAD 2015, AutoCAD 2016, AutoCAD 2017 DWG 2018 AC1032 AutoCAD 2018, AutoCAD 2019, AutoCAD 2020, AutoCAD 2021, AutoCAD 2022, AutoCAD 2023, AutoCAD 2024, AutoCAD 2025, AutoCAD 2026, AutoCAD 2027 History DWG (denoted by the .dwg filename extension) was the native file format for the Interact CAD package, developed by Mike Riddle in the late 1970s,Mike Riddle's Prehistoric AutoCAD - Retro Thing http://www.retrothing.com/2007/05/mike_riddles_pr.html https://web.archive.org/web/20090629024705/http://www.retrothing.com/2007/05/mike_riddles_pr.html June 29, 2009 live June 11, 2009 and subsequently licensed by Autodesk in 1982 as the basis for AutoCAD.Existing products http://www.fourmilab.ch/autofile/www/subsection2_3_12_1.html#SECTION00312100000000000000 https://web.archive.org/web/20081227031314/http://www.fourmilab.ch/autofile/www/subsection2_3_12_1.html#SECTION00312100000000000000 December 27, 2008 live June 11, 2009 http://www.fourmilab.ch/autofile/www/f/246.html The Autodesk File: Footnote September 22, 2007 June 6, 2011 https://web.archive.org/web/20110606012638/http://www.fourmilab.ch/autofile/www/f/246.html live DigiBarn Stories: Mike Riddle & the Story of AutoCAD, EasyCAD, FastCAD & more http://www.digibarn.com/stories/mike-riddle/index.html https://web.archive.org/web/20090525021710/http://www.digibarn.com/stories/mike-riddle/index.html May 25, 2009 live June 11, 2009 From 1982 to 2009, Autodesk created versions of AutoCAD which wrote no fewer than 18 major variants of the DWG file format,http://autodesk.blogs.com/between_the_lines/autocad-release-history.html Autodesk blog March 30, 2010 https://web.archive.org/web/20100323073806/http://autodesk.blogs.com/between_the_lines/autocad-release-history.html March 23, 2010 none of which is publicly documented. The DWG format is probably the most widely used format for CAD drawings. Autodesk estimates that in 1998 there were in excess of two billion DWG files in existence. http://www.autodesk.com/products/autocad/dwgoem/unplgfq2.htm DWG Unplugged Autodesk, Inc. https://web.archive.org/web/19980119080401/http://www.autodesk.com/products/autocad/dwgoem/unplgfq2.htm January 19, 1998 With over two billion AutoCAD DWG files worldwide... There are several claims to control of the DWG format.http://worldcadaccess.typepad.com/blog/2007/12/dwg-the-registr.html DWG: The Registration Attempts & Successes from WorldCAD Access July 1, 2008 July 17, 2011 https://web.archive.org/web/20110717125448/http://worldcadaccess.typepad.com/blog/2007/12/dwg-the-registr.html live As the biggest and most influential creator of DWG files it is Autodesk who designs, defines, and iterates the DWG format as the native format for their CAD applications. Autodesk sells a read/write library, called RealDWG,http://www.autodesk.com/developer-network/platform-technologies/realdwg Autodesk - Developer Network - RealDWG March 4, 2021 January 16, 2021 https://web.archive.org/web/20210116152457/https://www.autodesk.com/developer-network/platform-technologies/realdwg live under selective licensing terms for use in non-competitive applications. Several companies have attempted to reverse engineer Autodesk's DWG format, and offer software libraries to read and write Autodesk DWG files. The most successful is Open Design Alliance,Originally, OpenDWG Alliance. http://www.opendesign.com Open Design Alliance https://web.archive.org/web/20070528224521/http://www.opendesign.com/ May 28, 2007 live June 21, 2007 a non-profit consortium created in 1998 by a number of software developers (including competitors to Autodesk); it released a read/write/view library called the OpenDWG Toolkit, which was based on the MarComp AUTODIRECT libraries. https://web.archive.org/web/20081227030050/http://www.opendwg.org/node/86 December 27, 2008 (ODA has since rewritten and updated that code.) In 1998, Autodesk added file verification to AutoCAD R14.01, through a function called DWGCHECK. This function was supported by an encrypted checksum and product code (called a "watermark" by Autodesk), written into DWG files created by the program.http://autodesk.blogs.com/between_the_lines/2005/06/how_to_tell_if_.html Between the Lines: How to identify some problem DWG files September 22, 2007 July 20, 2011 https://web.archive.org/web/20110720170340/http://autodesk.blogs.com/between_the_lines/2005/06/how_to_tell_if_.html live https://web.archive.org/web/20070417090714/http://www.opendesign.com/dwg2007update.asp April 17, 2007 In 2006 Autodesk modified AutoCAD 2007, to include "TrustedDWG technology", a function which would embed a text string within DWG files written by the program: "Autodesk