diff --git a/src/ModMan/Web/Binds/DialogBinds.cpp b/src/ModMan/Web/Binds/DialogBinds.cpp
new file mode 100644
index 00000000..091a9dea
--- /dev/null
+++ b/src/ModMan/Web/Binds/DialogBinds.cpp
@@ -0,0 +1,123 @@
+#include "DialogBinds.h"
+
+#include "Web/Platform/DialogHandler.h"
+#include "Web/UiCommunication.h"
+
+#include "Json/JsonExtension.h"
+
+using namespace PLATFORM_NAMESPACE;
+
+namespace
+{
+    class FileDialogFilterDto
+    {
+    public:
+        std::string name;
+        std::string filter;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(FileDialogFilterDto, name, filter);
+
+    class OpenFileDialogDto
+    {
+    public:
+        std::optional<std::vector<FileDialogFilterDto>> filters;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(OpenFileDialogDto, filters);
+
+    class SaveFileDialogDto
+    {
+    public:
+        std::optional<std::vector<FileDialogFilterDto>> filters;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(SaveFileDialogDto, filters);
+
+    void ReplyWithDialogResult(webview::webview& wv, const std::string& id, const DialogCallbackResultType resultType, const std::optional<std::string>& result)
+    {
+        if (resultType == FAILED)
+            ui::PromiseReject(wv, id, result);
+        else
+            ui::PromiseResolve(wv, id, result);
+    }
+
+    void OpenFileDialogBind(webview::webview& wv, const std::string& id, const std::optional<OpenFileDialogDto>& dto)
+    {
+        OpenFileDialog dialog;
+        dialog.SetCallback(
+            [&wv, id](const DialogCallbackResultType resultType, const std::optional<std::string>& result)
+            {
+                ReplyWithDialogResult(wv, id, resultType, result);
+            });
+
+        if (dto && dto->filters)
+        {
+            for (auto& filter : *dto->filters)
+            {
+                dialog.AddFilter(filter.name, filter.filter);
+            }
+        }
+
+        dialog.OpenAsync();
+    }
+
+    void SaveFileDialogBind(webview::webview& wv, const std::string& id, const std::optional<SaveFileDialogDto>& dto)
+    {
+        SaveFileDialog dialog;
+        dialog.SetCallback(
+            [&wv, id](const DialogCallbackResultType resultType, const std::optional<std::string>& result)
+            {
+                ReplyWithDialogResult(wv, id, resultType, result);
+            });
+
+        if (dto && dto->filters)
+        {
+            for (auto& filter : *dto->filters)
+            {
+                dialog.AddFilter(filter.name, filter.filter);
+            }
+        }
+
+        dialog.OpenAsync();
+    }
+
+    void FolderSelectDialogBind(webview::webview& wv, const std::string& id)
+    {
+        FolderSelectDialog dialog;
+        dialog.SetCallback(
+            [&wv, id](const DialogCallbackResultType resultType, const std::optional<std::string>& result)
+            {
+                ReplyWithDialogResult(wv, id, resultType, result);
+            });
+
+        dialog.OpenAsync();
+    }
+} // namespace
+
+namespace ui
+{
+    void RegisterDialogHandlerBinds(webview::webview& wv)
+    {
+        BindAsync<std::optional<OpenFileDialogDto>>(wv,
+                                                    "openFileDialog",
+                                                    [&wv](const std::string& id, const std::optional<OpenFileDialogDto>& dto)
+                                                    {
+                                                        OpenFileDialogBind(wv, id, dto);
+                                                    });
+
+        BindAsync<std::optional<SaveFileDialogDto>>(wv,
+                                                    "saveFileDialog",
+                                                    [&wv](const std::string& id, const std::optional<SaveFileDialogDto>& dto)
+                                                    {
+                                                        SaveFileDialogBind(wv, id, dto);
+                                                    });
+
+        BindAsync(wv,
+                  "folderSelectDialog",
+                  [&wv](const std::string& id)
+                  {
+                      FolderSelectDialogBind(wv, id);
+                  });
+    }
+} // namespace ui
diff --git a/src/ModMan/Web/Binds/DialogBinds.h b/src/ModMan/Web/Binds/DialogBinds.h
new file mode 100644
index 00000000..2d5a923e
--- /dev/null
+++ b/src/ModMan/Web/Binds/DialogBinds.h
@@ -0,0 +1,8 @@
+#pragma once
+
+#include "Web/WebViewLib.h"
+
+namespace ui
+{
+    void RegisterDialogHandlerBinds(webview::webview& wv);
+}
diff --git a/src/ModMan/Web/Platform/AssetHandler.h b/src/ModMan/Web/Platform/AssetHandler.h
new file mode 100644
index 00000000..ebdb1ebf
--- /dev/null
+++ b/src/ModMan/Web/Platform/AssetHandler.h
@@ -0,0 +1,7 @@
+#pragma once
+
+#ifdef _WIN32
+#include "Windows/AssetHandlerWindows.h"
+#elif defined(__linux__)
+#include "Linux/AssetHandlerLinux.h"
+#endif
diff --git a/src/ModMan/Web/Platform/DialogHandler.h b/src/ModMan/Web/Platform/DialogHandler.h
new file mode 100644
index 00000000..09ed1eb8
--- /dev/null
+++ b/src/ModMan/Web/Platform/DialogHandler.h
@@ -0,0 +1,7 @@
+#pragma once
+
+#ifdef _WIN32
+#include "Windows/DialogHandlerWindows.h"
+#elif defined(__linux__)
+#include "Linux/DialogHandlerLinux.h"
+#endif
diff --git a/src/ModMan/Web/Gtk/AssetHandlerGtk.cpp b/src/ModMan/Web/Platform/Linux/AssetHandlerLinux.cpp
similarity index 87%
rename from src/ModMan/Web/Gtk/AssetHandlerGtk.cpp
rename to src/ModMan/Web/Platform/Linux/AssetHandlerLinux.cpp
index 3cec4a45..bb41be84 100644
--- a/src/ModMan/Web/Gtk/AssetHandlerGtk.cpp
+++ b/src/ModMan/Web/Platform/Linux/AssetHandlerLinux.cpp
@@ -1,4 +1,4 @@
-#include "AssetHandlerGtk.h"
+#include "AssetHandlerLinux.h"
 
