Best Free CAD Viewers

PloViewMini is a freeware (license fee free) viewer for viewing HP-GL file drawings, and has the following features: (1) High-speed display of vector drawings and many display-related commands (2) Line color, width change, black and white/color switching of the entire drawing, background color switching, pen ON/OFF (3) Rotation, mirror, grid display (4) Character font (TrueType) font switching, character size change (5) Coordinate display (6) Multi-page support (7) Input file format is HP-GL (not compatible with HP-GL/2 or HP RTL) PloViewMini is a limited-function version of the paid version of PloView.

IrfanView is a fast, compact and innovative FREEWARE (for non-commercial use) graphic viewer for Windows XP, Vista, 7, 8 and 10. It is designed to be simple for beginners and powerful for professionals. IrfanView seeks to create unique, new and interesting features, unlike some other graphic viewers, whose whole "creativity" is based on feature cloning, stealing of ideas and whole dialogs from ACDSee and/or IrfanView! IrfanView was the first Windows graphic viewer worldwide with Multiple (animated) GIF support. One of the first graphic viewers worldwide with Multipage TIF support. The first graphic viewer worldwide with Multiple ICO support. Lossless JPG rotation, crop and EXIF date change (also in batch mode). Slideshow (save slideshow as EXE/SCR or burn it to CD). Batch conversion (with advanced image processing of all files). Support for embedded color profiles in JPG/TIF files. No registry changes without user action/permission!

Design Review CAD viewer software lets you view, mark up, print, and track changes to 2D and 3D files for free, without the original design software. Work with a variety of file formats, including: DWF, DWFx, DWG, and DXF (requires installation of free DWG TrueView software); Adobe PDF; as well as image file types such as.bmp, .jpg, .gif, .pcx, .pct, .png, .rlc, .tga, .tif, .mil, .cal, and more. Use intuitive tools to measure, mark up, and review 2D and 3D designs on the desktop. Share changes with your extended team and stakeholders, even if they don’t have the original design software. Eliminate paper and avoid misunderstandings. Take advantage of enhanced features and tools for DWF Viewer and Volo View users. Open and view high-resolution drawings, maps, and models. Measure parts, areas, surfaces, and dimensions for more accurate communication. Add comments, information, and suggestions for design changes to 2D and 3D files.

Creating high-quality products helps our customers succeed. We firmly believe that good products can talk and customers' recognition is our greatest confidence. Through continuous precipitation of the technology platform, we are committed to customer satisfaction. We firmly believe that good technology can create efficiency, and user demands should be more quickly responded to and better satisfied. Through continuous openness and data flow, together with our ecological partners, we will achieve a win-win situation. We firmly believe that a good ecology should be built together, and a win-win ecology will bring more value creation and a digitally intelligent future.

Onshape by PTC is the leading cloud-native CAD & PDM platform that runs on any device, anywhere-requiring zero IT. Onshape is for product design companies who are fed up with the errors, time waste, and hidden costs of outdated file-based CAD & PDM.

Open and see any 3D part or assembly clearly—without expensive CAD software. 3D‑Tool lets you open, view, measure, and mark-up 3D CAD models in a simple, affordable way. Designers, engineers, and project managers can review parts from many CAD systems without needing the original software. The Premium and Advanced versions support 20+ file formats and let you share annotated models with anyone using the Free Viewer app. The Free Viewer opens native 3D‑Tool files (Those exported by a paid version of 3D-Tool) and STL files, making collaboration easy. The Premium version adds a powerful converter that turns native CAD files into STEP or CAT formats for use in NC, CMM, and other systems that can’t open the originals. Cross Sections • Exploded Views • 3D/2D Measure • Model Compare • Draft & Wall Analysis • Collision Check • Custom Views • Annotations • Publish EXE/DDD/3D‑PDF • STL/OBJ/3DS/PLY Export

Free Online 3D CAD Viewer. Open STEP, IGES, OBJ, STL files and visualize them directly in the web browser. PC, Tablet or Mobile, all the devices are supported. CAD-Viewer.com is a browser-based platform that lets users instantly view, inspect, and share 3D CAD models online. It supports popular formats such as STEP, IGES, STL, and OBJ, making it easy to open files from different design tools. The viewer works on any device, including PCs, Macs, tablets, and smartphones, with no software downloads required. Users get the same smooth experience across desktop and mobile browsers. All viewing is done entirely in the cloud, eliminating installation and setup time. Secure cloud storage ensures files are protected and automatically backed up. With one-click sharing links, users can collaborate easily or keep projects private.

