diff --git a/Ink Canvas/Controls/PdfEmbeddedView.cs b/Ink Canvas/Controls/PdfEmbeddedView.cs
index 6c4d21f7..5885a37a 100644
--- a/Ink Canvas/Controls/PdfEmbeddedView.cs	
+++ b/Ink Canvas/Controls/PdfEmbeddedView.cs	
@@ -102,7 +102,7 @@ namespace Ink_Canvas.Controls
             NotifyPageNavigationStateChanged();
             try
             {
-                BitmapSource raw = await PdfWinRtHelper.RenderPageToBitmapSourceAsync(_pdfPath, pageIndex);
+                BitmapSource raw = await PdfDocumentRenderHelper.RenderPageToBitmapSourceAsync(_pdfPath, pageIndex);
                 if (raw == null)
                     return;
 
diff --git a/Ink Canvas/Helpers/PdfDocumentRenderHelper.cs b/Ink Canvas/Helpers/PdfDocumentRenderHelper.cs
new file mode 100644
index 00000000..2a42383a
--- /dev/null
+++ b/Ink Canvas/Helpers/PdfDocumentRenderHelper.cs	
@@ -0,0 +1,62 @@
+using System;
+using System.Threading.Tasks;
+using System.Windows.Media.Imaging;
+
+namespace Ink_Canvas.Helpers
+{
+    /// <summary>
+    /// PDF 页数与位图渲染：优先 <see cref="PdfWinRtHelper"/>（Windows.Data.Pdf），失败或无效结果时使用 PDFtoImage(MIT) 备用。
+    /// </summary>
+    internal static class PdfDocumentRenderHelper
+    {
+        public static async Task<uint> GetPageCountAsync(string pdfPath)
+        {
+            uint winRt = 0;
+            try
+            {
+                winRt = await PdfWinRtHelper.GetPageCountAsync(pdfPath).ConfigureAwait(false);
+            }
+            catch (Exception ex)
+            {
+                LogHelper.WriteLogToFile($"PDF WinRT 获取页数失败，将尝试 PDFtoImage(MIT): {ex.Message}", LogHelper.LogType.Warning);
+            }
+
+            if (winRt > 0)
+                return winRt;
+
+            try
+            {
+                return await Task.Run(() => PdfToImageMitHelper.GetPageCount(pdfPath)).ConfigureAwait(false);
+            }
+            catch (Exception ex)
+            {
+                LogHelper.WriteLogToFile($"PDFtoImage(MIT) 获取页数失败: {ex.Message}", LogHelper.LogType.Warning);
+                return 0;
+            }
+        }
+
+        public static async Task<BitmapSource> RenderPageToBitmapSourceAsync(string pdfPath, uint pageIndex)
+        {
+            try
+            {
+                BitmapSource win = await PdfWinRtHelper.RenderPageToBitmapSourceAsync(pdfPath, pageIndex).ConfigureAwait(false);
+                if (win != null)
+                    return win;
+            }
+            catch (Exception ex)
+            {
+                LogHelper.WriteLogToFile($"PDF WinRT 渲染失败，将尝试 PDFtoImage(MIT): {ex.Message}", LogHelper.LogType.Warning);
+            }
+
+            try
+            {
+                return await PdfToImageMitHelper.RenderPageToBitmapSourceAsync(pdfPath, pageIndex).ConfigureAwait(false);
+            }
+            catch (Exception ex)
+            {
+                LogHelper.WriteLogToFile($"PDFtoImage(MIT) 渲染失败: {ex.Message}", LogHelper.LogType.Warning);
+                return null;
+            }
+        }
+    }
+}
diff --git a/Ink Canvas/Helpers/PdfToImageMitHelper.cs b/Ink Canvas/Helpers/PdfToImageMitHelper.cs
new file mode 100644
index 00000000..970e103a
--- /dev/null
+++ b/Ink Canvas/Helpers/PdfToImageMitHelper.cs	
@@ -0,0 +1,96 @@
+using PDFtoImage;
+using SkiaSharp;
+using System;
+using System.IO;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Media.Imaging;
+
+namespace Ink_Canvas.Helpers
+{
+    /// <summary>
+    /// 使用 NuGet「PDFtoImage」(MIT，基于 PDFium/SkiaSharp) 解析/渲染 PDF，作为 WinRT 不可用时的备用实现。
