Best G-Code Viewer & Converter Apps

228+ iOS apps curated and reviewed

4.4 avg rating
19 free apps
Updated July 2026

Finding the right g-code viewer & converter apps can be overwhelming with so many options. We've analyzed 228+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top G-Code Viewer & Converter Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Sequence :: G-Code editor, CNCSequence :: G-Code editor, CNCFree4.2★ (62)NoYesJul 2026
2GCode Scanner & STL ViewerGCode Scanner & STL ViewerFree5.0★ (2)NoYesJul 2026
3G Code ConverterG Code ConverterFreeNoNoMay 2026
4G-Code Viewer & ConverterG-Code Viewer & Converter$1.99 was $2.993.0★ (2)NoNoJul 2026
5DWG FastView-CAD Viewer&EditorDWG FastView-CAD Viewer&EditorFree4.4★ (1K)YesYesJul 2026
63D File Viewer: OBJ STP & more3D File Viewer: OBJ STP & moreFree4.5★ (35)YesYesJul 2026
7Documents: 파일 리더 & 뮤직 플레이어Documents: 파일 리더 & 뮤직 플레이어Free4.8★ (617K)NoYesJul 2026
8конвертер векторной графики □конвертер векторной графики □Free4.6★ (4.8K)NoYesJul 2026

Top Picks for G-Code Viewer & Converter

Sequence :: G-Code editor, CNC#1

Sequence :: G-Code editor, CNC by Hypercube GFX, Inc.

Machining, CAD Modeling, CAM
Editor's Choice
🎨 Graphics & Design
4.2(62 ratings)
FreeIn-App Purchases
Sequence :: G-Code editor, CNC screenshot 1
Sequence :: G-Code editor, CNC screenshot 2
Sequence :: G-Code editor, CNC screenshot 3
Sequence :: G-Code editor, CNC screenshot 4
Sequence :: G-Code editor, CNC screenshot 5

This app is a text editor for G-Code and M-Code, designed for machining on CNC and lathe machines. It allows users to import, save, and visualize STL models with a built-in 3D renderer. Subscriptions are available and can be canceled anytime.

GCode Scanner & STL Viewer#2

GCode Scanner & STL Viewer by Jeremiah Moore

Interpret CNC machine code
Strong Contender
🔧 Utilities
5.0(2 ratings)
FreeIn-App Purchases
GCode Scanner & STL Viewer screenshot 1
GCode Scanner & STL Viewer screenshot 2
GCode Scanner & STL Viewer screenshot 3
GCode Scanner & STL Viewer screenshot 4
GCode Scanner & STL Viewer screenshot 5
GCode Scanner & STL Viewer screenshot 6

This tool allows users to view and simulate CNC machine code (G-code) and 3D model files (STL) before production. It helps prevent errors, save tools, and reduce setup times for machinists, programmers, and engineers.

More G-Code Viewer & Converter apps to explore

4
G-Code Viewer & Converter
G-Code Viewer & Converter
G-Code Viewer & Converter
for GCODE, CNC, NGC, NC files
$1.99
$2.99 | 33% OFF

Easily view and convert CNC machine code files on your mobile device. Supports various export formats like PDF, SVG, DXF, and IGES. Load files directly from compressed archives for convenient access.

View GCODE, CNC, CN & NGC filesExport to PDF, SVG, DXF, IGESLoad from ZIP or RAR files
📊 Productivity
(2)
paid
5
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
6
3D File Viewer: OBJ STP & more
3D File Viewer: OBJ STP & more
3D File Viewer: OBJ STP & more
STP STL OBJ FBX GLTF & More
Free

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.

Supports over 20 3D file formatsFast and smooth 3D file viewingZoom, rotate, and pan with touch controls
🔧 Utilities
(35)
free with in-app purchases
7
Documents: 파일 리더 & 뮤직 플레이어
Documents: 파일 리더 & 뮤직 플레이어
Documents: 파일 리더 & 뮤직 플레이어
비디오 및 음악 플레이어 | 파일 브라우저
Free

This app is a comprehensive file manager and document editor for mobile devices. It allows users to organize, edit, convert, and annotate various file types, including PDFs, Office documents, and audio/video files. It also features transcription, scanning, and cloud integration.

Edit PDFs directlyConvert files to PDFOrganize files and folders
📊 Productivity
(617K)
free with in-app purchases
8
конвертер векторной графики □
конвертер векторной графики □
конвертер векторной графики □
Преобразовать в SVG и EPS
Free

Easily convert files to various vector and image formats like SVG, EPS, and PDF. Select your input, choose an output, and convert in seconds. Save, share, or open converted files directly from the app.

Convert to SVG, EPS, PDF, PNG, JPG, and moreSupports dozens of input formatsFast conversion (under 15 seconds)
🔧 Utilities
(4.8K)
freemium
9
Acrobat Reader: PDF Editor
Acrobat Reader: PDF Editor
Acrobat Reader: PDF Editor
Documents Editor & Converter
Free

This app is a powerful PDF tool for viewing, editing, annotating, and signing documents. It offers AI-powered features for summarizing and interacting with PDFs, along with robust conversion and security options. Collaborate on files and access your documents from anywhere.

