Finding a "free hmi graphics library" is step one. Step two is making it work without breaking your runtime performance.
The XML/SVG Workflow: Most modern SCADA systems (Ignition, VTScada, WinCC Unified) support SVG natively.
Pro Tip: Free libraries rarely come with tag databases. You will need to manually alias your PLC addresses to the graphic's animation properties.
A completely free, production-ready, industrial-grade HMI graphics library does not exist as a single download. However, by combining Qt open-source framework, MIT‑licensed SVG icon sets, custom canvas drawing, and occasional GPL assets (for non‑commercial use), you can build a professional HMI at zero licensing cost. The trade-off is effort in assembling and testing the visual components.
For teams prioritizing time over budget, a low‑cost commercial library ($50–$300) remains the safer choice. For open‑source, education, or proof‑of‑concept projects, the free resources above are excellent.
Next action: Audit your HMI framework (C++/Python/C#/Web) → Download relevant free SVG set → Prototype one gauge or tank control using only vector drawing → Evaluate gaps before full implementation.
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Finding a high-quality free HMI graphics library is essential for creating modern, professional industrial interfaces without the high costs of proprietary symbol sets. Whether you are using Ignition, Wonderware, or FactoryTalk, leveraging open-source and free resources can significantly improve operator experience and system clarity. Top Sources for Free HMI Graphics
Open Automation Software (OAS): Provides a comprehensive library of Free HMI Graphics and HMI Symbols including high-quality renders of tanks, pipes, valves, and motors in multiple colors (red, green, blue, grey, yellow).
Opto 22 Image Library: A robust resource featuring SVG, PNG, and GIF animations. It includes editable SVG images for deep customization and animated elements for dynamic process visualization.
Generic Logic (Genlogic): Offers a Free Community Edition of its vector graphics library and HMI editor, suitable for deploying dynamic displays updating with live data.
VRT Systems: Noted for providing free industrial SVG libraries, particularly for network equipment and process industry symbols. General Graphic Repositories
While not strictly industrial, these platforms offer millions of icons that can be adapted for HMI use:
The Noun Project: Excellent for minimalist, high-contrast HMI Icons in SVG and PNG formats.
Flaticon & Freepik: Recommended for a massive variety of vector icons with flexible licensing.
Tibbixel: A specialized resource mentioned by developers for having over 25,000 free SVG files with commercial-use licenses. Tools for Custom HMI Design
If pre-made libraries don't fit your needs, many engineers use free design software to build their own professional assets:
Hmi symbol Vectors - Download Free High-Quality ... - Freepik free hmi graphics library
Hmi symbol Vectors - Download Free High-Quality Vectors from Freepik | Freepik. Creating HMI Graphics with Inkscape and SVG Libraries
Several providers offer high-quality, free HMI graphics libraries for industrial applications. These libraries typically include symbols for manufacturing, HVAC, and water treatment, such as pumps, valves, and tanks. Top Free HMI Graphics Libraries Opto 22 SVG and GIF Library : A comprehensive SVG and GIF Image Library featuring editable SVGs, GIFs, product images, and logos. Open Automation Software (OAS) : Provides a Free HMI Graphics Library
with common industry symbols rendered from multiple perspectives in various colors. Siemens HMI Symbol Library : Built directly into the TIA Portal
toolbox, this library includes standard industrial equipment symbols like fans and bars. AdvancedHMI
: A free, Visual Studio-based HMI software that includes its own visual component library for creating custom dashboards. How to Create and Manage Text in HMI
To display dynamic text (e.g., "Running" vs. "Stopped"), you can use Text Lists within your HMI software.
While there is no single academic "paper" that covers all free Human-Machine Interface (HMI) graphics libraries, current research and industrial documentation identify several prominent open-source and free resources. These libraries vary from simple symbol collections to complete graphical frameworks used in industrial automation and embedded systems. 1. Key Open-Source Graphical Frameworks
These libraries provide the code and rendering engines needed to build custom HMI applications.
Finding a high-quality "free HMI graphics library" can be a game-changer for industrial automation projects. Most professional libraries are bundled with expensive SCADA software, but several reputable standalone options exist for developers and integrators looking to build modern, professional interfaces without the licensing bloat. 1. Open Automation Software (OAS) Free HMI Graphics
This is one of the most popular "pure" graphics downloads available for free. It is specifically curated for industrial IoT and Industry 4.0 applications.
Content: High-quality symbols for manufacturing, HVAC, water/waste water, and general industrial use.
Pros: Rendered from multiple perspectives; available in red, green, blue, grey, and yellow.
Best For: Users who need a quick pack of standard symbols (pumps, tanks, valves) that look modern. Where to find: Available at Open Automation Software. 2. Opto 22 Free SVG Image Library
Opto 22 offers a comprehensive collection of Scalable Vector Graphics (SVG) specifically for their groov interfaces, but they are usable in any HMI that supports SVG.
Content: Over 100+ SVG images including field devices (pumps, compressors), process control equipment (conveyors, hoppers), and HVAC symbols.
Pros: SVGs are infinitely scalable without losing quality, making them perfect for high-resolution 4K displays or mobile interfaces.