DWG. This file is a Trusted DWG last saved by an Autodesk application or Autodesk licensed application."This "TrustedDWG code" is encoded into DWG files in a fashion that is not humanly readable. This may be validated by using a binary editor to search a DWG file. This helped Autodesk software users ensure that the files they were opening were created by an Autodesk, or RealDWG application, reducing risk of incompatibilities.Autodesk originally used the term "Trusted DWG", with an embedded space. They modified it removing the space, prior to filing a US trademark application in September 2006, tarr.uspto.gov https://web.archive.org/web/20120223060854/http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=77009317 February 23, 2012 AutoCAD would pop up a message, warning of potential stability problems, if a user opened a 2007 version DWG file which did not include this text string. In 2008 the Free Software Foundation asserted the need for an open replacement for the DWG format, as neither RealDWG nor DWGdirect are licensed on terms that are compatible with free software license like the GNU GPL. Therefore, the FSF placed the goal 'Replacement for OpenDWG libraries' in 10th place on their High Priority Free Software Projects list.http://www.fsf.org/campaigns/priority.html#opendwgreplacement FSF promotes need for open DWG packages October 13, 2008 August 10, 2007 https://web.archive.org/web/20070810230457/http://www.fsf.org/campaigns/priority.html#opendwgreplacement live Created in late 2009, GNU LibreDWGhttps://www.gnu.org/software/libredwg/ GNU LibreDWG July 22, 2016 July 14, 2016 https://web.archive.org/web/20160714163706/http://www.gnu.org/software/libredwg/ live is a free software library released under the terms of the GNU GPLv3 license. It can read DWG files from version R13 up to 2021, and write R2000 DWG files. Also in 2008 Autodesk and Bentley Systems agreed on exchange of software libraries, including Autodesk RealDWG, to improve the ability to read and write the companies' respective DWG and DGN formats in mixed environments with greater fidelity. In addition, the two companies will facilitate work process interoperability between their AEC applications through supporting the reciprocal use of available Application Programming Interfaces (APIs).http://usa.autodesk.com/adsk/servlet/item?siteID=123112&id=11680608&linkID=14271589 January 1, 2009 Autodesk and Bentley to Advance AEC Software Interoperability July 8, 2008 https://web.archive.org/web/20090227030632/http://pressreleases.autodesk.com/index.php?s=press_releases&item=436%3C%2Ftd%3E February 27, 2009 Autodesk trademark On November 13, 2006, Autodesk sued the Open Design Alliance alleging that its DWGdirect libraries infringed Autodesk's trademark for the word "Autodesk", by writing the TrustedDWG watermark (including the word "AutoCAD") into DWG files it created.http://www.cadcourt.com/Docket/206cv01637.aspx Autodesk v. ODA October 16, 2008 https://web.archive.org/web/20081026211503/http://www.cadcourt.com/Docket/206cv01637.aspx October 26, 2008 dead Nine days later, Autodesk's attorneys won a broad and deep temporary restraining order against the Open Design Alliance.http://www.cadcourt.com/Docket/206cv01637.aspx Autodesk v. ODA See line 35, Transcript October 16, 2008 https://web.archive.org/web/20081026211503/http://www.cadcourt.com/Docket/206cv01637.aspx October 26, 2008 dead In April 2007, the suit was settled, essentially on Autodesk's terms, with Autodesk modifying the warning message in AutoCAD 2008 (to make it somewhat less alarming), and the Open Design Alliance removing support for writing the TrustedDWG watermark from its DWGdirect libraries. The effect of the temporary restraining order and subsequent consent decree was to render the Open Design Alliance's DWGdirect libraries, from one point of view, incapable of creating DWG files that are 100% compatible with AutoCAD.July 2025 Others point out that the failure of "100% compatibility" means only that loading such a drawing triggers an essentially irrelevant warning message when the file is opened in AutoCAD.http://www.cadcourt.com/Docket/206cv01637.aspx Autodesk v. ODA See line 50, Consent Judgment October 16, 2008 https://web.archive.org/web/20081026211503/http://www.cadcourt.com/Docket/206cv01637.aspx October 26, 2008 dead In 2006, Autodesk applied for registration of US trademarks on "DWG",Latest Status Info http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78852798 https://web.archive.org/web/20080611104024/http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78852798 June 11, 2008 live September 10, 2009Trademark