diff --git a/README.md b/README.md
index 8a9654a..74b0701 100644
--- a/README.md
+++ b/README.md
@@ -218,30 +218,35 @@ RGB.
 
 Where possible, plugins support large images. By convention, many of the
 large image plugins are limited to a maximum of 300,000 x 300,000 pixels.
-Anyway, all plugins are also limited by the 
-`QImageIOReader::allocationLimit()`. Below are the maximum sizes for each
-plugin ('n/a' means no limit, i.e. the limit depends on the format encoding).
+Anyway, all plugins are also limited by the
+`QImageIOReader::allocationLimit()`.
 
+> [!note]
+> You can change the maximum limit of 300000 pixels by setting the constant
+> `KIF_LARGE_IMAGE_PIXEL_LIMIT` to the desired value in the cmake file.
+
+Below are the maximum sizes for each plugin ('n/a' means no limit, i.e. the 
+limit depends on the format encoding).
 - ANI: n/a
 - AVIF: 32,768 x 32,768 pixels, in any case no larger than 256 megapixels
 - DDS: n/a
 - EXR: 300,000 x 300,000 pixels
-- EPS: n/a
-- HDR: n/a (large image)
+- EPS: same size as Qt's JPG plugin
+- HDR: 300,000 x 300,000 pixels
 - HEIF: n/a
 - IFF: 65,535 x 65,535 pixels
 - JP2: 300,000 x 300,000 pixels, in any case no larger than 2 gigapixels
 - JXL: 262,144 x 262,144 pixels, in any case no larger than 256 megapixels
-- JXR: n/a, in any case no larger than 4 GB
+- JXR: 300,000 x 300,000 pixels, in any case no larger than 4 GB
 - KRA: same size as Qt's PNG plugin
 - ORA: same size as Qt's PNG plugin
 - PCX: 65,535 x 65,535 pixels
-- PFM: n/a (large image)
+- PFM: 300,000 x 300,000 pixels
 - PIC: 65,535 x 65,535 pixels
 - PSD: 300,000 x 300,000 pixels
 - PXR: 65,535 x 65,535 pixels
 - QOI: 300,000 x 300,000 pixels
-- RAS: n/a (large image)
+- RAS: 300,000 x 300,000 pixels
 - RAW: n/a (depends on the RAW format loaded)
 - RGB: 65,535 x 65,535 pixels
 - SCT: 300,000 x 300,000 pixels
diff --git a/src/imageformats/exr.cpp b/src/imageformats/exr.cpp
index 45a755a..ca0d793 100644
--- a/src/imageformats/exr.cpp
+++ b/src/imageformats/exr.cpp
@@ -7,6 +7,10 @@
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
+#include "exr_p.h"
+#include "scanlineconverter_p.h"
+#include "util_p.h"
+
 /* *** EXR_CONVERT_TO_SRGB ***
  * If defined, the linear data is converted to sRGB on read to accommodate
  * programs that do not support color profiles.
@@ -28,7 +32,7 @@
  * The maximum size in pixel allowed by the plugin.
  */
 #ifndef EXR_MAX_IMAGE_WIDTH
-#define EXR_MAX_IMAGE_WIDTH 300000
+#define EXR_MAX_IMAGE_WIDTH KIF_LARGE_IMAGE_PIXEL_LIMIT
 #endif
 #ifndef EXR_MAX_IMAGE_HEIGHT
 #define EXR_MAX_IMAGE_HEIGHT EXR_MAX_IMAGE_WIDTH
@@ -50,10 +54,6 @@
 #define EXR_LINES_PER_BLOCK 128
 #endif
 
-#include "exr_p.h"
-#include "scanlineconverter_p.h"
-#include "util_p.h"
-
 #include <IexThrowErrnoExc.h>
 #include <ImathBox.h>
 #include <ImfArray.h>
diff --git a/src/imageformats/hdr.cpp b/src/imageformats/hdr.cpp
index bee4fdc..264d1ca 100644
--- a/src/imageformats/hdr.cpp
+++ b/src/imageformats/hdr.cpp
@@ -23,6 +23,16 @@
  */
 //#define HDR_HALF_QUALITY // default commented -> you should define it in your cmake file
 
+/* *** HDR_MAX_IMAGE_WIDTH and HDR_MAX_IMAGE_HEIGHT ***
+ * The maximum size in pixel allowed by the plugin.
+ */
+#ifndef HDR_MAX_IMAGE_WIDTH
+#define HDR_MAX_IMAGE_WIDTH KIF_LARGE_IMAGE_PIXEL_LIMIT
+#endif
+#ifndef HDR_MAX_IMAGE_HEIGHT
+#define HDR_MAX_IMAGE_HEIGHT HDR_MAX_IMAGE_WIDTH
+#endif
+
 typedef unsigned char uchar;
 
