diff --git a/rawimage.cpp b/rawimage.cpp
index 9462ba0..8dc8c25 100644
--- a/rawimage.cpp
+++ b/rawimage.cpp
@@ -1,12 +1,17 @@
 #include "rawimage.h"
-#include <QDebug>
 #include <cstring>
+#include <lcms2.h>
+#ifndef NO_QT
+#include <QDebug>
 #include <QElapsedTimer>
 #include <QFloat16>
 #include <QColorSpace>
-#include <lcms2.h>
-
 using F16 = qfloat16;
+#else
+#include <algorithm>
+using F16 = uint16_t;
+#endif
+
 
 int THUMB_SIZE = 128;
 int THUMB_SIZE_BORDER = 138;
@@ -78,6 +83,7 @@ RawImage::RawImage(RawImage &&d)
     m_thumbAspect = d.m_thumbAspect;
 }
 
+#ifndef NO_QT
 RawImage::RawImage(const QImage &img)
 {
     qDebug() << img;
@@ -145,6 +151,7 @@ RawImage::RawImage(const QImage &img)
     }
     m_stats.m_stats = false;
 }
+#endif
 
 const RawImage::Stats& RawImage::imageStats() const
 {
@@ -439,7 +446,9 @@ void RawImage::convertToThumbnail()
         loop(out, reinterpret_cast<float*>(m_pixels.get()), 1.0f);
         break;
     default:
+#ifndef NO_QT
         qWarning() << "FLOAT64 should not happend";
+#endif
         return;
     }
 
@@ -922,11 +931,13 @@ bool RawImage::valid() const
     return m_width > 0 && m_height > 0;
 }
 
+#ifndef NO_QT
 void RawImage::setICCProfile(const QByteArray &icc)
 {
     if(icc.size())
         m_iccProfile = std::vector<uint8_t>(icc.begin(), icc.end());
 }
+#endif
 
 void RawImage::setICCProfile(const LibXISF::ByteArray &icc)
 {
@@ -973,12 +984,12 @@ void RawImage::convertTosRGB()
         }
         else
         {
-            qDebug() << "Failed to create color transform";
+            //qDebug() << "Failed to create color transform";
         }
     }
     else
     {
-        qDebug() << "Failed to open icc profile";
+        //qDebug() << "Failed to open icc profile";
     }
 
     cmsCloseProfile(inProfile);
@@ -1022,13 +1033,13 @@ void RawImage::generateLUT()
         }
         else
         {
-            qDebug() << "Failed to create color transform";
+            //qDebug() << "Failed to create color transform";
             m_lut.clear();
         }
     }
     else
     {
-        qDebug() << "Failed to open icc profile";
+        //qDebug() << "Failed to open icc profile";
         m_lut.clear();
     }
 
diff --git a/rawimage.h b/rawimage.h
index 1e41dcc..6677a0d 100644
--- a/rawimage.h
+++ b/rawimage.h
@@ -7,7 +7,9 @@
 #include <stdint.h>
 #include <math.h>
 #include <memory.h>
+#ifndef NO_QT
 #include <QImage>
+#endif
 
 extern int THUMB_SIZE;
 extern int THUMB_SIZE_BORDER;
@@ -83,7 +85,9 @@ public:
     RawImage(uint32_t w, uint32_t h, uint32_t ch, DataType type);
     RawImage(const RawImage &d);
     RawImage(RawImage &&d);
+#ifndef NO_QT
     RawImage(const QImage &img);
+#endif
     const RawImage::Stats& imageStats() const;
     void calcStats();
     uint32_t width() const;
@@ -116,7 +120,9 @@ public:
     static size_t typeSize(DataType type);
     std::vector<RawImage> split() const;
     bool valid() const;
+#ifndef NO_QT
     void setICCProfile(const QByteArray &icc);
+#endif
     void setICCProfile(const LibXISF::ByteArray &icc);
     void convertTosRGB();
     void generateLUT();
diff --git a/thumbnailer/CMakeLists.txt b/thumbnailer/CMakeLists.txt
new file mode 100644
index 0000000..ce3624e
--- /dev/null
+++ b/thumbnailer/CMakeLists.txt
@@ -0,0 +1,26 @@
+option(BUILD_THUMBNAILER "Build generator of thumbnails" OFF)
+
+if(BUILD_THUMBNAILER)
+    if(WIN32)
+        add_library(tenmonthumbnailer SHARED
+            winmain.cpp
+            ../rawimage.cpp
+            ../rawimage_sse.cpp)
+
+        target_compile_definitions(tenmonthumbnailer PRIVATE NO_QT)
+        target_include_directories(tenmonthumbnailer PRIVATE ../libXISF)
+        target_link_libraries(tenmonthumbnailer PRIVATE ${LCMS2_LIB} XISF)
+    else(WIN32)
+        qt_add_executable(tenmonthumbnailer
+            main.cpp
+            ../rawimage.cpp
+            ../rawimage_sse.cpp
+            ../loadimage.cpp
+            ../imageinfodata.cpp)
+
+        target_link_libraries(tenmonthumbnailer PRIVATE Qt6::Core Qt6::Gui ${EXIF_LIB} ${FITS_LIB} ${RAW_LIB} ${WCS_LIB} ${LCMS2_LIB} XISF)
+
+        target_include_directories(tenmonthumbnailer PRIVATE ../libXISF)
+    endif(WIN32)
+endif(BUILD_THUMBNAILER)
+
diff --git a/thumbnailer/main.cpp b/thumbnailer/main.cpp
new file mode 100644
index 0000000..f67f3ec
--- /dev/null
+++ b/thumbnailer/main.cpp
@@ -0,0 +1,48 @@
+#include <QCoreApplication>
+#include <QCommandLineParser>
+#include "../rawimage.h"
+#include "../loadimage.h"
+
+bool OpenGLES = false;
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication a(argc, argv);
+
+    QCommandLineParser parser;
+    parser.addOption({{"s", "size"}, "Size of the thumbnail in pixels (default: 128)", "size", "128"});
+    parser.addPositionalArgument("input", "Input image file");
+    parser.addPositionalArgument("output", "Output image file");
+    parser.addHelpOption();
+
+    parser.process(a);
+
+    QStringList args = parser.positionalArguments();
+
+    if(args.size() < 2)
+        return 1;
+
+    QString input = args[0];
+    QString output = args[1];
+
+    ImageInfoData info;
+    std::shared_ptr<RawImage> rawImage;
+    if(!loadImage(input, info, rawImage))
+        return 1;
+
+    if(!rawImage)
+        return 2;
+
+    rawImage->convertToType(RawImage::UINT8);
+
+    QImage img((const uchar*)rawImage->data(), rawImage->width(), rawImage->height(), QImage::Format_RGBA8888);
+    bool ok = false;
+    int size = parser.value("s").toInt(&ok);
+    if(!ok)size = 128;
+    img = img.scaled(size, size, Qt::KeepAspectRatio);
+    img.save(output, "png");
+
+    //rawImage->convertTosRGB();
+
+    return 0;
+}
diff --git a/thumbnailer/winmain.cpp b/thumbnailer/winmain.cpp
new file mode 100644
index 0000000..9d64f18
--- /dev/null
+++ b/thumbnailer/winmain.cpp
@@ -0,0 +1 @@
+bool OpenGLES = false;