+    /// </summary>
+    internal static class PdfToImageMitHelper
+    {
+        public static uint GetPageCount(string pdfPath)
+        {
+            if (string.IsNullOrWhiteSpace(pdfPath) || !File.Exists(pdfPath))
+                return 0;
+
+            try
+            {
+                using (var fs = new FileStream(pdfPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
+                {
+                    int n = Conversion.GetPageCount(fs, leaveOpen: true, password: null);
+                    return n < 0 ? 0u : (uint)n;
+                }
+            }
+            catch
+            {
+                return 0;
+            }
+        }
+
+        /// <summary>
+        /// 在工作线程加载 PDF 页为 <see cref="SKBitmap"/>，在 UI 线程编码为 WPF <see cref="BitmapSource"/>。
+        /// </summary>
+        public static async Task<BitmapSource> RenderPageToBitmapSourceAsync(string pdfPath, uint pageIndex)
+        {
+            if (string.IsNullOrWhiteSpace(pdfPath) || !File.Exists(pdfPath))
+                return null;
+
+            int page = checked((int)pageIndex);
+
+            SKBitmap skBitmap = await Task.Run(() =>
+            {
+                try
+                {
+                    using (var fs = new FileStream(pdfPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
+                    {
+                        return Conversion.ToImage(fs, System.Index.FromStart(page), leaveOpen: true, password: null, options: default);
+                    }
+                }
+                catch
+                {
+                    return null;
+                }
+            }).ConfigureAwait(false);
+
+            if (skBitmap == null)
+                return null;
+
+            try
+            {
+                if (Application.Current?.Dispatcher == null)
+                    return null;
+
+                return await Application.Current.Dispatcher.InvokeAsync(() => EncodeSkBitmapToBitmapSource(skBitmap));
+            }
+            finally
+            {
+                skBitmap.Dispose();
+            }
+        }
+
+        private static BitmapSource EncodeSkBitmapToBitmapSource(SKBitmap bitmap)
+        {
+            using (var image = SKImage.FromBitmap(bitmap))
+            using (var data = image.Encode(SKEncodedImageFormat.Png, 100))
+            {
+                var ms = new MemoryStream();
+                data.SaveTo(ms);
+                ms.Position = 0;
+
+                var bi = new BitmapImage();
+                bi.BeginInit();
+                bi.StreamSource = ms;
+                bi.CacheOption = BitmapCacheOption.OnLoad;
+                bi.EndInit();
+                bi.Freeze();
+                ms.Dispose();
+                return bi;
+            }
+        }
+    }
+}
diff --git a/Ink Canvas/InkCanvasForClass.csproj b/Ink Canvas/InkCanvasForClass.csproj
index 44764346..2607a500 100644
--- a/Ink Canvas/InkCanvasForClass.csproj	
+++ b/Ink Canvas/InkCanvasForClass.csproj	
@@ -141,6 +141,7 @@
     <PackageReference Include="MdXaml" Version="1.27.0" />
     <PackageReference Include="Microsoft.Office.Interop.PowerPoint" Version="15.0.4420.1018" />
     <PackageReference Include="Microsoft.Windows.SDK.Contracts" Version="10.0.19041.2" />
+    <PackageReference Include="PDFtoImage" Version="5.1.0" />
     <PackageReference Include="System.Runtime.WindowsRuntime" Version="4.7.0" />
     <PackageReference Include="MicrosoftOfficeCore" Version="15.0.0" />