 #if defined(WEBVIEW_PLATFORM_LINUX) && defined(WEBVIEW_GTK)
 
@@ -6,6 +6,9 @@
 
 #include <format>
 #include <iostream>
+#include <unordered_map>
+
+using namespace PLATFORM_NAMESPACE_LINUX;
 
 namespace
 {
@@ -34,9 +37,9 @@ namespace
     }
 } // namespace
 
-namespace gtk
+namespace PLATFORM_NAMESPACE_LINUX
 {
-    void InstallCustomProtocolHandler(webview::webview& wv)
+    void InstallAssetHandler(webview::webview& wv)
     {
         const auto widget = static_cast<GtkWidget*>(wv.browser_controller().value());
         const auto webView = WEBKIT_WEB_VIEW(widget);
@@ -46,6 +49,6 @@ namespace gtk
 
         webkit_web_context_register_uri_scheme(context, "modman", ModManUriSchemeRequestCb, NULL, nullptr);
     }
-} // namespace gtk
+} // namespace PLATFORM_NAMESPACE_LINUX
 
 #endif
diff --git a/src/ModMan/Web/Gtk/AssetHandlerGtk.h b/src/ModMan/Web/Platform/Linux/AssetHandlerLinux.h
similarity index 54%
rename from src/ModMan/Web/Gtk/AssetHandlerGtk.h
rename to src/ModMan/Web/Platform/Linux/AssetHandlerLinux.h
index 8a399dff..e8f49f2f 100644
--- a/src/ModMan/Web/Gtk/AssetHandlerGtk.h
+++ b/src/ModMan/Web/Platform/Linux/AssetHandlerLinux.h
@@ -1,16 +1,18 @@
 #pragma once
 
+#include "Web/Platform/Platform.h"
+
 #include <webview/macros.h>
 
 #if defined(WEBVIEW_PLATFORM_LINUX) && defined(WEBVIEW_GTK)
 
 #include "Web/WebViewLib.h"
 
