Best Free Stl Viewer Apps

205+ iOS apps curated and reviewed

4.1 avg rating
20 free apps
Updated July 2026

With an average user rating of 4.1★, the free stl viewer category is one of the App Store's strongest. Browse all 205+ apps we track, sorted so the most loved ones surface first.

Top Picks for Free Stl Viewer

Quick STL Viewer#1

Quick STL Viewer by KEAT MEN TANG

Editor's Choice
🔧 Utilities
4.9(7 ratings)
FreeIn-App Purchases
Quick STL Viewer screenshot 1
Quick STL Viewer screenshot 2
Quick STL Viewer screenshot 3
Quick STL Viewer screenshot 4

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.

STL Simple Viewer#2

STL Simple Viewer by Victor Bovio

Quickly view 3D STL CAD models
Strong Contender
📊 Productivity
4.3😞(847 ratings)
FreeAdsIn-App Purchases
STL Simple Viewer screenshot 1
STL Simple Viewer screenshot 2
STL Simple Viewer screenshot 3
STL Simple Viewer screenshot 4

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.

What We Love

  • 🚀 Simple and intuitive viewer
  • 👍 Useful viewing options
  • 💡 Supports multiple file formats

Room to Improve

  • 🐛 Frequent crashes
  • 🔋 High battery consumption
  • 🚨 Excessive and intrusive ads
3D File Viewer: OBJ STP & more#3

3D File Viewer: OBJ STP & more by Andeesh Mehdi Syed

STP STL OBJ FBX GLTF & More
Worth Considering
🔧 Utilities
4.5(35 ratings)
FreeAdsIn-App Purchases
3D File Viewer: OBJ STP & more screenshot 1
3D File Viewer: OBJ STP & more screenshot 2
3D File Viewer: OBJ STP & more screenshot 3

Easily open and explore 3D model files on your iPhone or iPad. Supports over 20 popular formats, offering smooth viewing with intuitive touch controls. Ideal for designers, engineers, architects, and students working with 3D data.

More Free Stl Viewer apps to explore

4
STL Master
STL Master
STL Master
STL File Viewer + AR & Sharing
Free

View and interact with 3D models in augmented reality. Share instant screenshots and screen recordings of your designs directly from the app.

STL file viewingAugmented reality (AR) modeInstant screenshots
🔧 Utilities
(49)
free
5
STL File Viewer Pro
STL File Viewer Pro
STL File Viewer Pro
Simplest Way To View STL Files
Free

Easily view, rotate, and inspect 3D STL files on your iPhone or iPad. Load models instantly from various sources for 3D printing, design review, or engineering inspection.

Instant STL file loadingFull 360° rotation and zoomSharp detail rendering
🛠️ Developer Tools
(50)
free with in-app purchases
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
(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
(325)
free with in-app purchases
8
exocad webview
exocad webview
exocad webview
Fast STL 3D Viewer
Free

This free 3D viewer allows you to quickly load and inspect various 3D model file formats on any mobile device. It supports common open formats and offers intuitive controls for adjusting transparency, rotation, and shading. Specialized features are available for dental professionals using specific software.

Load various 3D model formats (STL, OBJ, PLY, etc.)Intuitive touch controlsAdjust mesh transparency and shading
🔧 Utilities
(14)
free
9
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
(4)
free with in-app purchases
10
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
(1)
freemium
11
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
(325)
free with in-app purchases
12
STL Viewer · Model File Reader
STL Viewer · Model File Reader
STL Viewer · Model File Reader
Fast STL File View & 3D Reader
Free

Quickly view and interact with 3D model files. Rotate, zoom, and project models into your environment using augmented reality. Offers customization options and multi-model support.

Fast STL file viewing3D model rotation and zoomAugmented Reality (AR) projection
📊 Productivity
(2)
free with in-app purchases
13
STL & 3D Model Viewer - Mes3D
STL & 3D Model Viewer - Mes3D
STL & 3D Model Viewer - Mes3D
Supports STL, GLB, OBJ, USDZ
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
🔧 Utilities
(1)
free
14
Open3D: STL & 3D Model Viewer
Open3D: STL & 3D Model Viewer
Open3D: STL & 3D Model Viewer
Free GLB FBX STL OBJ Viewer
Free
🎨 Graphics & Design
(0)
15
AutoCAD
AutoCAD
AutoCAD
DWG Viewer & Editor
Free

Access and edit CAD drawings on the go with this official application. It provides essential drafting and design tools for creating, updating, and sharing 2D drawings from any device. Collaborate with teams and simplify workflows by accessing files from various cloud storage services.

2D file viewingCreate, edit, and share 2D drawingsOffline work and sync
📊 Productivity
(6.3K)
freemium
16
iRhino 3D
iRhino 3D
iRhino 3D
3D Viewer & Scanner
Free

View and present 3D models from Rhino 3D on your iPhone or iPad. Navigate models with intuitive touch gestures, load files from various sources, and visualize them in augmented reality. Includes a markup tool for annotations.

3D model viewingTouch navigation (pan, zoom, orbit)Cloud storage integration
📊 Productivity
(72)
free
17
myTextViewer
myTextViewer
myTextViewer
Any File Viewer: Code/Log/Text
Free

Instantly open and view any text, code, or log file. This app offers professional syntax highlighting and line numbers, making it ideal for professionals who need to access and read various file formats on the go. It supports numerous common file types and provides customizable viewing themes.

Open any text, code, or log fileSyntax highlighting for common formatsLine numbers display
📊 Productivity
(146)
free
18
STL Viewer: 3D Model & Print
STL Viewer: 3D Model & Print
STL Viewer: 3D Model & Print
View, measure & export 3D STL
Free
🔧 Utilities
(0)
19
3D Viewer by Chief Architect
3D Viewer by Chief Architect
3D Viewer by Chief Architect
by Chief Architect
Free

Explore 3D architectural models in virtual reality. Navigate through home designs with intuitive controls, experiencing them before construction. Ideal for professionals to share immersive project previews with clients.

Virtual reality navigationWalk and fly through designsExterior, room, and floor plan views
📊 Productivity
(490)
free
20
Winmail Viewer - Letter Opener
Winmail Viewer - Letter Opener
Winmail Viewer - Letter Opener
Open Email, MSG & XPS files
Free

Easily open and view Winmail.dat, MSG, and XPS email files that are incompatible with most email clients. Convert embedded content like appointments and notes into native iOS formats, and access all attachments within these files.

Open Winmail.dat, MSG, and XPS filesConvert appointments, notes, and contactsAccess all attachments
🔧 Utilities
(4.5K)
free with in-app purchases