Change colours, line thickness, special effects and more with the right hand menu. Press space to toggle the depth overlay, which shows how deep into the scene you are currently drawing. In the field of drafting and 3D design, few names are as well-known as AutoCAD. First launched by AutoDesk in the 1980s, AutoCAD was considered THE standard software platform for drafting for decades. Until today, there are still so many AutoCAD users that the standard AutoCAD output file – the DWG – can be found everywhere.
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In the field of drafting and 3D design, few names are as well-known as AutoCAD. First launched by AutoDesk in the 1980s, AutoCAD was considered THE standard software platform for drafting for decades. Until today, there are still so many AutoCAD users that the standard AutoCAD output file – the DWG – can be found everywhere.
However, not all people have the budget to buy the AutoCAD software platform, which costs more than $1000. For users, who just want to view DWG files, a free DWG viewer software could be really useful. If you’re one of these people, then read on as we look at the best alternative DWG viewers. Best of all, they’re all free!
What are DWG files?
DWG (from drawing) is the native file format for 2D and 3D drawing created in AutoCAD, as well as in other CAD packages such as BricsCAD and IntelliCAD. It is a proprietary binary file format. Since it contains vector image data, the drawings in each DWG file can be scaled while still preserving resolution. Each DWG files contains metadata that describes the contents of the file. Its interchange file format is DXF, which is an ASCII version of the contents of a DWG file.
The top 8 best free DWG viewers1. AutoDesk DWG TrueView (with Design Review)
DWG TrueView is the official free DWG viewer software from AutoDesk which can be downloaded from their website. Aside from being able to view DWG drawings, DWG TrueView was for the conversion of DWG and DXF files into 3D DWF for quick markup and publishing.
Since the software is built on the same architecture as AutoCAD, you are assured of drawing fidelity and integrity, even when you switch from one format to another. This is very useful if you need to collaborate with other users who are using different versions of AutoCAD.
DWG TrueView is made even better with Design Review, a free add-on also developed by AutoDesk. Design Review allows you to make length, area, and angle measurements on the design, as well as add annotations and comments. Again, these are great tools for collaboration. With the add-on feature, you can pretty much do everything you want with your DWG file short of editing it.
2. LibreCAD
LibreCAD is an open source platform for viewing, editing, and converting DWG files. Being an open source software, it’s completely free with all functions included. However, its biggest limitation is that it can only display 2D views, which helps keep the size of the software quite small. It can also display isometric views but lacks any sort of 3D navigation.
Aside from the lack of 3D viewing, you can do just about anything with LibreCAD. You can add basic lines and polygons, take measurements, and export your files into other formats. It’s also quite easy to learn, and the interface is user-friendly, features that are unusual in open source software platforms.
The main limitation of the open source nature of LibreCAD is that some of its versions can be unstable. Before updating to another version, you need to read up on update notes and feedback from other users to make sure that you are updating to a functional build. As a free software platform, LibreCAD certainly gets the job done – just don’t expect anything fancy.
3. FreeCAD
FreeCAD is certainly one of the most feature-rich free DWG viewers out there. Calling it a DWG viewer might even be a disservice to FreeCAD, as it can be considered a full 3D parametric modeling software. Best of all, FreeCAD is open source, so everything is completely free.
With FreeCAD, you don’t have to begin with an existing DWG file and simply make edits. You can use FreeCAD to come up with your very own 2D sketches and model them in 3D space. From these models, you can take measurements, adjust dimensions, and extract various design details. The program has a steeper learning curve compared to LibreCAD, but it’s not so overwhelming to be inaccessible. Still, we wouldn’t classify FreeCAD as beginner friendly.
Being another open source software, FreeCAD can be prone to bugs, especially when new builds are released. Although it’s one of the most feature-rich free CAD software platforms, it still doesn’t compare to the full range of functions of AutoCAD, but perhaps that’s an unfair comparison.
4. ShareCAD
Instead of a software that needs to be installed, ShareCAD provides an online browser-based platform for viewing of CAD drawings. It supports the proprietary DWG, DWF, and DXF file formats plus a host of other formats for 3D drawings, raster, and vector images, and even archives. The service does not require any downloads or registration, but the file you need to view will have to be uploaded to their server. The file size is also limited to only 50 MB.
The features of ShareCAD are quite limited but are enough for a quick inspection of 3D drawings. You can view individual layers, zoom in on features, or change the background color for easier viewing. You can also print out the drawings. If you’d like to share your drawings with other contacts, ShareCAD can generate a link that you can share.
5. Autodesk A360
A360, an official AutoDesk release, is quite different from the other entries in the list. Instead of desktop software, A360 is a mobile app compatible with both Android and iOS. It can view both DWF and DWG files, as well as 50 other CAD file formats. With the ability to make annotations, take measurements, and navigate components, A360 is surprisingly powerful for a mobile app.