Status & Document Retrieval https://tsdr.uspto.gov/ 2025-07-31 tsdr.uspto.gov February 18, 2020 https://web.archive.org/web/20200218074011/http://tsdr.uspto.gov/ live "DWG EXTREME",http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78852843 Latest Status Info September 10, 2009 February 23, 2012 https://web.archive.org/web/20120223061358/http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78852843 live "DWG TRUECONVERT",http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78852822 Latest Status Info September 10, 2009 February 23, 2012 https://web.archive.org/web/20120223061402/http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78852822 live "REALDWG",http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78852836 Latest Status Info September 10, 2009 February 23, 2012 https://web.archive.org/web/20120223061408/http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78852836 live "DWGX",http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78852849 Latest Status Info September 10, 2009 February 23, 2012 https://web.archive.org/web/20120223061416/http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78852849 live "DWG TRUEVIEW".http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78852813 Latest Status Info September 10, 2009 February 23, 2012 https://web.archive.org/web/20120223061422/http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78852813 live DWG TrueConverter USA.autodesk.com As early as 1996, Autodesk has disclaimed exclusive use of the DWG mark in US trademark filings.http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=75156366 Latest Status Info September 22, 2007 June 8, 2011 https://web.archive.org/web/20110608092951/http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=75156366 live Out of these applications, only TRUSTEDDWG has been registered as a trademark by the USPTO. The REALDWG and DWGX registrations were opposed by SolidWorks. The DWG EXTREME, DWG TRUECONVERT, and DWG TRUEVIEW trademark registration applications all received substantial resistance, with the USPTO examining attorney requiring Autodesk to disclaim exclusive use of DWG as a condition for their registration. In a non-final action in May 2007, the USPTO examining attorney refused to register the two DWG marks, as they are "merely descriptive" of the use of DWG as a file format name. In September 2007, Autodesk responded, claiming that DWG has gained a "secondary meaning," separate from its use as a generic file format name.United States Patent & Trademark Office As of June 22, 2008, all of Autodesk's DWG-related trademark registration proceedings were suspended by the USPTO, pending disposition of trademark opposition and cancellation petitions Autodesk had filed against the Open Design Alliance and Dassault Systèmes SolidWorks Corporation. The USPTO office actions notifying Autodesk of this noted that Autodesk was not the exclusive source of files with the format name DWG, and Autodesk does not control the use of DWG by others, either as a trademark or as a file format name, among other points. In 2006, Autodesk filed an opposition with the USPTO to the trademark registration of DWGGATEWAY by SolidWorks.dwg#page1.tif http://ttabvue.uspto.gov/ttabvue/ttabvue-91170857-OPP-1.pdf https://web.archive.org/web/20170208004540/http://ttabvue.uspto.gov/ttabvue/ttabvue-91170857-OPP-1.pdf February 8, 2017 live September 10, 2009 Autodesk subsequently filed a petition for cancellation of SolidWorks' trademark registration for DWGEDITOR.http://ttabvue.uspto.gov/ttabvue/ttabvue-92046253-CAN-1.pdf Ttabvue.uspto.gov September 10, 2009 February 27, 2017 https://web.archive.org/web/20170227220713/http://ttabvue.uspto.gov/ttabvue/ttabvue-92046253-CAN-1.pdf live In both cases, Autodesk's basis was that they had "been using the DWG name with its CAD software products since at least as early as 1983." The opposition and cancellation actions were consolidated, and suspended pending disposition of Autodesk's US District Court suit against SolidWorks.http://ttabvue.uspto.gov/ttabvue/ttabvue-91170857-OPP-32.pdf Ttabvue.uspto.gov September 10, 2009 February 11, 2017 https://web.archive.org/web/20170211212540/http://ttabvue.uspto.gov/ttabvue/ttabvue-91170857-OPP-32.pdf live In early 2007, Autodesk petitioned the USPTO to cancel the Open Design Alliance's "OpenDWG" trademarks, claiming that they had been abandoned.http://ttabvue.uspto.gov/ttabvue/ttabvue-92047002-CAN-1.pdf Ttabvue.uspto.gov September 10, 2009 February 10, 2017 https://web.archive.org/web/20170210064011/http://ttabvue.uspto.gov/ttabvue/ttabvue-92047002-CAN-1.pdf live This cancellation action