 Q_LOGGING_CATEGORY(HDRPLUGIN, "kf.imageformats.plugins.hdr", QtWarningMsg)
@@ -42,7 +52,10 @@ public:
     Header(const Header&) = default;
     Header& operator=(const Header&) = default;
 
-    bool isValid() const { return width() > 0 && height() > 0; }
+    bool isValid() const
+    {
+        return width() > 0 && height() > 0 && width() <= HDR_MAX_IMAGE_WIDTH && height() <= HDR_MAX_IMAGE_HEIGHT;
+    }
     qint32 width() const { return(m_size.width()); }
     qint32 height() const { return(m_size.height()); }
     QString software() const { return(m_software); }
diff --git a/src/imageformats/jp2.cpp b/src/imageformats/jp2.cpp
index 7ea1350..180e0ed 100644
--- a/src/imageformats/jp2.cpp
+++ b/src/imageformats/jp2.cpp
@@ -21,7 +21,7 @@
  * The maximum size in pixel allowed by the plugin.
  */
 #ifndef JP2_MAX_IMAGE_WIDTH
-#define JP2_MAX_IMAGE_WIDTH 300000
+#define JP2_MAX_IMAGE_WIDTH KIF_LARGE_IMAGE_PIXEL_LIMIT
 #endif
 #ifndef JP2_MAX_IMAGE_HEIGHT
 #define JP2_MAX_IMAGE_HEIGHT JP2_MAX_IMAGE_WIDTH
diff --git a/src/imageformats/jxr.cpp b/src/imageformats/jxr.cpp
index 725196e..90f7524 100644
--- a/src/imageformats/jxr.cpp
+++ b/src/imageformats/jxr.cpp
@@ -74,6 +74,16 @@ Q_LOGGING_CATEGORY(LOG_JXRPLUGIN, "kf.imageformats.plugins.jxr", QtWarningMsg)
 
 // #define JXR_ENABLE_ADVANCED_METADATA
 
+/* *** JXR_MAX_IMAGE_WIDTH and JXR_MAX_IMAGE_HEIGHT ***
+ * The maximum size in pixel allowed by the plugin.
+ */
+#ifndef JXR_MAX_IMAGE_WIDTH
+#define JXR_MAX_IMAGE_WIDTH KIF_LARGE_IMAGE_PIXEL_LIMIT
+#endif
+#ifndef JXR_MAX_IMAGE_HEIGHT
+#define JXR_MAX_IMAGE_HEIGHT JXR_MAX_IMAGE_WIDTH
+#endif
+
 #ifndef JXR_MAX_METADATA_SIZE
 /*!
  * XMP and EXIF maximum size.
@@ -386,6 +396,11 @@ public:
         if (pDecoder) {
             qint32 w, h;
             pDecoder->GetSize(pDecoder, &w, &h);
+            if (w > JXR_MAX_IMAGE_WIDTH || h > JXR_MAX_IMAGE_HEIGHT || w < 1 || h < 1) {
+                qCCritical(LOG_JXRPLUGIN) << "JXRHandlerPrivate::imageSize() Maximum image size is limited to" << JXR_MAX_IMAGE_WIDTH << "x"
+                                          << JXR_MAX_IMAGE_HEIGHT << "pixels";
+                return {};
+            }
             return QSize(w, h);
         }
         return {};
@@ -1053,6 +1068,10 @@ bool JXRHandler::write(const QImage &image)
         qCWarning(LOG_JXRPLUGIN) << "JXRHandler::write() image too large: the image cannot exceed 4GB.";
         return false;
     }
+    if (image.width() > JXR_MAX_IMAGE_WIDTH || image.height() > JXR_MAX_IMAGE_HEIGHT) {
+        qCCritical(LOG_JXRPLUGIN) << "JXRHandler::write() Maximum image size is limited to" << JXR_MAX_IMAGE_WIDTH << "x" << JXR_MAX_IMAGE_HEIGHT << "pixels";
+        return {};
+    }
 
     if (!d->initForWriting()) {
         return false;
diff --git a/src/imageformats/pfm.cpp b/src/imageformats/pfm.cpp
index e431b2c..68ace1e 100644
--- a/src/imageformats/pfm.cpp
+++ b/src/imageformats/pfm.cpp
@@ -22,6 +22,16 @@
 Q_DECLARE_LOGGING_CATEGORY(LOG_PFMPLUGIN)
 Q_LOGGING_CATEGORY(LOG_PFMPLUGIN, "kf.imageformats.plugins.pfm", QtWarningMsg)
 