-namespace gtk
+namespace PLATFORM_NAMESPACE_LINUX
 {
     constexpr auto URL_PREFIX = "modman://localhost/";
 
-    void InstallCustomProtocolHandler(webview::webview& wv);
-} // namespace gtk
+    void InstallAssetHandler(webview::webview& wv);
+} // namespace PLATFORM_NAMESPACE_LINUX
 
 #endif
diff --git a/src/ModMan/Web/Platform/Linux/DialogHandlerLinux.cpp b/src/ModMan/Web/Platform/Linux/DialogHandlerLinux.cpp
new file mode 100644
index 00000000..292d5e2e
--- /dev/null
+++ b/src/ModMan/Web/Platform/Linux/DialogHandlerLinux.cpp
@@ -0,0 +1,92 @@
+#include "DialogHandlerLinux.h"
+
+#ifdef __linux__
+
+#include <gtk/gtk.h>
+
+using namespace PLATFORM_NAMESPACE_LINUX;
+
+namespace
+{
+    bool InitGtk()
+    {
+#if GTK_MAJOR_VERSION >= 4
+        return gtk_init_check();
+#else
+        return gtk_init_check(nullptr, nullptr);
+#endif
+    }
+
+    void OpenFileDialog()
+    {
+#ifdef GDK_AVAILABLE_IN_4_10
+        auto* dialog = gtk_file_dialog_new();
+
+        gtk_file_dialog_open(dialog, nullptr, nullptr, [](GObject      *source,
+               GAsyncResult *result,
+               gpointer      user_data
+            ) -> void {
+
+               }, nullptr
+            );
+
+        g_object_unref(dialog);
+#endif
+    }
+
+    bool SetFilters(void* pFileOpen, const std::vector<FileDialogFilter>& filters)
+    {
+        if (filters.empty())
+            return true;
+
+        return false;
+    }
+
+    std::optional<std::string> ShowFileDialog()
+    {
+        std::optional<std::string> result = std::nullopt;
+
+        return result;
+    }
+} // namespace
+
+namespace PLATFORM_NAMESPACE_LINUX
+{
+    FileDialogFilter::FileDialogFilter(std::string name, std::string filter)
+        : m_name(std::move(name)),
+          m_filter(std::move(filter))
+    {
+    }
+
+    FileDialog::FileDialog() = default;
+
+    void FileDialog::AddFilter(std::string name, std::string filter)
+    {
+        m_filters.emplace_back(std::move(name), std::move(filter));
+    }
+
+    OpenFileDialog::OpenFileDialog() = default;
+
+    std::optional<std::string> OpenFileDialog::Open() const
+    {
+        if (!InitGtk())
+            return std::nullopt;
+
+        return std::nullopt;
+    }
+
+    SaveFileDialog::SaveFileDialog() = default;
+
+    std::optional<std::string> SaveFileDialog::Open() const
+    {
+        return std::nullopt;
+    }
+
+    FolderSelectDialog::FolderSelectDialog() = default;
+
+    std::optional<std::string> FolderSelectDialog::Open() const
+    {
+        return std::nullopt;
+    }
+} // namespace PLATFORM_NAMESPACE_LINUX
+#endif
diff --git a/src/ModMan/Web/Platform/Linux/DialogHandlerLinux.h b/src/ModMan/Web/Platform/Linux/DialogHandlerLinux.h
new file mode 100644
index 00000000..cc7e75b6
--- /dev/null
+++ b/src/ModMan/Web/Platform/Linux/DialogHandlerLinux.h
@@ -0,0 +1,70 @@
+#pragma once
+
+#ifdef __linux__
+
+#include "Web/Platform/Platform.h"
+
+#include <functional>
+#include <optional>
+#include <string>
+#include <vector>
+
+namespace PLATFORM_NAMESPACE_LINUX
+{
+    class FileDialogFilter
+    {
+    public:
+        FileDialogFilter(std::string name, std::string filter);
+
+        std::string m_name;
+        std::string m_filter;
+    };
+
+    class DialogWithCallback
+    {
+    public:
+        DialogWithCallback();
+
+        void SetCallback(std::function<void(std::optional<std::string> result)> callback);
+
+    protected:
+        std::function<void(std::optional<std::string> result)> m_callback;
+    };
+
+    class FileDialog : public DialogWithCallback
+    {
+    public:
+        FileDialog();
+
+        void AddFilter(std::string name, std::string filter);
+
+    protected:
+        std::vector<FileDialogFilter> m_filters;
+    };
+
+    class OpenFileDialog : public FileDialog
+    {
+    public:
+        OpenFileDialog();
+
+        void OpenAsync() const;
+    };
+
+    class SaveFileDialog : public FileDialog
+    {
+    public:
+        SaveFileDialog();
+
+        void OpenAsync() const;
+    };
+
+    class FolderSelectDialog : public DialogWithCallback
+    {
+    public:
+        FolderSelectDialog();
+
+        void OpenAsync() const;
+    };
+} // namespace PLATFORM_NAMESPACE_LINUX
+
+#endif
diff --git a/src/ModMan/Web/Platform/Platform.h b/src/ModMan/Web/Platform/Platform.h
new file mode 100644
index 00000000..e531deca
--- /dev/null
+++ b/src/ModMan/Web/Platform/Platform.h
@@ -0,0 +1,10 @@
+#pragma once
+
+#define PLATFORM_NAMESPACE_WINDOWS windows
+#define PLATFORM_NAMESPACE_LINUX linux
+
+#ifdef _WIN32
+#define PLATFORM_NAMESPACE PLATFORM_NAMESPACE_WINDOWS
+#elif defined(__linux__)
+#define PLATFORM_NAMESPACE PLATFORM_NAMESPACE_LINUX
+#endif
diff --git a/src/ModMan/Web/Edge/AssetHandlerEdge.cpp b/src/ModMan/Web/Platform/Windows/AssetHandlerWindows.cpp
similarity index 79%
rename from src/ModMan/Web/Edge/AssetHandlerEdge.cpp
rename to src/ModMan/Web/Platform/Windows/AssetHandlerWindows.cpp
index a336e4a5..ba400bd0 100644
--- a/src/ModMan/Web/Edge/AssetHandlerEdge.cpp
+++ b/src/ModMan/Web/Platform/Windows/AssetHandlerWindows.cpp
@@ -1,7 +1,8 @@
-#include "AssetHandlerEdge.h"
+#include "AssetHandlerWindows.h"
 