The intention of A360 is to allow engineers and project managers to view CAD files anywhere in the world using just their mobile devices. This is a great tool for collaboration and can be very useful during project execution. Of course, the quality of the experience when viewing project files will vary based on the specs of the mobile device being used. If your smartphone or tablet has a low-specs GPU, then merely opening a DWG file can be very slow.
The A360 mobile platform does not allow for editing of files. Although this seems hardly surprising, there are already mobile platforms being developed that have functions that the A360 does not offer. Autodesk seems like they have a bit of catching up to do, but the A360 is a perfectly serviceable mobile app for now.
6. OnShape
OnShape is an entirely cloud-based 3D CAD software that has been designed especially for collaborative work. Since everything is cloud-based, there is nothing to install and you can access the platform from any workstation – even on your phone or tablet. It has a friendly learning curve, and anyone who has had any experience with standard CAD software can get the hang of it quickly.
OnShape is capable of just about anything you could want from CAD software. You can create and edit models, take measurements, extract design details, and export to a variety of file formats. Where OnShape truly shines is in its collaborative platform. OnShape allows multiple users to simultaneously a single master file. Everyone shares the same workspace and works with the same dataset, eliminating the need to keep track of different versions of the same file.
The drawback is that OnShape isn’t actually free – they now charge for an annual subscription, and the price depends on the package you want. However, they still offer a free trial. This is something you can take advantage of, although you can probably only use it for a limited time.
7. Autodesk Fusion360
Another free DWG viewer from Autodesk, Fusio360 is an all-in-one platform designed for industrial designers, mechanical engineers, students, and educators. It’s a very simple software with basic functions, making it an excellent option for coming up with quick 3D models, simulations, and analysis. Everything is cloud-based, so the platform is quick even without advanced hardware.
Fusion360 is ideal for simple design jobs with assembly and parametric design features. If you’re going for complex models, then you’ll probably have to look elsewhere. However, there’s no reason that Fusion360 can develop more complex functions in future versions.
Models made in Fusion360 can be exported as STL files, which is one of the default file formats used by 3D printers. This makes Fusion360 one an especially suitable design software for rapid prototyping. Moreover, the software is quite easy to learn even for relative beginners.
The downside of Fusion360 is that it’s only free for a 30-day trial. After the trial period, you’ll have to fork out around $60 per month for a subscription. We still recommend trying it out – you might like it so much that you end up paying full price.
8. IrfanView
IrfanView is described as a free, fast, and compact “graphic viewer.” It can open just about any graphic or design file format. Although it’s more well-known as an all-around image viewer, it’s also capable of opening CAD files in DWG or DWF formats. You’ll need to install the BabaCAD4Image plug-in, but don’t worry – the plug-in is also free.
Granted, there’s not much else you can do with IrfanView aside from rotating your models, adjust its brightness, modify its color, and a bunch of other cosmetic changes. After all, it’s not a dedicated CAD software. IrfanView is still a nice software that you can keep installed in your system. It hardly takes any disk space and could be useful when you encounter a tricky image file format.
Final thoughts
3D and 2D models made from AutoCAD have remained the standard file formats in the fields of drafting, engineering, and industrial design for the past few decades. Frankly, we can’t imagine a future where DWG files aren’t the standard way that people share and collaborate on 3D designs. This can be challenging for professionals and small firms that can’t afford a full AutoCAD platform.
The free DWG viewers we have listed here offer a partial solution to this problem. None of them come quite close to the functionality of the original AutoCAD, but they are, at least, good enough to view DWG files. Some of them offer limited measurement and editing features. Most importantly, they are free. If you work in any field that requires sharing and viewing of DWG files, it would be a good idea to have one or two of these installed in your workstation.
Warning; 3D printers should never be left unattended. They can pose a firesafety hazard.
This is a list of free and open source 3D CAD (computer-aided design) software packages. More precisely MCAD (Mechanical computer-aided design) software.
- FreeCAD- About FreeCAD
FreeCAD is a general purpose parametric 3D CAD modeler, whose development is completely open source (LGPL License). FreeCAD is aimed directly at mechanical engineering and product design but also fits in a wider range of uses around engineering, such as architecture, finite element analysis, 3D printing, and other tasks.
FreeCAD features tools similar to Catia, SolidWorks or Solid Edge, and therefore also falls into the category of MCAD, PLM, CAx and CAE. It is a feature based parametric modeler with a modular software architecture which makes it possible to provide additional functionality without modifying the core system.
FreeCAD is also multi-platform, and currently runs on Linux/Unix, Windows, and Mac OSX systems with the same look and functionality on all platforms.