Best For: Modern, web-based HMI development where resolution independence is critical. Where to find: Visit the Opto 22 Blog. 3. LVGL Open-Source Graphics Library Finding a "free hmi graphics library" is step one
For embedded HMI development (like custom C++ or Python interfaces), LVGL is the industry standard for open-source graphics.
Content: A full framework with widgets (gauges, charts, buttons) rather than just static icons.
Pros: Extremely lightweight and optimized for performance on microcontrollers; highly customizable.
Best For: Developers building their own HMI software from scratch for custom hardware.
Where to find: Documentation and source code on LVGL.io or NXP Semiconductors. 4. Software-Specific Free Tiers
Some industrial giants offer their full graphics libraries for free if you use their (limited) software versions:
Maple Systems (EBPro): This HMI configuration software is free to download and includes a massive library of 3,600+ symbols and 45+ screen components.
Ignition Maker Edition: For personal or educational use, Inductive Automation’s Ignition Maker Edition provides access to their world-class industrial graphics library for free. 5. General Vector Sites (Figma, IconScout, Freepik)
While not "industrial" by design, these platforms are increasingly used for modern flat-UI HMI design.
Several companies and open-source communities provide free HMI (Human-Machine Interface) graphics libraries
to help engineers build professional SCADA and PLC dashboards without starting from scratch. These resources typically include industrial symbols like pumps, valves, tanks, and motors in formats such as SVG, PNG, and GIF. Top Free HMI Graphics Libraries Opto 22 SVG & GIF Library : A comprehensive collection of editable SVGs
, product images, and animated GIFs specifically designed for control dashboards. These are accessible via the Opto 22 Image Library Open Automation Software (OAS) : Offers a free download of over 5,000 industrial symbols
, including HVAC, manufacturing conveyors, and chemical tanks. You can request the link through the OAS Free HMI Graphics page Siemens HMI Template Suite : Provides expertly designed templates and objects
for TIA Portal to speed up development and ensure a modern look for SIMATIC HMIs. Haiwell Standard Image Library : Includes specific icon packs for transformers, valves, reactors, and pumps , regularly updated as recently as April 2025. SVGHMI.pro : Features a modern SVG industrial widget library
with dedicated symbol packs for motors and other common hardware. General Purpose Icon & Vector Sites
If you need modern UI elements rather than specific industrial hardware, these sites offer high-quality HMI-compatible graphics: Hmi Vector Art, Icons, and Graphics for Free Download
Several reputable industrial automation companies offer free, high-quality HMI graphics libraries featuring SVGs, PNGs, and specialized symbols for manufacturing, HVAC, and process control. Recommended Free HMI Graphics Libraries Opto 22 SVG and GIF Library : A comprehensive collection of free SVGs, PNGs, and animated GIFs Pro Tip: Free libraries rarely come with tag databases
. It includes field devices like pumps, valves, and motors, plus HVAC equipment and process sensors. Siemens SIMATIC HMI Template Suite
: Provides expert-designed templates and high-quality icons specifically for TIA Portal and WinCC projects. Open Automation Software (OAS) : Offers a library of common industry symbols for HVAC, water/waste water, and industrial applications
. Symbols are available in multiple colors (red, green, blue, etc.) and perspectives. LVGL (Light and Versatile Graphics Library) : An open-source embedded graphics library
for creating modern GUIs on microcontrollers (MCUs) and MPUs. It is highly portable and MIT licensed DIY Design & Customization Tools
If you want to "make a piece" from scratch or modify existing graphics: SIMATIC HMI Template Suite
Finding high-quality, free Human-Machine Interface (HMI) graphics is essential for creating professional and intuitive control systems without high licensing costs. 🚀 Top Sources for Free HMI Graphics
These libraries offer specialized industrial symbols like pumps, valves, and tanks in various formats.
Open Automation Software (OAS): Offers over 5,000 industrial symbols including HVAC, manufacturing conveyors, and process equipment.
Opto 22 Image Library: A robust collection of editable SVGs, PNGs, and animated GIFs specifically designed for industrial dashboards.
AutomationDirect C-more: While tied to their programming software, the environment is free and includes a wide array of graphical objects for PLCs.
OSHMI (Open Substation HMI): An open-source project providing a comprehensive ZIP file of SVG clipart tailored for electrical substations and industrial use. 🎨 General Purpose Icon Libraries
If you need modern, flat, or minimalist UI elements (like settings gears, user icons, or home buttons), these general sites are excellent: Download svg-clipart.zip (OSHMI - Open Substation HMI)
Date: [Current Date]
Subject: Evaluation of freely available graphics resources for Human-Machine Interface (HMI) development
Prepared for: Engineering / R&D Team
Standard icon sets often lack the specific symbols required for SCADA, PLCs, and industrial automation (P&ID symbols).
Not all free libraries are created equal. Some require attribution; others are truly public domain. Here are the best sources for industrial assets.
You may find that a pure free HMI graphics library lacks niche components (e.g., a specific model of a VFD or a bottling line capping machine).
Use the free library as a template layer. Take a generic "Motor" SVG from a free pack, duplicate it, and overlay a PNG of your specific motor brand. In many jurisdictions, this "derivative work" remains covered by the original free license.