 #if defined(WEBVIEW_PLATFORM_WINDOWS) && defined(WEBVIEW_EDGE)
 
+#include "PlatformUtilsWindows.h"
 #include "Web/UiAssets.h"
 
 #include <Windows.h>
@@ -11,40 +12,14 @@
 #include <webview/detail/backends/win32_edge.hh>
 #include <wrl/event.h>
 
+using namespace PLATFORM_NAMESPACE_WINDOWS;
+
 namespace
 {
     constexpr auto LOCALHOST_PREFIX = "http://localhost:";
 
     std::unordered_map<std::string, UiFile> assetLookup;
 
-    std::string WideStringToString(const std::wstring& wideString)
-    {
-        if (wideString.empty())
-            return "";
-
-        const auto sizeNeeded = WideCharToMultiByte(CP_UTF8, 0, wideString.data(), static_cast<int>(wideString.size()), nullptr, 0, nullptr, nullptr);
-        if (sizeNeeded <= 0)
-            throw std::runtime_error(std::format("WideCharToMultiByte() failed: {}", sizeNeeded));
-
-        std::string result(sizeNeeded, 0);
-        WideCharToMultiByte(CP_UTF8, 0, wideString.data(), static_cast<int>(wideString.size()), result.data(), sizeNeeded, nullptr, nullptr);
-        return result;
-    }
-
-    std::wstring StringToWideString(const std::string& string)
-    {
-        if (string.empty())
-            return L"";
-
-        const auto sizeNeeded = MultiByteToWideChar(CP_UTF8, 0, string.data(), static_cast<int>(string.size()), nullptr, 0);
-        if (sizeNeeded <= 0)
-            throw std::runtime_error(std::format("MultiByteToWideChar() failed: {}", sizeNeeded));
-
-        std::wstring result(sizeNeeded, 0);
-        MultiByteToWideChar(CP_UTF8, 0, string.data(), static_cast<int>(string.size()), result.data(), sizeNeeded);
-        return result;
-    }
-
     std::wstring HeadersForAssetName(const std::string& assetName, const size_t contentLength)
     {
         std::wstringstream wss;
@@ -99,9 +74,9 @@ namespace
                 return S_OK;
 #endif
 