+/* *** PFM_MAX_IMAGE_WIDTH and PFM_MAX_IMAGE_HEIGHT ***
+ * The maximum size in pixel allowed by the plugin.
+ */
+#ifndef PFM_MAX_IMAGE_WIDTH
+#define PFM_MAX_IMAGE_WIDTH KIF_LARGE_IMAGE_PIXEL_LIMIT
+#endif
+#ifndef PFM_MAX_IMAGE_HEIGHT
+#define PFM_MAX_IMAGE_HEIGHT PFM_MAX_IMAGE_WIDTH
+#endif
+
 class PFMHeader
 {
 private:
@@ -80,7 +90,7 @@ public:
 
     bool isValid() const
     {
-        return (m_width > 0 && m_height > 0);
+        return (m_width > 0 && m_height > 0 && m_width <= PFM_MAX_IMAGE_WIDTH && m_height <= PFM_MAX_IMAGE_HEIGHT);
     }
 
     bool isBlackAndWhite() const
diff --git a/src/imageformats/psd.cpp b/src/imageformats/psd.cpp
index 8960bbb..444b9d8 100644
--- a/src/imageformats/psd.cpp
+++ b/src/imageformats/psd.cpp
@@ -72,6 +72,16 @@ typedef quint8 uchar;
  */
 // #define PSD_FORCE_RGBA
 
+/* *** PSD_MAX_IMAGE_WIDTH and PSD_MAX_IMAGE_HEIGHT ***
+ * The maximum size in pixel allowed by the plugin.
+ */
+#ifndef PSD_MAX_IMAGE_WIDTH
+#define PSD_MAX_IMAGE_WIDTH KIF_LARGE_IMAGE_PIXEL_LIMIT
+#endif
+#ifndef PSD_MAX_IMAGE_HEIGHT
+#define PSD_MAX_IMAGE_HEIGHT PSD_MAX_IMAGE_WIDTH
+#endif
+
 namespace // Private.
 {
 
@@ -678,7 +688,7 @@ static bool IsValid(const PSDHeader &header)
         qDebug() << "PSD header: invalid number of channels" << header.channel_count;
         return false;
     }
-    if (header.width > 300000 || header.height > 300000) {
+    if (header.width > std::min(300000, PSD_MAX_IMAGE_WIDTH) || header.height > std::min(300000, PSD_MAX_IMAGE_HEIGHT)) {
         qDebug() << "PSD header: invalid image size" << header.width << "x" << header.height;
         return false;
     }
diff --git a/src/imageformats/qoi.cpp b/src/imageformats/qoi.cpp
index 09fe138..89b8970 100644
--- a/src/imageformats/qoi.cpp
+++ b/src/imageformats/qoi.cpp
@@ -15,6 +15,16 @@
 #include <QIODevice>
 #include <QImage>
 
+/* *** QOI_MAX_IMAGE_WIDTH and QOI_MAX_IMAGE_HEIGHT ***
+ * The maximum size in pixel allowed by the plugin.
+ */
+#ifndef QOI_MAX_IMAGE_WIDTH
+#define QOI_MAX_IMAGE_WIDTH KIF_LARGE_IMAGE_PIXEL_LIMIT
+#endif
+#ifndef QOI_MAX_IMAGE_HEIGHT
+#define QOI_MAX_IMAGE_HEIGHT QOI_MAX_IMAGE_WIDTH
+#endif
+
 namespace // Private
 {
 
@@ -92,7 +102,7 @@ static bool IsSupported(const QoiHeader &head)
         return false;
     }
     // Set a reasonable upper limit
-    if (head.Width > 300000 || head.Height > 300000) {
+    if (head.Width > QOI_MAX_IMAGE_WIDTH || head.Height > QOI_MAX_IMAGE_HEIGHT) {
         return false;
     }
     return true;
diff --git a/src/imageformats/ras.cpp b/src/imageformats/ras.cpp
index 33acf4a..ea2afea 100644
--- a/src/imageformats/ras.cpp
+++ b/src/imageformats/ras.cpp
@@ -15,6 +15,16 @@
 #include <QDebug>
 #include <QImage>
 