was suspended pending disposition of Autodesk's US District Court suit against SolidWorks.http://ttabvue.uspto.gov/ttabvue/ttabvue-92047002-CAN-53.pdf Ttabvue.uspto.gov September 10, 2009 February 15, 2017 https://web.archive.org/web/20170215084730/http://ttabvue.uspto.gov/ttabvue/ttabvue-92047002-CAN-53.pdf live In 2008, Autodesk sued SolidWorks in US District Court, arguing that through its marketing efforts, the term "DWG" has lost its original generic meaning and taken on a secondary meaning referring specifically to Autodesk's proprietary drawing file format, and therefore any use of "DWG" in competitive products amounted to trademark infringement.Docket -> 3:08-cv-04397 (Autodesk v. SolidWorks) http://www.cadcourt.com/Docket/308cv04397AutodeskvSolidWorks.aspx https://web.archive.org/web/20090923040934/http://www.cadcourt.com/Docket/308cv04397AutodeskvSolidWorks.aspx September 23, 2009 dead September 10, 2009 In January 2010, on the morning that trial was scheduled to begin, Autodesk and SolidWorks settled the suit, with SolidWorks acknowledging Autodesk's trademark rights for DWG, surrendering its trademark registrations for its DWG related projects, and withdrawing its opposition to Autodesk's DWG-related trademark registrations.http://worldcadaccess.typepad.com/blog/2010/01/complete-text-of-autodesks-press-release.html Complete text of Autodesk's press release - WorldCAD Access April 15, 2010 December 27, 2010 https://web.archive.org/web/20101227115709/http://worldcadaccess.typepad.com/blog/2010/01/complete-text-of-autodesks-press-release.html live In April 2010, Autodesk and the Open Design Alliance settled their suit, with the Open Design Alliance agreeing to cancel its DWG-based trademark registrations and cease use of DWG and DWG-based trademarks in its product marketing and branding.http://opendesign.com/node/542 ODA Members | Open Design Alliance April 15, 2010 https://web.archive.org/web/20110823183406/http://opendesign.com/node/542 August 23, 2011 dead Because there was no adjudication in either case, the agreements between the parties are not binding upon the USPTO. In March 2010, the Office of the Deputy Commissioner for Trademark Examination Policy at the USPTO determined that evidence submitted by the Open Design Alliance two years earlier was relevant and supported a reasonable ground for refusal to register DWG as a trademark.United States Patent & Trademark Office In June 2011 the USPTO issued a final refusalhttp://tarr.uspto.gov/servlet/tarr?regser=serial&entry=78852798 USPTO September 24, 2011 Latest Status Info June 26, 2009 https://web.archive.org/web/20090626065625/http://tarr.uspto.gov/servlet/tarr?regser=serial live to register DWG as a trademark owned by Autodesk. They were quoted as saying:Grabowski Ralph WorldCAD Access http://worldcadaccess.typepad.com/blog/2011/07/no-joy-for-autodesk-as-uspto-continues-to-agree-that-dwg-is-not-registerable.html September 24, 2011 October 11, 2011 https://web.archive.org/web/20111011144648/http://worldcadaccess.typepad.com/blog/2011/07/no-joy-for-autodesk-as-uspto-continues-to-agree-that-dwg-is-not-registerable.html live DWG is merely descriptive of applicant's goods under Section 2(e)(1) of the Trademark Act for two reasons: (1) DWG is a recognized abbreviation for "drawing," and (2) .dwg is a file format used for computer-aided design (CAD) drawings made both with applicant's CAD software and others' CAD software. Autodesk appealed the decision. The USPTO affirmed in 2013 their refusal to recognise DWG as a trademark.November 5, 2013 Summary of Final Decisions Issued by the Trademark Trial and Appeal Board http://www.uspto.gov/web/offices/com/sol/og/2013/week45/TOC.htm Official Gazette of the United States Patent and Trademark Office 1396 47 January 31, 2014 February 1, 2014 https://web.archive.org/web/20140201232440/http://www.uspto.gov/web/offices/com/sol/og/2013/week45/TOC.htm live Despite this, Autodesk websites still claimed DWG as a trademark after the decision.Service & Support : Viewers http://usa.autodesk.com/support/viewers/ https://web.archive.org/web/20140131150419/http://usa.autodesk.com/support/viewers/ January 31, 2014 Autodesk, Inc January 31, 2014 In late 2014 Autodesk again lost, this time at the United States District Court for the Eastern District of Virginia. The judge dismissed all their arguments.Grabowski Ralph upFront.eZine Issue #836 http://www.upfrontezine.com/2014/upf-836.htm upfrontezine.com November 16, 2014 https://web.archive.org/web/20141129035622/http://www.upfrontezine.com/2014/upf-836.htm November 29, 2014 dead In 2015 Autodesk's website has a section