-            if (uri.starts_with(edge::URL_PREFIX))
+            if (uri.starts_with(URL_PREFIX))
             {
-                const auto asset = uri.substr(std::char_traits<char>::length(edge::URL_PREFIX) - 1);
+                const auto asset = uri.substr(std::char_traits<char>::length(URL_PREFIX) - 1);
 
                 const auto foundUiFile = assetLookup.find(asset);
                 if (foundUiFile != assetLookup.end())
@@ -142,9 +117,9 @@ namespace
     }
 } // namespace
 
-namespace edge
+namespace PLATFORM_NAMESPACE_WINDOWS
 {
-    void InstallCustomProtocolHandler(webview::webview& wv)
+    void InstallAssetHandler(webview::webview& wv)
     {
         assetLookup = ui::BuildUiFileLookup();
 
@@ -182,6 +157,6 @@ namespace edge
             std::cerr << "Failed to add resource requested filter\n";
         }
     }
-} // namespace edge
+} // namespace PLATFORM_NAMESPACE_WINDOWS
 
 #endif
diff --git a/src/ModMan/Web/Edge/AssetHandlerEdge.h b/src/ModMan/Web/Platform/Windows/AssetHandlerWindows.h
similarity index 54%
rename from src/ModMan/Web/Edge/AssetHandlerEdge.h
rename to src/ModMan/Web/Platform/Windows/AssetHandlerWindows.h
index fb01197b..b6475fd9 100644
--- a/src/ModMan/Web/Edge/AssetHandlerEdge.h
+++ b/src/ModMan/Web/Platform/Windows/AssetHandlerWindows.h
@@ -1,16 +1,18 @@
 #pragma once
 
+#include "Web/Platform/Platform.h"
+
 #include <webview/macros.h>
 
 #if defined(WEBVIEW_PLATFORM_WINDOWS) && defined(WEBVIEW_EDGE)
 
 #include "Web/WebViewLib.h"
 
-namespace edge
+namespace PLATFORM_NAMESPACE_WINDOWS
 {
     constexpr auto URL_PREFIX = "http://modman.local/";
 
-    void InstallCustomProtocolHandler(webview::webview& wv);
-} // namespace edge
+    void InstallAssetHandler(webview::webview& wv);
+} // namespace PLATFORM_NAMESPACE_WINDOWS
 