LibreCAD is a free Open Source CAD application for Windows, Apple and Linux. Support and documentation are free from our large, dedicated community of users, contributors and developers. LibreCAD started as a project to build CAM capabilities into the community version of QCad for use with a Mechmate CNC router. Since QCad CE was built around the outdated Qt3 library, it had to be ported to Qt4 before additional enhancements. This gave rise to CADuntu. The project was known as CADuntu only for a couple of months before the community decided that the name was inappropriate. After some discussion within the community and research on existing names, CADuntu was renamed to LibreCAD. Porting the rendering engine to Qt4 proved to be a large task, so LibreCAD initially still depended on the Qt3 support library. The Qt4 porting was completed eventually during the development of 2.0.0 series, thanks to our master developer Rallaz, and LibreCAD has become Qt3 free except in the 1.0.0 series.

Autodesk Viewer supports most 2D and 3D files, including DWG, STEP, DWF, RVT, and SolidWorks. Quickly get the feedback you need with Autodesk Viewer's lightweight drawing and annotation tools. Autodesk Viewer lets you access and collaborate on your designs from any device or operating system. View DWG files or convert them to work with older versions of AutoCAD software. Add Design Review to mark up 2D and 3D files without the original design software. For greater flexibility consider Autodesk Viewer or AutoCAD web app. Get quick, anytime access to CAD drawings with the AutoCAD web app. View, edit, share, and create DWG files in a web browser on any computer. No software installation required. Use the drafting tools and commands you're used to.

Open Cascade CAD Assistant is a powerful offline 3D CAD viewer and converter with simple and intuitive interface, free for both personal and commercial use. Originally developed as a testbed and showcase for the Open CASCADE Technology on mobile platforms, the solution has been appreciated as fast and handy 3D viewer by thousands of end-users on mobiles and desktops worldwide. CAD Assistant brings the power of open technologies to the hands of engineers working with 3D data. CAD Assistant is based on open source libraries (Open CASCADE Technology, Qt, FreeType, FreeImage, etc.) and employs open formats for CAD and mesh data (STEP, IFC, IGES, BREP, glTF, JT, PLY, STL, OBJ, 3DM). It also supports a set of other file formats like DXF, SAT (ACIS), XT (Parasolid). Viewing mesh models with associated data is an additional functionality included in CAD Assistant. Mesh can be read from files in PLY format.

Cortona2D Viewer enables you to view various graphic formats including CGM, BMP, ICON, GIF and JPEG to name just a few. Cortona2D Viewer works as a pluggable component for Internet Explorer and Office applications (Microsoft PowerPoint, Microsoft Word). At this time the Cortona2D Viewer is available on the Windows platform. Cortona2D Viewer is more than just a viewer! The powerful API allows for integration of Cortona2D Viewer into any third-party application supporting ActiveX technology. With Cortona2D Viewer, you can create a wide range of 2D applications. Navigate hotspots and embedded hyperlinks in your technical drawings just like any web page. 2D images generated in procedures are linked to the procedure action and timeline allowing automated update (including raster images generated from 3D). 2D images generated in catalogs are linked to the sheet view allowing automated update (including raster images from 3D).