+/* *** RAS_MAX_IMAGE_WIDTH and RAS_MAX_IMAGE_HEIGHT ***
+ * The maximum size in pixel allowed by the plugin.
+ */
+#ifndef RAS_MAX_IMAGE_WIDTH
+#define RAS_MAX_IMAGE_WIDTH KIF_LARGE_IMAGE_PIXEL_LIMIT
+#endif
+#ifndef RAS_MAX_IMAGE_HEIGHT
+#define RAS_MAX_IMAGE_HEIGHT RAS_MAX_IMAGE_WIDTH
+#endif
+
 namespace // Private.
 {
 // format info from http://www.fileformat.info/format/sunraster/egff.htm
@@ -84,9 +94,10 @@ static bool IsSupported(const RasHeader &head)
     if (head.Depth != 1 && head.Depth != 8 && head.Depth != 24 && head.Depth != 32) {
         return false;
     }
-    if (head.Width == 0 || head.Height == 0) {
+    if (head.Width == 0 || head.Height == 0 || head.Width > RAS_MAX_IMAGE_WIDTH || head.Height > RAS_MAX_IMAGE_HEIGHT) {
         return false;
     }
+
     // the Type field adds support for RLE(BGR), RGB and other encodings
     // we support Type 1: Normal(BGR), Type 2: RLE(BGR) and Type 3: Normal(RGB) ONLY!
     // TODO: add support for Type 4,5: TIFF/IFF
@@ -388,7 +399,7 @@ bool RASHandler::read(QImage *outImage)
     s >> ras;
 
     if (ras.ColorMapLength > kMaxQVectorSize) {
-        qWarning() << "LoadRAS() unsupported image color map length in file header" << ras.ColorMapLength;
+        qWarning() << "read() unsupported image color map length in file header" << ras.ColorMapLength;
         return false;
     }
 
diff --git a/src/imageformats/sct.cpp b/src/imageformats/sct.cpp
index 8f70be5..7da6357 100644
--- a/src/imageformats/sct.cpp
+++ b/src/imageformats/sct.cpp
@@ -19,6 +19,16 @@
 
 Q_LOGGING_CATEGORY(LOG_SCTPLUGIN, "kf.imageformats.plugins.scitex", QtWarningMsg)
 
+/* *** SCT_MAX_IMAGE_WIDTH and SCT_MAX_IMAGE_HEIGHT ***
+ * The maximum size in pixel allowed by the plugin.
+ */
+#ifndef SCT_MAX_IMAGE_WIDTH
+#define SCT_MAX_IMAGE_WIDTH KIF_LARGE_IMAGE_PIXEL_LIMIT
+#endif
+#ifndef SCT_MAX_IMAGE_HEIGHT
+#define SCT_MAX_IMAGE_HEIGHT SCT_MAX_IMAGE_WIDTH
+#endif
+
 #define CTRLBLOCK_SIZE 256
 #define PRMSBLOCK_SIZE_CT 256
 
@@ -139,7 +149,7 @@ public:
             return false;
         }
         // Set a reasonable upper limit
-        if (width() > 300000 || height() > 300000) {
+        if (width() > SCT_MAX_IMAGE_WIDTH || height() > SCT_MAX_IMAGE_HEIGHT) {
             return false;
         }
         return m_cb.fileType() == QStringLiteral(FILETYPE_CT) && format() != QImage::Format_Invalid;
diff --git a/src/imageformats/util_p.h b/src/imageformats/util_p.h
index 2129364..1fbc775 100644
--- a/src/imageformats/util_p.h
+++ b/src/imageformats/util_p.h
@@ -13,6 +13,11 @@
 #include <QImage>
 #include <QImageIOHandler>
 
+// Default maximum width and height for the large image plugins.
+#ifndef KIF_LARGE_IMAGE_PIXEL_LIMIT
+#define KIF_LARGE_IMAGE_PIXEL_LIMIT 300000
+#endif
+
 // Image metadata keys to use in plugins (so they are consistent)
 #define META_KEY_ALTITUDE "Altitude"
 #define META_KEY_AUTHOR "Author"
diff --git a/src/imageformats/xcf.cpp b/src/imageformats/xcf.cpp
index 26d74a7..bfc9b76 100644
--- a/src/imageformats/xcf.cpp
+++ b/src/imageformats/xcf.cpp
@@ -26,12 +26,16 @@
 #define USE_FLOAT_IMAGES // default uncommented
 