title About DWGAbout DWG http://www.autodesk.com/products/dwg Autodesk.com Autodesk Inc February 3, 2015 in which they try to make a distinction between .dwg as a file format and the DWG technology environment. DWG support in freemium and free software As neither RealDWG nor DWGdirect are licensed on terms that are compatible with free software licenses like the GNU GPL, in 2008 the Free Software Foundation asserted the need for an open replacement for the DWG format. Therefore, the FSF placed the goal 'Replacement for OpenDWG libraries' in 10th place on their High Priority Free Software Projects list.https://www.phoronix.com/scan.php?page=news_item&px=MTI4Mjc FSF Wastes Away Another "High Priority" Project Michael Larabel January 24, 2013 Phoronix August 31, 2019 November 9, 2016 https://web.archive.org/web/20161109200145/https://www.phoronix.com/scan.php?page=news_item&px=MTI4Mjc live Forked in late 2009 from libDWG, GNU LibreDWG can read all DWG files from version R1.2 on.https://www.gnu.org/software/libredwg/manual/LibreDWG.html#Coverage GNU LibreDWG Manual January 1, 2026 But the LibreDWG library, offered under the GNU GPLv3, could initially not be used by most targeted FOSS graphic software, such as FreeCAD, LibreCAD and Blender, because of a GPLv2/GPLv3 license incompatibility.https://www.gnu.org/licenses/gpl-faq.html#v2v3Compatibility Is GPLv3 compatible with GPLv2? Free Software Foundation August 31, 2019 March 30, 2020 https://web.archive.org/web/20200330051354/http://www.gnu.org/licenses/gpl-faq.html#v2v3Compatibility livehttps://librearts.org/2012/01/whats-up-with-dwg-adoption-in-free-software/ What's up with DWG adoption in free software? Alexandre Prokoudine January 26, 2012 Libre Arts February 4, 2025https://librearts.org/2012/12/libredwg-drama-the-end-or-the-new-beginning/ LibreDWG drama: the end or the new beginning? December 27, 2012 Alexandre Prokoudine Libre Arts February 4, 2025 March 12, 2025 https://web.archive.org/web/20250312072238/https://librearts.org/2012/12/libredwg-drama-the-end-or-the-new-beginning/ live A GPLv2 licensed alternative is the libdxfrw project, which can read simple DWGs.https://sourceforge.net/p/libdxfrw/home/Home/ libdxfrw/Home Sourceforge August 31, 2019 August 31, 2019 https://web.archive.org/web/20190831193105/https://sourceforge.net/p/libdxfrw/home/Home/ live Some of these CAD licenses were only fixed recently to be able to use LibreDWG's GPLv3. FreeCAD is a free and open-source application that can work with the DWG files by using the proprietary ODA File Converter for .dwg and .dxf files from the Open Design Alliance (ODA).FreeCAD and DWG Import on freecadweb.org https://www.freecadweb.org/wiki/FreeCAD_and_DWG_Import November 11, 2014 FreeCAD Web August 31, 2019 August 31, 2019 https://web.archive.org/web/20190831021709/https://www.freecadweb.org/wiki/FreeCAD_and_DWG_Import live The ODA also provides a freeware stand-alone viewer for .dwg and .dgn files, ODA Drawings Explorer, which runs on Windows, Linux, and Mac OS X. LibreCAD is a free and open-source 2D CAD application that can open DWG and DXF files using its own library. The quality of DWG format compatibility in these non-Autodesk CAD applications can be assessed using the Budweiser.dwg benchmark drawing.Budweiser.dwg benchmark on cadstudio.cz https://www.cadstudio.cz/budweiser October 11, 2018 CAD Studio/ARKANCE August 23, 2025 August 23, 2025 https://web.archive.org/web/20250823065541/https://www.cadstudio.cz/budweiser live Autodesk DWG TrueView is a freeware, closed source, stand-alone DWG viewer with DWG TrueConvert software included, built on the same viewing engine as AutoCAD software. The freeware Autodesk Design Review software adds a possibility to open DWG files in Design Review to take advantage of measure and markup capabilities, sheet set organization, and status tracking. See also ISO 10303-21 CAD data exchange AutoCAD DXF ZWCAD BricsCAD Computer-aided design CAD Comparison of CAD software Comparison of CAD, CAM and CAE file viewers Design Web Format FreeCAD GstarCAD IntelliCAD LibreDWG LibreCAD OpenDWG Open Design Alliance References 30em External links LibreDWG https://web.archive.org/web/20160714163706/http://www.gnu.org/software/libredwg/ July 14, 2016 is a work in progress developing Free Software libraries to support DWG files. Teigha is a software development platform used to create engineering applications including CAD with native support of .dwg and .dgn files. Specification of the .dwg file format provided by Open Design Alliance. cad-blocks Example .dwg architecture files. Category:Autodesk DWG DWG DWG Category:Open file formats