Best 3D Cad Model Viewer Apps

242+ iOS apps curated and reviewed

3.8 avg rating
19 free apps
Updated August 2026

Looking for free 3d cad model viewer apps? 19 of our 242+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top 3D Cad Model Viewer Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
13D CAD Model Viewer3D CAD Model ViewerFree3.3★ (13)NoNoMay 2026
2ViewCAD:2D/3D CAD Model ViewerViewCAD:2D/3D CAD Model ViewerFreeNoYesMay 2026
3Open3D: STL & 3D Model ViewerOpen3D: STL & 3D Model ViewerFree4.8★ (4)YesNoAug 2026
4STL & 3D Model Viewer - Mes3DSTL & 3D Model Viewer - Mes3DFree4.3★ (7)NoYesSep 2026
5STP Viewer : STEP 3DSTP Viewer : STEP 3DFreeNoYesJul 2026
6DWG FastView-CAD Viewer&EditorDWG FastView-CAD Viewer&EditorFree4.5★ (1.1K)YesYesSep 2026
73D Model Viewer - AR & Print3D Model Viewer - AR & PrintFree4.4★ (336)NoYesSep 2026
8STL Simple ViewerSTL Simple ViewerFree4.3★ (866)YesYesAug 2026

Top Picks for 3D Cad Model Viewer

3D CAD Model Viewer#1

3D CAD Model Viewer by Machine Research Corporation

Editor's Choice
💼 Business
3.3(13 ratings)
Free
3D CAD Model Viewer screenshot 1

Easily view, analyze, and share 3D CAD models and drawings from various file formats. Organize your models into a catalog for quick reference and access job information. Streamline your quoting process by leveraging past projects and profitability data.

Open3D: STL & 3D Model Viewer#3

Open3D: STL & 3D Model Viewer by Rajesh Konatala

View STL, GLB, STEP, DXF & OBJ
Worth Considering
🎨 Graphics & Design
4.8(4 ratings)
FreeAds
Open3D: STL & 3D Model Viewer screenshot 1
Open3D: STL & 3D Model Viewer screenshot 2
Open3D: STL & 3D Model Viewer screenshot 3
Open3D: STL & 3D Model Viewer screenshot 4
Open3D: STL & 3D Model Viewer screenshot 5

Instantly view and inspect a wide range of 3D file formats directly on your device. Offers AR viewing, 3D printing readiness checks, and detailed model specifications without requiring an account or cloud upload.

More 3D Cad Model Viewer apps to explore

4
STL & 3D Model Viewer - Mes3D
STL & 3D Model Viewer - Mes3D
STL & 3D Model Viewer - Mes3D
Supports STEP, GLB, OBJ, glTF
Free

Easily view, inspect, and explore 3D models on your device. Supports common file formats and offers intuitive touch controls for rotation, panning, and zooming. Visualize models in AR and capture snapshots for sharing.

Import 3D files (STL, GLB, OBJ, USDZ, etc.)Intuitive touch controls for rotation, pan, zoomMesh-based preview and rendering
🛠️ Developer Tools
(7)
free
5
STP Viewer : STEP 3D
STP Viewer : STEP 3D
STP Viewer : STEP 3D
3D CAD File Reader & Opener
Free
🔧 Utilities
(0)
6
DWG FastView-CAD Viewer&Editor
DWG FastView-CAD Viewer&Editor
DWG FastView-CAD Viewer&Editor
* Support 2D/3D CAD formats
Free

This cross-platform CAD application allows users to view, edit, and create 2D and 3D designs on the go. It supports a wide range of file formats and offers advanced tools for precise drawing, measurement, and annotation, even offline.

View and edit 2D/3D CAD drawingsSupports over 40 3D drawing formatsAccurate measurement and annotation tools
📊 Productivity
(1.1K)
free with in-app purchases
7
3D Model Viewer - AR & Print
3D Model Viewer - AR & Print
3D Model Viewer - AR & Print
Simulate 3D Printing and AR
Free

Explore and interact with 3D models on your mobile device. Simulate the 3D printing process to identify potential issues before committing to a print. Visualize your models in augmented reality, adjusting scale and rotation within your real-world environment.

View 3D models in real-timeRotate, zoom, and paint modelsSimulate 3D printing process
📊 Productivity
(336)
free with in-app purchases
8
STL Simple Viewer
STL Simple Viewer
STL Simple Viewer
View 3D STL & 3MF CAD models
Free

Easily view and interact with 3D STL CAD models. Supports various file types and offers advanced rendering options for detailed analysis. Get model information and explore interiors with clipping planes.

View ASCII and Binary STL filesLoad STL from ZIPRotate, pan, and zoom
📊 Productivity
(866)
free with in-app purchases
9
Model Viewer | CAD Viewer
Model Viewer | CAD Viewer
Model Viewer | CAD Viewer
STL, GLB, USD, OBJ, 3DM, PLY
Free

View and inspect 3D model files with ease. Import various formats, manipulate the view with intuitive controls, and access basic model information on a clear workspace.

