diff --git a/imageconvert/make_png_convert b/imageconvert/make_png_convert
new file mode 100644
index 0000000..6a2f3bd
--- /dev/null
+++ b/imageconvert/make_png_convert
@@ -0,0 +1,41 @@
+#
+# Define PNG_ROOT to point to the location of the PNGdec library
+#
+PNG_ROOT = /Users/laurencebank/Documents/Arduino/libraries/PNGdec/src
+
+all: pngconvert
+CFLAGS = -D__LINUX__ -I $(PNG_ROOT) -Wall -O2
+
+pngconvert: png_main.o PNGdec.o adler32.o crc32.o infback.o inffast.o inflate.o inftrees.o zutil.o
+	$(CC) png_main.o PNGdec.o adler32.o crc32.o infback.o inffast.o inflate.o inftrees.o zutil.o -o pngconvert
+	strip $@
+
+png_main.o: png_main.cpp
+	$(CXX) $(CFLAGS) -c png_main.cpp
+
+PNGdec.o: $(PNG_ROOT)/PNGdec.cpp $(PNG_ROOT)/png.inl $(PNG_ROOT)/PNGdec.h
+	$(CXX) $(CFLAGS) -c $(PNG_ROOT)/PNGdec.cpp
+
+adler32.o: $(PNG_ROOT)/adler32.c
+	$(CC) $(CFLAGS) -c $(PNG_ROOT)/adler32.c
+
+crc32.o: $(PNG_ROOT)/crc32.c
+	$(CC) $(CFLAGS) -c $(PNG_ROOT)/crc32.c
+
+infback.o: $(PNG_ROOT)/infback.c
+	$(CC) $(CFLAGS) -c $(PNG_ROOT)/infback.c
+
+inffast.o: $(PNG_ROOT)/inffast.c
+	$(CC) $(CFLAGS) -c $(PNG_ROOT)/inffast.c
+
+inflate.o: $(PNG_ROOT)/inflate.c
+	$(CC) $(CFLAGS) -c $(PNG_ROOT)/inflate.c
+
+inftrees.o: $(PNG_ROOT)/inftrees.c
+	$(CC) $(CFLAGS) -c $(PNG_ROOT)/inftrees.c
+
+zutil.o: $(PNG_ROOT)/zutil.c
+	$(CC) $(CFLAGS) -c $(PNG_ROOT)/zutil.c
+
+clean:
+	rm -rf *.o pngconvert
diff --git a/imageconvert/png_main.cpp b/imageconvert/png_main.cpp
new file mode 100644
index 0000000..c0e965f
--- /dev/null
+++ b/imageconvert/png_main.cpp
@@ -0,0 +1,216 @@
+//
+// PNG to Group5 Image Compressor tool
+// Written by Larry Bank
+// Copyright (c) 2025 BitBank Software, Inc.
