File → Open (or drag image into window).
Most standard desktop monitors and smartphones use (24-bit True Color). This format uses 8 bits each for Red, Green, and Blue, resulting in 16.7 million possible colors. Embedded microcontrollers face severe constraints: Memory Limits : An RGB888 image requires 3 bytes per pixel.
Select this if you want to include the image directly in your Arduino sketch (useful for small icons). 4. Conversion Click "Convert." The tool will output the converted file. 5. Displaying on TFT (Example)
The v2.3 update brought several stability improvements and workflow enhancements that make it the preferred choice for developers: imageconverter 565 v2.3
: You must manually resize your image to the exact dimensions of your display (e.g., 320x240 pixels) before conversion, as the tool does not include a resizer.
#include extern unsigned int myImage[0x12C00]; // 320x240 = 76800 pixels = 0x12C00 // ... setup and initialize display ... myGLCD.drawBitmap(0, 0, 320, 240, myImage); Use code with caution. Copied to clipboard Pro-Tips for Better Images A
A more modern desktop utility for C/C++ graphics. Troubleshooting File → Open (or drag image into window)
[Standard Image] (24-bit PNG/JPG) │ ▼ (Processed via ImageConverter 565 v2.3) [Raw C Array / .raw File] (16-bit RGB565) │ ▼ (Direct Flash Memory Access) [TFT/LCD Display] (Instantaneous Rendering) What is RGB565 and Why Does it Matter?
An online tool specifically for Arduino TFT libraries that supports multiple formats and optimization.
#include // Initialize display (Model, RS, WR, CS, RST) UTFT myGLCD(ILI9341_16, 38, 39, 40, 41); extern unsigned short myGraphic[22801]; // Reference your converted array void setup() myGLCD.InitLCD(); // Draw the image at X=10, Y=10, using its native width/height myGLCD.drawBitmap(10, 10, 151, 151, myGraphic); void loop() {} Use code with caution. ⚠️ Important Troubleshooting and Optimization Tips 1. Dealing with Massive Code Files Conversion Click "Convert
Whether you are a seasoned firmware engineer optimizing for a mass-produced device or a hobbyist building your first Arduino weather station, this tool can save you hours of manual data formatting. It allows you to focus on what truly matters: .
Outputs a .c or .h file containing a const unsigned short array, ideal for drawBitmap functions.
While ImageConverter 565 v2.3 is highly efficient, there are modern alternatives and online tools that offer similar, if not improved, functionality:
: 6 bits (64 levels) — human eyes are more sensitive to green. Blue : 5 bits (32 levels)
is a specialized utility developed by Rinky-Dink Electronics designed to convert standard image files (like .BMP, .PNG, or .JPG) into high-performance data arrays for use with microcontrollers like Arduino and chipsets such as the TTGO . It is particularly popular among hobbyists and engineers working with small TFT/LCD screens that require the RGB565 color format. Key Functions and Features