View, edit, and annotate PDFsSign and fill PDF formsConvert files to and from PDF
💼 Business
(632K)
freemium
10
Koder Code Editor
Koder Code Editor
Koder Code Editor
(S)FTP, Dropbox, Webdav, SSH
Free

A powerful code editor for mobile devices, offering syntax highlighting for over 80 languages, remote file access, and a built-in terminal. Perfect for developers who need to code on the go with a well-designed interface.

Syntax highlighting for 80+ languagesRemote file access (SFTP, Dropbox, WebDAV)Built-in SSH client
🛠️ Developer Tools
(9.3K)
paid
11
The Document Converter
The Document Converter
The Document Converter
Convert to PDF, DOCX, JPG, etc
Free

Effortlessly transform files into various document and image formats like PDF, DOCX, and JPG. Simply select your input, choose the desired output, and convert in seconds. Save, share, or open your converted files directly in other applications.

Convert to PDF, DOCX, JPG, TXT, and moreSupports dozens of input formatsSave, share, or open converted files
🔧 Utilities
(5.9K)
freemium
12
PDF Expert: Editor & Converter
PDF Expert: Editor & Converter
PDF Expert: Editor & Converter
Edit, Sign, Convert Documents
Free

This app allows you to edit, annotate, fill out forms, and convert PDF documents. It offers AI-powered summarization and analysis, along with tools to merge, sign, and protect your files. Work seamlessly across Apple devices with a user-friendly interface.

Edit PDF text and imagesAnnotate and highlight PDFsFill out PDF forms
📊 Productivity
(215K)
free with in-app purchases
13
Google Docs
Google Docs
Google Docs
Edit Documents and Collaborate
Free

Create, edit, and collaborate on documents online in real time. Work together seamlessly with your team, even offline, and access a variety of file types. AI-powered features can help draft and refine content.

Real-time collaborationOffline editingTemplate library
📊 Productivity
(3.2M)
freemium
14
Photo & Image Converter
Photo & Image Converter
Photo & Image Converter
Resizer & convert files bulk
Free

Easily convert and resize images and files on your iOS device. Supports a vast array of formats for both online and offline conversions, with batch processing capabilities. All converted files are conveniently saved in Apple's Files app.

Image conversionFile conversionImage resizing
📊 Productivity
(491)
free with in-app purchases
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
(325)
free with in-app purchases
16
STEP File Viewer
STEP File Viewer
STEP File Viewer
View & Explore STEP/IGES
Free

View and interact with 3D CAD files like STEP and IGES. Inspect internal geometry, measure dimensions, and export models in various formats. Ideal for engineers, designers, and students needing to visualize complex designs without expensive software.

3D model viewing with pan, zoom, and rotateSolid, shaded, and wireframe display modesMeasure dimensions and features
🛠️ Developer Tools
(3)
free with in-app purchases
17
iEditor – Text Code Editor
iEditor – Text Code Editor
iEditor – Text Code Editor
Best source code editor
Free

A fast and simple text and source code editor for iPhone and iPad. It allows users to create, import, edit, and manage various file types with features like syntax highlighting, search/replace, and export options.

Create and import text/source code filesSyntax highlighting for C, Java, HTMLSearch and replace functionality
📊 Productivity
(179)
ad-supported
18
File Viewer
File Viewer
File Viewer
by Sharpened Productions
Free

Easily open and view over 100 different file types, including documents, images, videos, and archives. Browse files stored on your device or in iCloud Drive. This app also identifies unknown files and displays detailed file information.

Open 100+ file typesBrowse device and iCloud DriveBuilt-in readers for Office, PDF, and images
🔧 Utilities
(5)
free
19
WPS Office-AI Doc, PDF, Sheet
WPS Office-AI Doc, PDF, Sheet
WPS Office-AI Doc, PDF, Sheet
Office Suite with PDF Editor
Free

This AI-powered office suite transforms your device into a smart workspace. Generate presentations from prompts, digitize notes, and analyze documents with an intelligent assistant. Seamlessly sync across devices for efficient workflow.

AI-powered document analysis and summarizationInstant presentation creation from promptsOCR for digitizing notes and business cards
📊 Productivity
(18K)
subscription
20
GIF Maker - Memes & GIFs
GIF Maker - Memes & GIFs
GIF Maker - Memes & GIFs
Gif Creator & Live Gif Editor
Free

Create and edit animated GIFs, Boomerangs, and memes with AI assistance. Convert videos and photos to GIFs, swap faces, add text, and apply filters. Share your creations across social media platforms.

AI GIF generation from textVideo and photo to GIF conversionFace swapping with AI
🔧 Utilities
(88K)
free with in-app purchases

FAQ about G-Code Viewer & Converter

What are the best g-code viewer & converter apps for iPhone?
Sequence :: G-Code editor, CNC tops our g-code viewer & converter apps ranking as of July 2026, with a 4.2-star average from 62 App Store ratings, and it's free to download.
Yes — 19 of the top g-code viewer & converter apps we rank are free to download, including Sequence :: G-Code editor, CNC and GCode Scanner & STL Viewer.
Sequence :: G-Code editor, CNC has no ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 228+ g-code viewer & converter apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
Sequence is a text editor specifically designed for editing G-Code and M-Code for machining on CNC and lathe machines. It also supports importing, saving, and visualizing STL models.
Sequence is available for both iPhone and iPad devices, making it accessible for users on the go or in the workshop.