+//
+#include <stdio.h>
+#define MAX_IMAGE_FLIPS 256
+#include "../src/Group5.h"
+#include "../src/g5enc.inl"
+#include "PNGdec.h"
+
+PNG png; // static instance of class
+
+//
+// Create the comments and const array boilerplate for the hex data bytes
+//
+void StartHexFile(FILE *f, int iLen, int w, int h, const char *fname)
+{
+    int i;
+    char szTemp[256];
+    fprintf(f, "//\n// Created with imageconvert, written by Larry Bank\n");
+    fprintf(f, "// %d x %d x 1-bit per pixel\n", w, h);
+    fprintf(f, "// compressed image data size = %d bytes\n//\n", iLen);
+    strcpy(szTemp, fname);
+    i = strlen(szTemp);
+    if (szTemp[i-2] == '.') szTemp[i-2] = 0; // get the leaf name for the data
+    fprintf(f, "const uint8_t %s[] = {\n", szTemp);
+} /* StartHexFile() */
+//
+// Add N bytes of hex data to the output
+// The data will be arranged in rows of 16 bytes each
+//
+void AddHexBytes(FILE *f, void *pData, int iLen, int bLast)
+{
+    static int iCount = 0; // number of bytes processed so far
+    int i;
+    uint8_t *s = (uint8_t *)pData;
+    for (i=0; i<iLen; i++) { // process the given data
+        fprintf(f, "0x%02x", *s++);
+        iCount++;
+        if (i < iLen-1 || !bLast) fprintf(f, ",");
+        if ((iCount & 15) == 0) fprintf(f, "\n"); // next row of 16
+    }
+    if (bLast) {
+        fprintf(f, "};\n");
+    }
+} /* AddHexBytes() */
+//
+// The user passed a file with the wrong bit depth (not 1)
+// convert to 1-bpp by converting each color to 0 or 1 based on the gray level
+//
+void ConvertTo1Bpp(uint8_t *pBMP, int w, int h, int iBpp, uint8_t *palette)
+{
+    int g, x, y, iDelta, iPitch, iDestPitch;
+    uint8_t *s, *d, *pPal, u8, count;
+
+    iPitch = (w * iBpp)/8;
+    iPitch = (iPitch + 3) & 0xfffc;
+    iDestPitch = (w+7)/8;
+    iDestPitch = (iDestPitch + 3) & 0xfffc; // round to nearest "DWORD"
+    iDelta = iBpp/8;
+    for (y=0; y<h; y++) {
+        s = &pBMP[iPitch * y];
+        d = &pBMP[iDestPitch * y]; // overwrite the original data as we change it
+        count = 8; // bits in a byte
+        u8 = 0; // start with all black
+        for (x=0; x<w; x++) { // slower code, but less code :)
+            u8 <<= 1;
+            switch (iBpp) {
+                case 24:
+                case 32:
+                    g = (s[0] + s[1]*2 + s[2])/4; // gray value
+                    s += iDelta;
+                    break;
+                case 16:
+                    g = s[1] & 0xf8; // red
+                    g += ((s[0] | s[1] << 8) << 2) & 0x1f0; // green x 2
+                    g += (s[0] << 3) & 0xf8; // blue
+                    g /= 4;
+                    s += 2;
+                    break;
+                case 8:
+                    pPal = &palette[s[0] * 4];
+                    g = (pPal[0] + pPal[1]*2 + pPal[2])/4;
+                    s++;
+                    break;
+                case 4:
+                    if (x & 1) {
+                        pPal = &palette[(s[0] & 0xf) * 4];
+                        g = (pPal[0] + pPal[1]*2 + pPal[2])/4;
+                        s++;
+                    } else {
+                        pPal = &palette[(s[0]>>4) * 4];
+                        g = (pPal[0] + pPal[1]*2 + pPal[2])/4;
+                    }
+                    break;
+            } // switch on bpp
+            if (g >= 128) u8 |= 1; // white
+            count--;
+            if (count == 0) { // byte is full, move on
+                *d++ = u8;
+                u8 = 0;
+                count = 8;
+            }
+        } // for x
+    } // for y
+} /* ConvertTo1Bpp() */
+
+int main(int argc, const char * argv[]) {
+    int w, h, y, i, rc, bpp;
+    uint8_t *s, *pOut, *pData;
+    int iPitch, iOutSize, iDataSize;
+    FILE *ihandle;
+    uint8_t *pPalette;
+    G5ENCIMAGE g5enc;
+    BB_BITMAP bbbm;
+    int bHFile; // flag indicating if the output will be a .H file of hex data
+    
+    printf("PNG to Group5 image conversion tool\n");
+    if (argc != 3) {
+        printf("Usage: ./pngconvert <PNG image> <g5 compressed image>\n");
+        return -1;
+    }
+    pOut = (uint8_t *)argv[2] + strlen(argv[2]) - 1;
+    bHFile = (pOut[0] == 'H' || pOut[0] == 'h'); // output an H file?