     <PackageReference Include="Microsoft.Toolkit.Uwp.Notifications" Version="7.1.3" />
diff --git a/Ink Canvas/MainWindow_cs/MW_ElementsControls.cs b/Ink Canvas/MainWindow_cs/MW_ElementsControls.cs
index e91bcb73..d8856924 100644
--- a/Ink Canvas/MainWindow_cs/MW_ElementsControls.cs	
+++ b/Ink Canvas/MainWindow_cs/MW_ElementsControls.cs	
@@ -1007,7 +1007,7 @@ namespace Ink_Canvas
                 string newFilePath = Path.Combine(savePath, timestamp + ".pdf");
                 await Task.Run(() => File.Copy(filePath, newFilePath, true));
 
-                uint pageCount = await PdfWinRtHelper.GetPageCountAsync(newFilePath);
+                uint pageCount = await PdfDocumentRenderHelper.GetPageCountAsync(newFilePath);
                 if (pageCount == 0)
                 {
                     ShowNotification("无法打开 PDF（可能已加密、损坏或不支持）。");
@@ -1037,7 +1037,7 @@ namespace Ink_Canvas
 
             try
             {
-                uint pageCount = await PdfWinRtHelper.GetPageCountAsync(info.SourcePath);
+                uint pageCount = await PdfDocumentRenderHelper.GetPageCountAsync(info.SourcePath);
                 if (pageCount == 0) return;
 
                 bool compress = isLoaded && Settings.Canvas.IsCompressPicturesUploaded;
diff --git a/Ink Canvas/packages.lock.json b/Ink Canvas/packages.lock.json
index d96e90d0..ed98aa02 100644
--- a/Ink Canvas/packages.lock.json	
+++ b/Ink Canvas/packages.lock.json	
@@ -157,6 +157,21 @@
           "Microsoft.Win32.Registry": "5.0.0"
         }
       },
+      "PDFtoImage": {
+        "type": "Direct",
+        "requested": "[5.1.0, )",
+        "resolved": "5.1.0",
+        "contentHash": "QbGA2pdMCdQFI0MpXXDD7teGJsOR3ic9T8iGv3hXTtyMSjJkVgFDKRxRU9Ri31DbkkpvY7azzNeUTWdf5AqPZg==",
+        "dependencies": {
+          "SkiaSharp": "3.119.0",
+          "SkiaSharp.NativeAssets.Linux.NoDependencies": "3.119.0",
+          "SkiaSharp.NativeAssets.Win32": "3.119.0",
+          "SkiaSharp.NativeAssets.macOS": "3.119.0",
+          "bblanchon.PDFium.Linux": "137.0.7149",
+          "bblanchon.PDFium.Win32": "137.0.7149",
+          "bblanchon.PDFium.macOS": "137.0.7149"
+        }
+      },
       "Sentry": {
         "type": "Direct",
         "requested": "[6.2.0, )",
@@ -190,6 +205,21 @@
         "resolved": "6.3.0.90",
         "contentHash": "WVTb5MxwGqKdeasd3nG5udlV4t6OpvkFanziwI133K0/QJ5FvZmfzRQgpAjGTJhQfIA8GP7AzKQ3sTY9JOFk8Q=="
       },
+      "bblanchon.PDFium.Linux": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "tT2GeyKE39ci3THZ/ddzhvZ3efgfCdEsZtDfEH+kDV1dfl2hxFeZesdTcRnxj3hp/ScnxTNJNa0RZtwOwc0I3g=="
+      },
+      "bblanchon.PDFium.macOS": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "OXZJhlJ/jynL5dz9/OJ65UFCIqZBepdyd84xE11AAWgG6UPERi2p4tEmmIAbloZ+aRBtaCRWNk5pgyF2WDe7vQ=="
+      },
+      "bblanchon.PDFium.Win32": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "M3C2UCvKD1X6hJ/VB6arBMhI91OYHzybWMAOVFUKuEpfTR1nKfbYa/1dNVHKPmc8ST0SAYeVOlkv+XlJrsXy/Q=="
+      },
       "Fody": {
         "type": "Transitive",
         "resolved": "6.8.2",
@@ -240,6 +270,31 @@
         "resolved": "4.0.0",
         "contentHash": "5HKzttVKWeKoDQKJd3+J7Dy1MW6gbNNYfftkVufe2ddFQD0kXjnT1IN3ZJBfF6QVEQmHpQSp+/PT7Jo2YyHFcw=="
       },
+      "SkiaSharp": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "gR9yVoOta2Mc1Rxt15LD65AckfHMfwjIs/3kkD59C9bT2nYYISsE6uz3t4aMPNHA6CgsIL0Ssn+jE5OVilZ1yw==",
+        "dependencies": {
+          "SkiaSharp.NativeAssets.Win32": "3.119.0",
+          "SkiaSharp.NativeAssets.macOS": "3.119.0",