Work on multiple projects in CAD and exchange data by establishing a connection that translates the content from one compatible input format to another. The utility opens and views files from all CAD systems and selects the entirety of it or selected parts for translation. With free version of Delcam Exchange you can read all commonly used CAD format files as ACIS, IGES, Parasolid, STEP, VDA, AutoCAD (dwg, dxf), CATIA V3, V4, V5, Cimatron, Elite, IDEAS, Inventor, Pro/Engineer, Rhino, SolidEdge, SolidWorks, SpaceClaims, TopSolid, Unigraphics NX. Exchange is Delcam's CAD translation solution. Exchange is a powerful stand alone CAD translator program capable of translating from many popular CAD input formats to many output formats. Downloading Exchange and opening and viewing files from all compatible systems is free and without obligation, and everything is confidential as you don't have to send any of your CAD data files over the internet.

The JETCAM CAD Viewer is a free tool to allow viewing of all major 2D CAD files on your PC. It's a lightweight tool which does not require much memory or hard disc space, and runs extremely fast. It's ideal to install on top of existing CAD/CAM software to provide you with a fast, one-click viewing of CAD files, with pan and zoom capabilities. It's provided free, 'as is' and without warranty. Extremely lightweight, JETCAM CAD Viewer can be installed on unlimited computers within your company. It provides instant viewing of all major CAD files, along with native JETCAM component files. Totally free. There's no time period or fee to unlock additional features. No registration required to download or use, just click on the Download link. No adverts, spyware or malware. Extremely small memory footprint, around 50MB when running. Simple tree view for all local and mapped network drives. Thumbnail images of all recognised 2D CAD files.

Find and use the function at a similar place in a similar way. Load bunch of DWG files instantly. DWG FastView Plus is light-weight and super-fast. Use viewing tools like zoom, pan, 3D Orbit and magnifier. Help you view drawings with ease. Apply quick measure to display the linear horizontal and vertical measurements of closed objects temporarily. Easy control of drawing layers and external reference, manage object properties through palettes and search text much faster. Apply standard dimensioning tools to add accurate information to drawing design. Change between standard drawing units applied to measurement and dimensioning only. Ability to convert a bunch of DWG files to an older or current version available with one click. After you have completed a drawing, plot it to a plotter, printer or file.

DWGSee Viewer & Editor is a lightweight and high-performance CAD application designed for viewing, editing, and printing DWG, DXF, and DWF files. It allows users to browse drawings quickly and make precise modifications without the complexity of full CAD software. DWGSee Viewer & Editor supports AutoCAD file versions from R14 through the latest 2026 releases. The platform includes tools for drawing, modifying objects, adding annotations, and marking up designs. Smart measuring features enable accurate calculation of lengths, angles, areas, and radii using snap points. DWGSee Viewer & Editor also supports batch printing, drawing comparison, and file export for efficient collaboration. With its fast performance and simple interface, DWGSee Viewer & Editor helps users work with CAD drawings more efficiently.

CADMATIC Drawing Viewer is a free software for viewing and printing CAD drawings. It also includes basic drawing, editing, and printing features, but it does not allow saving. With CADMATIC Drawing Viewer you can open files in DRW, DWG, and DXF formats, both in 2D and in 3D. CADMATIC Drawing Viewer also contains predefined special printing routines for drawings created with CADMATIC Electrical. Although CADMATIC Drawing Viewer does not include all the functionalities of our CADMATIC Draw software, it does contain a selection of useful features to help you practice using our industry-leading solution. Opens and creates combination IFC models such as architectural, structural, HVAC, and electrical models compliant with the IFC 2x3 CV 2.0 standard. You can also change the appearance of the printouts in a wide variety of ways, such as the line thickness. Predefined special functions for layer processing and printing.

Creo View is a simple but powerful enterprise visualization technology that enables virtually effortless collaboration across local and global design teams. Access to multiple forms of engineering data including 3D CAD models, 2D drawings, electrical schematics, and printed circuit boards both interactively at your desktop or through augmented reality (AR) allows design authors, project managers and downstream suppliers to quickly and easily access and share information between themselves and other stakeholders. Creo View makes the comparison and validation process easy, with single-view interrogation of mechanical and electrical design, project and part data. With Creo View, you’re on the way to faster and higher quality design reviews, improved user and extended design team collaboration, and higher quality products at a lower cost. From our free-for-life Creo View Express viewer to lightning-fast and ultra-scalable viewers, PTC offers a range of commercial viewing options.