L5X File Format — Studio 5000 Logix Designer
Open L5X Files
in Your Browser
View ControlLogix and CompactLogix programs without a Studio 5000 license. Upload your L5X file and instantly browse ladder logic, tags, and AI explanations.
- L5X files are XML-based exports of Studio 5000 projects for ControlLogix and CompactLogix PLCs.
- You can open L5X files online without a Studio 5000 license using plc.company.
- L5X files contain ladder logic, tags, I/O configuration, UDTs, AOIs, and program structure.
- plc.company parses L5X files in seconds — no installation or Rockwell account required.
What is an L5X File?
L5X files are XML-based export files from Studio 5000 Logix Designer, Rockwell Automation's software for programming ControlLogix and CompactLogix PLCs. When you export a project from Studio 5000, you get an L5X file that contains the complete project in a portable, text-based format.
- Controller configuration and firmware settings
- All programs and routines — ladder, function block, structured text
- Controller-scoped and program-scoped tags
- User-Defined Data Types (UDTs) and Add-On Instructions (AOIs)
- I/O module configuration and address mapping
- Complete program structure and organization
Everything in Your
L5X File, Instantly
Ladder Logic Viewer
See all rungs with color-coded instructions. All 215+ instruction types identified at a glance without opening Studio 5000.
Complete Tag Browser
Browse every tag with data types, descriptions, and UDT structures. Search and filter across controller-scoped and program-scoped tags.
Plain-English Explanations
Get plain-English explanations of what each rung does. Useful for audits, knowledge transfer, and understanding unfamiliar code.
Cross-Reference & Signal Tracing
Find every location a tag is read or written across the entire project. Trace a signal from field device to output in seconds.
Program Structure Navigator
Browse tasks, programs, and routines in a tree. Understand how the project is organized before diving into logic.
Hardware Browser & Topology
View I/O modules, rack layout, catalog numbers, and point counts. See every device in the system without hardware access.
Safety & Alarm Analysis
Detect safety-critical rungs and alarm conditions. Full GuardLogix support with safety routine identification.
Program Comparison
Diff two L5X versions side by side. See exactly what changed between revisions — rungs added, modified, or removed.
Supported Controllers
Full-size Logix controllers. All versions 5530 through 5580 supported.
Compact modular Logix controllers. Perfect for space-constrained applications.
Safety-rated Logix controllers. Safety routines are fully parsed and labeled.
Start Viewing Your L5X File in Seconds
Drop your Studio 5000 export file and start viewing immediately
Drop your L5X file here
or browse to select
Also supports .ACD files (Studio 5000 native projects) and .RSS files (export formats).
How to Open L5X Files
Export your project from Studio 5000
In Studio 5000 Logix Designer, go to File > Export and select 'Export Program' or 'Export Controller'. Choose L5X as the format and save the file.
Navigate to PLC Company
Open your web browser and go to plc.company. No account or software installation required.
Upload your L5X file
Drag and drop your L5X file onto the upload area, or click to browse and select the file from your computer.
Browse your program
Instantly view your complete PLC program including ladder logic, tags, routines, and program structure - all without Studio 5000.
Frequently Asked Questions
Can I view L5X files without Studio 5000?
Yes! PLC Company lets you open and view L5X files without needing Studio 5000 installed. Browse programs, routines, tags, ladder logic, and get AI-powered explanations - all without expensive Rockwell software licenses.
Is there an affordable L5X viewer?
PLC Company offers L5X viewing at a fraction of Studio 5000's cost. There's no software to install and it works entirely in your browser. Simply upload your L5X file and instantly view your ControlLogix or CompactLogix program.
How do I open L5X files without Rockwell software?
Upload your L5X file to PLC Company at plc.company. The file is encrypted in transit and processed on secure infrastructure. You'll be able to browse the complete program structure, view ladder logic rungs, examine tags and data types, and understand the code with AI explanations.
What can I see in an L5X file without Studio 5000?
With PLC Company, you can see everything in the export: controller configuration, all programs and routines, ladder logic with color-coded instructions, structured text with syntax highlighting, controller and program tags, User-Defined Types (UDTs), and Add-On Instructions (AOIs).
Is my L5X file secure when viewing online?
Absolutely. Your L5X file is encrypted in transit and processed on isolated infrastructure. Your data is accessible only to your account and is never shared with third parties.
Does the viewer work with all ControlLogix versions?
Yes, PLC Company supports L5X exports from all Studio 5000 versions and all Logix controller families including ControlLogix 5570/5580, CompactLogix 5370/5380/5480, and GuardLogix safety controllers.
Start Viewing L5X Files Today
No Studio 5000 license required. No software to install. View your L5X files online right now.
Upload L5X File