3D model inspectionImport multiple file formatsRotate, pan, and zoom controls
🎨 Graphics & Design
(1)
free
10
CAD Reader-View & Measure DWG
CAD Reader-View & Measure DWG
CAD Reader-View & Measure DWG
DWG & PDF viewer
Free

This application allows users to view, measure, and annotate CAD files and PDFs. It supports multiple drawing formats and offers tools for collaboration, including image and voice annotations. Convert PDFs to CAD and manage layers with advanced features.

View DWG, DXF, and PDF filesScale drawing and measure area/lengthAdd image, voice, and text annotations
📊 Productivity
(22)
free with in-app purchases
11
3D Kit: STL Viewer
3D Kit: STL Viewer
3D Kit: STL Viewer
CAD Model & Print Preview AR
Free
🎨 Graphics & Design
(0)
12
Sketch Viewer UP-model browser
Sketch Viewer UP-model browser
Sketch Viewer UP-model browser
Sketch UP Skp model browser
Free

This application allows users to import and view 3D models from various professional design software. It supports a wide range of file formats, making it convenient for designers, engineers, and students to access and analyze 3D drawings on their mobile devices.

Import and view 3D drawingsSupports multiple professional 3D file formatsCollection of standard industry libraries
📊 Productivity
(10)
free with in-app purchases
13
3D Model Viewer: STL & USDZ
3D Model Viewer: STL & USDZ
3D Model Viewer: STL & USDZ
View 3D USDZ and CAD STL, PLY
Free

Easily view and interact with 3D models in various formats like USDZ, STL, and OBJ. Explore your designs with intuitive gestures, high-performance rendering, and augmented reality capabilities. Record animations of your models for sharing.

View USDZ, STL, OBJ, PLY filesIntuitive gesture controlsHigh-performance rendering
📊 Productivity
(11)
free with in-app purchases
14
STEP Viewer
STEP Viewer
STEP Viewer
Fast STEP File Viewer
Free
📊 Productivity
(0)
15
3D Model Viewer - AR View
3D Model Viewer - AR View
3D Model Viewer - AR View
View model in AR and 3D mode
Free

View and interact with various 3D model formats in both AR and 3D modes. This intuitive tool supports local and cloud documents, custom backgrounds, and shadow casting. Easily import models via multiple methods and share your creations.

AR and 3D viewing modesSupports numerous 3D file formatsLocal and cloud document integration
📊 Productivity
(328)
free with in-app purchases
16
Quick STL Viewer
Quick STL Viewer
Quick STL Viewer
Clean 3D Model Viewer
Free

Instantly open and preview 3D STL files with a smooth, responsive interface. Explore models by rotating and zooming, switch to wireframe mode, and customize colors for better visibility. This app offers a distraction-free viewing experience for checking models or print details on the go.

Instant STL file openingSmooth 3D model explorationRotate and zoom functionality
🔧 Utilities
(7)
free with in-app purchases
17
CADDaddy: CAD Viewer
CADDaddy: CAD Viewer
CADDaddy: CAD Viewer
Open almost any CAD file
$12.99
$19.99 | 35% OFF
📊 Productivity
(0)
18
思联三维看图-CAD看图纸
思联三维看图-CAD看图纸
思联三维看图-CAD看图纸
手机轻量化看stp/proe等3D模型
Free

View and share 3D models and 2D drawings on your mobile device without needing CAD software. Offers features like 3D measurement, model decomposition, and cross-platform data synchronization for collaborative projects.

Lightweight 3D model browsingSupports multiple 3D and 2D file formatsOnline 3D model format conversion
🔧 Utilities
(5)
free with in-app purchases
19
3D Model Viewer & Converter
3D Model Viewer & Converter
3D Model Viewer & Converter
STL,GLB,3MF,OBJ,DXF,USDZ ...
Free

This tool allows you to open, view, and convert a wide variety of 3D file formats on your Apple devices. It offers basic editing, cross-sectioning, and exploded views, with options for batch conversion and exporting projected views.

Import numerous 3D formatsConvert between popular 3D formatsBasic editing tools
📊 Productivity
(2)
freemium
20
CAD FastView: DWG Viewer
CAD FastView: DWG Viewer
CAD FastView: DWG Viewer
DWG,DXF,DWT Viewer -CAD viewer
Free

View, convert, and print CAD drawings on your mobile device. Supports DWG, DXF, and PDF formats with iCloud sync and Wi-Fi printing. Ideal for architects, engineers, and construction professionals.

Fast DWG/DXF viewingConvert drawings to PDFWi-Fi printing
📊 Productivity
(50)
freemium

FAQ about 3D Cad Model Viewer

What are the best 3d cad model viewer apps for iPhone?
3D CAD Model Viewer tops our 3d cad model viewer apps ranking as of August 2026, with a 3.3-star average from 13 App Store ratings, and it's free to download.
Yes — 19 of the top 3d cad model viewer apps we rank are free to download, including 3D CAD Model Viewer and ViewCAD:2D/3D CAD Model Viewer.
3D CAD Model Viewer has no ads and has no in-app purchases, according to its App Store listing as of August 2026.
We track 242+ 3d cad model viewer apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
3D CAD Model Viewer supports a wide range of formats including dwg, catia, x_t, stp, and igs files. This broad compatibility ensures you can work with most of your existing CAD data.
The application allows you to upload models into your app, suggesting offline access to previously uploaded files. However, initial file opening from cloud services like Dropbox or Google Drive would require an internet connection.