FreeCAD is maintained and developed by a community of enthusiastic developers and users (see the contributors page). They work on FreeCAD voluntarily, in their free time. They cannot guarantee that FreeCAD contains everything you might wish, but they will do their best! The community gathers on the FreeCAD forum, where most of the ideas and decisions are discussed. Feel free to join us there!
- Salome Shaper
SHAPER is a parametric and variational CAD modeler. It offers improved ergonomics that are best suited for the drawing from the graphical interface. The variational aspect allows the user to draw interactively a sketch with dimensions and constraints, just what he sees on a technical drawing. The parametric aspect ensures that the final shapes are automatically updated when a parameter of a CAD feature is modified. It also allows simple assembly of 3D parts.
Create, modify, import and export (IGES, STEP, BREP, ...), repair and clean CAD models.
SHAPER module of SALOME is destined for:
- BRL-CAD
BRL-CAD is a constructive solid geometry (CSG) solid modeling computer-aided design (CAD) system. It includes an interactive geometry editor, ray tracing support for graphics rendering and geometric analysis, computer network distributed framebuffer support, scripting, image-processing and signal-processing tools. The entire package is distributed in source code and binary form.
Although BRL-CAD can be used for a variety of engineering and graphics applications, the package's primary purpose continues to be the support of ballistic and electromagnetic analyses. In keeping with the Unix philosophy of developing independent tools to perform single, specific tasks and then linking the tools together in a package, BRL-CAD is basically a collection of libraries, tools, and utilities that work together to create, raytrace, and interrogate geometry and manipulate files and data. In contrast to many other 3D modelling applications, BRL-CAD primarily uses CSG rather than boundary representation.[2] This means BRL-CAD can 'study physical phenomena such as ballistic penetration and thermal, radiative, neutron, and other types of transport'. [3] It does also support boundary representation.[4]
The BRL-CAD libraries are designed primarily for the geometric modeler who also wants to tinker with software and design custom tools. Each library is designed for a specific purpose: creating, editing, and ray tracing geometry, and image handling. The application side of BRL-CAD also offers a number of tools and utilities that are primarily concerned with geometric conversion, interrogation, image format conversion, and command-line-oriented image manipulation.
- OpenJSCAD
JSCAD (formally know as OpenJSCAD) provides a programmer’s approach to develop 3D models. In particular, this functionality is tuned towards creating precise models for 3D printing.
JSCAD provides:
- NaroCAD
The goal of this project is to develop a fully fledged and extensible 3D CAD software based on the concept of parametric modeling of solids, comparable to well known solutions.
- OpensCAD
OpenSCAD is software for creating solid 3D CAD models. It is free software and available for Linux/UNIX, Windows and Mac OS X. Unlike most free software for creating 3D models (such as Blender) it does not focus on the artistic aspects of 3D modelling but instead on the CAD aspects. Thus it might be the application you are looking for when you are planning to create 3D models of machine parts but pretty sure is not what you are looking for when you are more interested in creating computer-animated movies.
OpenSCAD is not an interactive modeller. Instead it is something like a 3D-compiler that reads in a script file that describes the object and renders the 3D model from this script file. This gives you (the designer) full control over the modelling process and enables you to easily change any step in the modelling process or make designs that are defined by configurable parameters.
OpenSCAD provides two main modelling techniques: First there is constructive solid geometry (aka CSG) and second there is extrusion of 2D outlines. Autocad DXF files can be used as the data exchange format for such 2D outlines. In addition to 2D paths for extrusion it is also possible to read design parameters from DXF files. Besides DXF files OpenSCAD can read and create 3D models in the STL and OFF file formats.
- SolveSpace
Solvespace is a free (GPLv3) parametric 3d CAD tool.
Applications include:
- gCAD3D
3D CAD/CAM - software for MS-Windows and Linux. This program is free software (GPL-3); you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation.
- FlatFab
Flatfab is software that helps you design and fabricate 3D objects. We imagine in 3D but ideate and draw in 2D. flatfab seamlessly does both.
Free 3d Drafting Software For Mac
Flatfab marries digital modeling and traditional craftsmanship. 3D printing in new-age materials is great for small complex objects, but prohibitive in time and money for anything bigger than your fist. Flatfab enables designers and hobbyists to use their own skills working with common tools and materials, anything that is reasonably flat and can be cut: paper, plastic, wood, steel, even stone.
Free 3d Drafting Software Download
The flatfab way
Free 3d Drafting Software For Beginners- FREE!shipBest Free 3d Drafting Software
FREE!ship is a surface modeling program for designing ships yachts and boats. Subdivision surfaces are used rather than NURBS to give the designer the freedom to design any desired hullshape. Unfold surfaces, panel based hydrostatics, various exp formats
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