+          "System.Memory": "4.5.5"
+        }
+      },
+      "SkiaSharp.NativeAssets.Linux.NoDependencies": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "e92vdqf1VOETPjy1T67Fs1zPxfGMM1nbrpt69GM5foXSI/iIbq6L9avPz/bl/DbWtb81D0yF/NKjRmXuOZoLcg=="
+      },
+      "SkiaSharp.NativeAssets.macOS": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "YE1vNn0Nyw2PWtv7hw1PYkKJO0itFiQp9vSqGppZUKzQJqwp28a2jgdCMPfYtOiR8KCnDgZqQoynqJRRaE2ZVg=="
+      },
+      "SkiaSharp.NativeAssets.Win32": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "IwC9yx36lOdXVT2DjgmWHl1qkVspfj8ctd4+li8CNnvqdfaTolXCOh6TLznURcPAvzatx9K/tLOB7zT6T8EA9w=="
+      },
       "System.Buffers": {
         "type": "Transitive",
         "resolved": "4.5.1",
@@ -351,6 +406,21 @@
       }
     },
     ".NETFramework,Version=v4.7.2/win": {
+      "bblanchon.PDFium.Linux": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "tT2GeyKE39ci3THZ/ddzhvZ3efgfCdEsZtDfEH+kDV1dfl2hxFeZesdTcRnxj3hp/ScnxTNJNa0RZtwOwc0I3g=="
+      },
+      "bblanchon.PDFium.macOS": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "OXZJhlJ/jynL5dz9/OJ65UFCIqZBepdyd84xE11AAWgG6UPERi2p4tEmmIAbloZ+aRBtaCRWNk5pgyF2WDe7vQ=="
+      },
+      "bblanchon.PDFium.Win32": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "M3C2UCvKD1X6hJ/VB6arBMhI91OYHzybWMAOVFUKuEpfTR1nKfbYa/1dNVHKPmc8ST0SAYeVOlkv+XlJrsXy/Q=="
+      },
       "Microsoft.Win32.Registry": {
         "type": "Transitive",
         "resolved": "5.0.0",
@@ -360,6 +430,21 @@
           "System.Security.Principal.Windows": "5.0.0"
         }
       },
+      "SkiaSharp.NativeAssets.Linux.NoDependencies": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "e92vdqf1VOETPjy1T67Fs1zPxfGMM1nbrpt69GM5foXSI/iIbq6L9avPz/bl/DbWtb81D0yF/NKjRmXuOZoLcg=="
+      },
+      "SkiaSharp.NativeAssets.macOS": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "YE1vNn0Nyw2PWtv7hw1PYkKJO0itFiQp9vSqGppZUKzQJqwp28a2jgdCMPfYtOiR8KCnDgZqQoynqJRRaE2ZVg=="
+      },
+      "SkiaSharp.NativeAssets.Win32": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "IwC9yx36lOdXVT2DjgmWHl1qkVspfj8ctd4+li8CNnvqdfaTolXCOh6TLznURcPAvzatx9K/tLOB7zT6T8EA9w=="
+      },
       "System.Runtime.InteropServices.RuntimeInformation": {
         "type": "Transitive",
         "resolved": "4.3.0",
@@ -380,6 +465,21 @@
       }
     },
     ".NETFramework,Version=v4.7.2/win-arm64": {
+      "bblanchon.PDFium.Linux": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "tT2GeyKE39ci3THZ/ddzhvZ3efgfCdEsZtDfEH+kDV1dfl2hxFeZesdTcRnxj3hp/ScnxTNJNa0RZtwOwc0I3g=="
+      },
+      "bblanchon.PDFium.macOS": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "OXZJhlJ/jynL5dz9/OJ65UFCIqZBepdyd84xE11AAWgG6UPERi2p4tEmmIAbloZ+aRBtaCRWNk5pgyF2WDe7vQ=="
+      },
+      "bblanchon.PDFium.Win32": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "M3C2UCvKD1X6hJ/VB6arBMhI91OYHzybWMAOVFUKuEpfTR1nKfbYa/1dNVHKPmc8ST0SAYeVOlkv+XlJrsXy/Q=="
+      },
       "Microsoft.Win32.Registry": {
         "type": "Transitive",
         "resolved": "5.0.0",
@@ -389,6 +489,21 @@
           "System.Security.Principal.Windows": "5.0.0"
         }
       },
+      "SkiaSharp.NativeAssets.Linux.NoDependencies": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "e92vdqf1VOETPjy1T67Fs1zPxfGMM1nbrpt69GM5foXSI/iIbq6L9avPz/bl/DbWtb81D0yF/NKjRmXuOZoLcg=="
+      },
+      "SkiaSharp.NativeAssets.macOS": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "YE1vNn0Nyw2PWtv7hw1PYkKJO0itFiQp9vSqGppZUKzQJqwp28a2jgdCMPfYtOiR8KCnDgZqQoynqJRRaE2ZVg=="