 // Let's set a "reasonable" maximum size
-#define MAX_IMAGE_WIDTH 300000
-#define MAX_IMAGE_HEIGHT 300000
+#ifndef XCF_MAX_IMAGE_WIDTH
+#define XCF_MAX_IMAGE_WIDTH KIF_LARGE_IMAGE_PIXEL_LIMIT
+#endif
+#ifndef XCF_MAX_IMAGE_HEIGHT
+#define XCF_MAX_IMAGE_HEIGHT XCF_MAX_IMAGE_WIDTH
+#endif
 #else
 // While it is possible to have images larger than 32767 pixels, QPainter seems unable to go beyond this threshold using Qt 5.
-#define MAX_IMAGE_WIDTH 32767
-#define MAX_IMAGE_HEIGHT 32767
+#define XCF_MAX_IMAGE_WIDTH 32767
+#define XCF_MAX_IMAGE_HEIGHT 32767
 #endif
 
 #ifdef USE_FLOAT_IMAGES
@@ -844,8 +848,8 @@ bool XCFImageFormat::readXCFHeader(QDataStream &xcf_io, XCFImage::Header *header
         return false;
     }
 
-    if (header->width > MAX_IMAGE_WIDTH || header->height > MAX_IMAGE_HEIGHT) {
-        qCWarning(XCFPLUGIN) << "The maximum image size is limited to" << MAX_IMAGE_WIDTH << "x" << MAX_IMAGE_HEIGHT << "px";
+    if (header->width > XCF_MAX_IMAGE_WIDTH || header->height > XCF_MAX_IMAGE_HEIGHT) {
+        qCWarning(XCFPLUGIN) << "The maximum image size is limited to" << XCF_MAX_IMAGE_WIDTH << "x" << XCF_MAX_IMAGE_HEIGHT << "px";
         return false;
     }
 
@@ -1364,8 +1368,8 @@ bool XCFImageFormat::composeTiles(XCFImage &xcf_image)
         qCWarning(XCFPLUGIN) << "On 32-bits programs the maximum layer size is limited to" << 16384 << "x" << 16384 << "px";
         return false;
     }
-    if (layer.width > MAX_IMAGE_WIDTH || layer.height > MAX_IMAGE_HEIGHT) {
-        qCWarning(XCFPLUGIN) << "The maximum layer size is limited to" << MAX_IMAGE_WIDTH << "x" << MAX_IMAGE_HEIGHT << "px";
+    if (layer.width > XCF_MAX_IMAGE_WIDTH || layer.height > XCF_MAX_IMAGE_HEIGHT) {
+        qCWarning(XCFPLUGIN) << "The maximum layer size is limited to" << XCF_MAX_IMAGE_WIDTH << "x" << XCF_MAX_IMAGE_HEIGHT << "px";
         return false;
     }
 
@@ -2793,8 +2797,7 @@ void XCFImageFormat::copyLayerToImage(XCFImage &xcf_image)
                 QPainter painter(&image);
                 painter.setOpacity(layer.opacity / 255.0);
                 painter.setCompositionMode(QPainter::CompositionMode_Source);
-                if (x + layer.x_offset < MAX_IMAGE_WIDTH &&
-                    y + layer.y_offset < MAX_IMAGE_HEIGHT) {
+                if (x + layer.x_offset < XCF_MAX_IMAGE_WIDTH && y + layer.y_offset < XCF_MAX_IMAGE_HEIGHT) {
                     painter.drawImage(x + layer.x_offset, y + layer.y_offset, layer.image_tiles[j][i]);
                 }
                 continue;
@@ -3196,8 +3199,7 @@ void XCFImageFormat::mergeLayerIntoImage(XCFImage &xcf_image)
                     qint32 x = qint32(i * TILE_WIDTH);
 
                     QImage &tile = layer.image_tiles[j][i];
-                    if (x + layer.x_offset < MAX_IMAGE_WIDTH &&
-                        y + layer.y_offset < MAX_IMAGE_HEIGHT) {
+                    if (x + layer.x_offset < XCF_MAX_IMAGE_WIDTH && y + layer.y_offset < XCF_MAX_IMAGE_HEIGHT) {
                         painter.drawImage(x + layer.x_offset, y + layer.y_offset, tile);
                     }
                 }
@@ -3248,8 +3250,7 @@ void XCFImageFormat::mergeLayerIntoImage(XCFImage &xcf_image)
                 QPainter painter(&image);
                 painter.setOpacity(layer.opacity / 255.0);
                 painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
-                if (x + layer.x_offset < MAX_IMAGE_WIDTH &&
-                    y + layer.y_offset < MAX_IMAGE_HEIGHT) {
+                if (x + layer.x_offset < XCF_MAX_IMAGE_WIDTH && y + layer.y_offset < XCF_MAX_IMAGE_HEIGHT) {
                     painter.drawImage(x + layer.x_offset, y + layer.y_offset, layer.image_tiles[j][i]);
                 }
                 continue;