Best Free Stl Viewer Apps

249+ iOS apps curated and reviewed

4.6 avg rating
19 free apps
Updated October 2026

With an average user rating of 4.6★, the free stl viewer category is one of the App Store's strongest. Browse all 249+ apps we track, sorted so the most loved ones surface first.

Compare top Free Stl Viewer Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1STL Simple ViewerSTL Simple ViewerFree4.3★ (923)YesYesNov 2026
2Open3D: STL & 3D Model ViewerOpen3D: STL & 3D Model ViewerFree4.8★ (24)YesNoOct 2026
3Quick STL ViewerQuick STL ViewerFree4.9★ (12)NoYesOct 2026
4Ad-free STL ViewerAd-free STL ViewerFree—NoYesSep 2026
53D File Viewer: OBJ STP & more3D File Viewer: OBJ STP & moreFree4.4★ (54)NoYesOct 2026
6STL File Viewer ProSTL File Viewer ProFree4.5★ (81)YesYesOct 2026
7Meshly: STL ViewerMeshly: STL ViewerFree—NoYesOct 2026
8STL Viewer: 3D Model & PrintSTL Viewer: 3D Model & PrintFree—NoYesOct 2026

Top Picks for Free Stl Viewer

STL Simple Viewer#1

STL Simple Viewer by Victor Bovio

View STL, 3MF & DXF 3D models
Editor's Choice
📊 Productivity
4.3😞(920 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
  • 🔍 Limited functionality for larger files
Open3D: STL & 3D Model Viewer#2

Open3D: STL & 3D Model Viewer by Rajesh Konatala

View STL, GLB, STEP, DXF & OBJ
Strong Contender
🎨 Graphics & Design
4.8(24 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

View and edit a wide range of 3D model file formats directly on your device. Inspect models for 3D printing, convert between formats, and even view them in augmented reality. All processing is done locally, ensuring your files remain private.

Quick STL Viewer#3

Quick STL Viewer by KEAT MEN TANG

Clean 3D Model Viewer
Worth Considering
🔧 Utilities
4.9(12 ratings)
FreeIn-App Purchases
Quick STL Viewer screenshot 1
Quick STL Viewer screenshot 2
Quick STL Viewer screenshot 3
Quick STL Viewer screenshot 4

Easily open and preview 3D STL files in a smooth, responsive environment. Inspect models with rotation, zoom, and wireframe modes. Customize colors for better visibility without needing an account.

More Free Stl Viewer apps to explore

FAQ about Free Stl Viewer

What are the best free stl viewer apps for iPhone?
STL Simple Viewer tops our free stl viewer apps ranking as of October 2026, with a 4.3-star average from 923 App Store ratings, and it's free to download.
STL Simple Viewer shows ads and offers in-app purchases, according to its App Store listing as of October 2026.
We track 249+ free stl viewer apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.