+      },
+      "SkiaSharp.NativeAssets.Win32": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "IwC9yx36lOdXVT2DjgmWHl1qkVspfj8ctd4+li8CNnvqdfaTolXCOh6TLznURcPAvzatx9K/tLOB7zT6T8EA9w=="
+      },
       "System.Runtime.InteropServices.RuntimeInformation": {
         "type": "Transitive",
         "resolved": "4.3.0",
@@ -409,6 +524,21 @@
       }
     },
     ".NETFramework,Version=v4.7.2/win-x64": {
+      "bblanchon.PDFium.Linux": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "tT2GeyKE39ci3THZ/ddzhvZ3efgfCdEsZtDfEH+kDV1dfl2hxFeZesdTcRnxj3hp/ScnxTNJNa0RZtwOwc0I3g=="
+      },
+      "bblanchon.PDFium.macOS": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "OXZJhlJ/jynL5dz9/OJ65UFCIqZBepdyd84xE11AAWgG6UPERi2p4tEmmIAbloZ+aRBtaCRWNk5pgyF2WDe7vQ=="
+      },
+      "bblanchon.PDFium.Win32": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "M3C2UCvKD1X6hJ/VB6arBMhI91OYHzybWMAOVFUKuEpfTR1nKfbYa/1dNVHKPmc8ST0SAYeVOlkv+XlJrsXy/Q=="
+      },
       "Microsoft.Win32.Registry": {
         "type": "Transitive",
         "resolved": "5.0.0",
@@ -418,6 +548,21 @@
           "System.Security.Principal.Windows": "5.0.0"
         }
       },
+      "SkiaSharp.NativeAssets.Linux.NoDependencies": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "e92vdqf1VOETPjy1T67Fs1zPxfGMM1nbrpt69GM5foXSI/iIbq6L9avPz/bl/DbWtb81D0yF/NKjRmXuOZoLcg=="
+      },
+      "SkiaSharp.NativeAssets.macOS": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "YE1vNn0Nyw2PWtv7hw1PYkKJO0itFiQp9vSqGppZUKzQJqwp28a2jgdCMPfYtOiR8KCnDgZqQoynqJRRaE2ZVg=="
+      },
+      "SkiaSharp.NativeAssets.Win32": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "IwC9yx36lOdXVT2DjgmWHl1qkVspfj8ctd4+li8CNnvqdfaTolXCOh6TLznURcPAvzatx9K/tLOB7zT6T8EA9w=="
+      },
       "System.Runtime.InteropServices.RuntimeInformation": {
         "type": "Transitive",
         "resolved": "4.3.0",
@@ -438,6 +583,21 @@
       }
     },
     ".NETFramework,Version=v4.7.2/win-x86": {
+      "bblanchon.PDFium.Linux": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "tT2GeyKE39ci3THZ/ddzhvZ3efgfCdEsZtDfEH+kDV1dfl2hxFeZesdTcRnxj3hp/ScnxTNJNa0RZtwOwc0I3g=="
+      },
+      "bblanchon.PDFium.macOS": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "OXZJhlJ/jynL5dz9/OJ65UFCIqZBepdyd84xE11AAWgG6UPERi2p4tEmmIAbloZ+aRBtaCRWNk5pgyF2WDe7vQ=="
+      },
+      "bblanchon.PDFium.Win32": {
+        "type": "Transitive",
+        "resolved": "137.0.7149",
+        "contentHash": "M3C2UCvKD1X6hJ/VB6arBMhI91OYHzybWMAOVFUKuEpfTR1nKfbYa/1dNVHKPmc8ST0SAYeVOlkv+XlJrsXy/Q=="
+      },
       "Microsoft.Win32.Registry": {
         "type": "Transitive",
         "resolved": "5.0.0",
@@ -447,6 +607,21 @@
           "System.Security.Principal.Windows": "5.0.0"
         }
       },
+      "SkiaSharp.NativeAssets.Linux.NoDependencies": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "e92vdqf1VOETPjy1T67Fs1zPxfGMM1nbrpt69GM5foXSI/iIbq6L9avPz/bl/DbWtb81D0yF/NKjRmXuOZoLcg=="
+      },
+      "SkiaSharp.NativeAssets.macOS": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "YE1vNn0Nyw2PWtv7hw1PYkKJO0itFiQp9vSqGppZUKzQJqwp28a2jgdCMPfYtOiR8KCnDgZqQoynqJRRaE2ZVg=="
+      },
+      "SkiaSharp.NativeAssets.Win32": {
+        "type": "Transitive",
+        "resolved": "3.119.0",
+        "contentHash": "IwC9yx36lOdXVT2DjgmWHl1qkVspfj8ctd4+li8CNnvqdfaTolXCOh6TLznURcPAvzatx9K/tLOB7zT6T8EA9w=="
+      },
       "System.Runtime.InteropServices.RuntimeInformation": {
         "type": "Transitive",
         "resolved": "4.3.0",