+    ihandle = fopen(argv[1],"rb"); // open input file
+    if (ihandle == NULL)
+    {
+        fprintf(stderr, "Unable to open file: %s\n", argv[1]);
+        return -1; // bad filename passed
+    }
+    fseek(ihandle, 0L, SEEK_END); // get the file size
+    iDataSize = (int)ftell(ihandle);
+    fseek(ihandle, 0, SEEK_SET);
+    pData = (uint8_t *)malloc(iDataSize);
+    fread(pData, 1, iDataSize, ihandle);
+    fclose(ihandle);
+    
+    rc = png.openRAM(pData, iDataSize, NULL);
+    if (rc == PNG_SUCCESS) {
+        w = png.getWidth();
+        h = png.getHeight();
+        printf("image specs: (%d x %d), %d bpp, pixel type: %d\n", w, h, png.getBpp(), png.getPixelType());
+        png.setBuffer((uint8_t *)malloc(png.getBufferSize()));
+        rc = png.decode(NULL, 0); //PNG_CHECK_CRC);
+        png.close();
+        if (rc != PNG_SUCCESS) {
+             printf("Error decoding PNG file = %d\n", rc);
+             free(png.getBuffer());
+             return -1;
+        }
+        i = 1;
+        pPalette = NULL;
+        switch (png.getPixelType()) {
+            case PNG_PIXEL_INDEXED:
+            case PNG_PIXEL_GRAYSCALE:
+                if (png.getPixelType() == PNG_PIXEL_INDEXED) {
+                    pPalette = png.getPalette();
+                }
+                i = 1;
+                bpp = png.getBpp();
+                break;
+            case PNG_PIXEL_TRUECOLOR:
+                i = 3;
+                bpp = 24;
+                break;
+            case PNG_PIXEL_TRUECOLOR_ALPHA:
+                i = 4;
+                bpp = 32;
+                break;
+        } // switch
+        if (bpp != 1) { // need to convert it to 1-bpp
+            printf("Converting from %d-bpp to 1-bpp\n", bpp);
+            ConvertTo1Bpp(png.getBuffer(), w, h, bpp, pPalette);
+        }
+    iPitch = (w+7) >> 3;
+    pOut = (uint8_t *)malloc(iPitch * h);
+    s = png.getBuffer();
+    rc = g5_encode_init(&g5enc, w, h, pOut, iPitch * h);
+    for (y=0; y<h && rc == G5_SUCCESS; y++) {
+        rc = g5_encode_encodeLine(&g5enc, s);
+        s += iPitch;
+    }
+    if (rc == G5_ENCODE_COMPLETE) {
+        FILE *f;
+        iOutSize = g5_encode_getOutSize(&g5enc);
+        printf("Input data size:  %d bytes, compressed size: %d bytes\n", iPitch*h, iOutSize);
+        printf("Compression ratio: %2.1f:1\n", (float)(iPitch*h) / (float)iOutSize);
+        bbbm.u16Marker = BB_BITMAP_MARKER;
+        bbbm.width = w;
+        bbbm.height = h;
+        bbbm.size = iOutSize;
+        f = fopen(argv[2], "w+b");
+        if (!f) {
+            printf("Error opening: %s\n", argv[2]);
+        } else {
+            if (bHFile) { // generate HEX file to include in a project
+                StartHexFile(f, iOutSize+sizeof(BB_BITMAP), w, h, argv[2]);
+                AddHexBytes(f, &bbbm, sizeof(BB_BITMAP), 0);
+                AddHexBytes(f, pOut, iOutSize, 1);
+                printf(".H file created successfully!\n");
+            } else { // generate a binary file
+                fwrite(&bbbm, 1, sizeof(BB_BITMAP), f);
+                fwrite(pOut, 1, iOutSize, f);
+                printf("Binary file created successfully!\n");
+            }
+            fflush(f);
+            fclose(f);
+        }
+    } else {
+        printf("Error encoding image: %d\n", rc);
+    }
+    free(png.getBuffer());
+    }
+    return 0;
+}