No licensing fees or recurring subscription costs, allowing for re-allocation of budget to hardware or project functionality.
: High-resolution PNGs can slow down some embedded HMI hardware. Optimized SVGs or simple 2D graphics generally offer the best performance.
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
With these criteria in mind, let us explore the best free HMI graphics libraries and resources available today. free hmi graphics library
: Offers a vector graphics engine and HMI editor specifically for developers working in Visual Studio or web environments like React and Angular.
: Provides a comprehensive collection of SVG symbols for air conditioning, motors, pumps, and chemical processes, designed for dynamic manipulation like changing colors or tank levels on-the-fly.
For microcontrollers with low RAM/Flash (like ARM Cortex-M), LVGL is the best choice. For Raspberry Pi or industrial PCs, Qt or AdvancedHMI is superior 1.2.6. No licensing fees or recurring subscription costs, allowing
Microcontrollers (MCU), ESP32, STM32, ARM-based embedded systems 1.2.6 .
| Scenario | Recommended approach | |----------|----------------------| | (e.g., for Raspberry Pi) | Qt + OpenSCADA widgets + Material SVG icons (MIT) | | Commercial HMI device (no license fee for graphics) | Use MIT/CC0 icon sets only; code custom controls using basic shapes (no GPL assets) | | Web‑based HMI | Apache ECharts for gauges + FontAwesome + custom SVG mimic (Inkscape) | | Rapid prototype | HMI Project (GitHub) or ModernUI for WinForms (free) | | No time for DIY | Purchase affordable commercial library (e.g., Industrial Graphics from CodeProject, ~$50) – outside “free” scope, but practical |
with dedicated symbol packs for motors and other common hardware. General Purpose Icon & Vector Sites : Provides a comprehensive collection of SVG symbols
Many libraries include multi-state graphics (e.g., green for running, red for stopped, yellow for alarm). Top Free HMI Graphics Libraries and Resources 1. Automation Vendor Ecosystems (Built-in & Free Add-ons)
: Mix-and-matching styles (e.g., 2D flat icons with 3D glossy buttons) can make an interface feel cluttered. Choose one library and stick to its visual language. Performance
Support for standard protocols and visual conventions (e.g., ISA-101).