 #endif
diff --git a/src/ModMan/Web/Platform/Windows/DialogHandlerWindows.cpp b/src/ModMan/Web/Platform/Windows/DialogHandlerWindows.cpp
new file mode 100644
index 00000000..68885db2
--- /dev/null
+++ b/src/ModMan/Web/Platform/Windows/DialogHandlerWindows.cpp
@@ -0,0 +1,239 @@
+#include "DialogHandlerWindows.h"
+
+#ifdef _WIN32
+
+#include "PlatformUtilsWindows.h"
+
+#include <shobjidl.h>
+#include <thread>
+#include <windows.h>
+
+using namespace PLATFORM_NAMESPACE_WINDOWS;
+
+namespace
+{
+    bool SetFilters(IFileDialog* pFileOpen, const std::vector<FileDialogFilter>& filters)
+    {
+        if (filters.empty())
+            return true;
+
+        const auto filterCount = filters.size();
+        std::vector<COMDLG_FILTERSPEC> filterSpecs;
+        filterSpecs.reserve(filterCount + 1);
+
+        std::vector<std::wstring> filterStrings;
+        filterStrings.reserve(filterCount * 2);
+
+        for (auto i = 0u; i < filterCount; i++)
+        {
+            const auto& filter = filters[i];
+            COMDLG_FILTERSPEC filterSpec;
+
+            const auto& wName = filterStrings.emplace_back(StringToWideString(filter.m_name));
+            const auto& wSpec = filterStrings.emplace_back(StringToWideString(filter.m_filter));
+
+            filterSpec.pszName = wName.c_str();
+            filterSpec.pszSpec = wSpec.c_str();
+
+            filterSpecs.emplace_back(filterSpec);
+        }
+
+        COMDLG_FILTERSPEC wildCardSpec;
+        wildCardSpec.pszName = L"*.*";
+        wildCardSpec.pszSpec = L"*.*";
+        filterSpecs.emplace_back(wildCardSpec);
+
+        const auto result = pFileOpen->SetFileTypes(static_cast<UINT>(filterCount + 1), filterSpecs.data());
+
+        return SUCCEEDED(result);
+    }
+
+    DialogCallbackResultType ShowFileDialog(IFileDialog* pFileDialog, std::optional<std::string>& result)
+    {
+        DialogCallbackResultType resultType = FAILED;
+
+        auto hr = pFileDialog->Show(nullptr);
+        if (SUCCEEDED(hr))
+        {
+            IShellItem* pItem;
+            hr = pFileDialog->GetResult(&pItem);
+            if (SUCCEEDED(hr))
+            {
+                PWSTR pszFilePath;
+                hr = pItem->GetDisplayName(SIGDN_FILESYSPATH, &pszFilePath);
+
+                // Display the file name to the user.
+                if (SUCCEEDED(hr))
+                {
+                    result = WideStringToString(pszFilePath);
+                    CoTaskMemFree(pszFilePath);
+
+                    resultType = SUCCESSFUL;
+                }
+                pItem->Release();
+            }
+        }
+        else if (HRESULT_FROM_WIN32(ERROR_CANCELLED) == hr)
+        {
+            resultType = CANCELLED;
+        }
+
+        return resultType;
+    }
+} // namespace
+
+namespace PLATFORM_NAMESPACE_WINDOWS
+{
+    DialogWithCallback::DialogWithCallback() = default;
+
+    void DialogWithCallback::SetCallback(callback_t callback)
+    {
+        m_callback = std::move(callback);
+    }
+
+    FileDialogFilter::FileDialogFilter(std::string name, std::string filter)
+        : m_name(std::move(name)),
+          m_filter(std::move(filter))
+    {
+    }
+
+    FileDialog::FileDialog() = default;
+
+    void FileDialog::AddFilter(std::string name, std::string filter)
+    {
+        m_filters.emplace_back(std::move(name), std::move(filter));
+    }
+
+    OpenFileDialog::OpenFileDialog() = default;
+
+    void OpenFileDialog::OpenAsync()
+    {
+        // Move data out of the dialog object since it may be destroyed
+        callback_t callback(std::move(m_callback));
+        std::vector filters(std::move(m_filters));
+
+        // Windows dialogs are not asynchronous -> Spawn another thread
+        std::thread(
+            [callback, filters]
+            {
+                const auto initResult = CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);
+                if (!SUCCEEDED(initResult))
+                {
+                    callback(FAILED, std::nullopt);
+                    return;
+                }
+
+                DialogCallbackResultType resultType = FAILED;
+                std::optional<std::string> result = std::nullopt;
+                IFileOpenDialog* pFileOpen;
+
+                const auto hr = CoCreateInstance(CLSID_FileOpenDialog, nullptr, CLSCTX_ALL, IID_IFileOpenDialog, reinterpret_cast<void**>(&pFileOpen));
+
+                if (SUCCEEDED(hr) && SetFilters(pFileOpen, filters))
+                {
+                    resultType = ShowFileDialog(pFileOpen, result);
+                    pFileOpen->Release();
+                }
+
+                CoUninitialize();
+
+                callback(resultType, result);
+            })
+            .detach();
+    }
+
+    SaveFileDialog::SaveFileDialog() = default;
+
+    void SaveFileDialog::OpenAsync()
+    {
+        // Move data out of the dialog object since it may be destroyed
+        callback_t callback(std::move(m_callback));
+        std::vector filters(std::move(m_filters));
+
+        // Windows dialogs are not asynchronous -> Spawn another thread
+        std::thread(
+            [callback, filters]
+            {
+                const auto initResult = CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);
+                if (!SUCCEEDED(initResult))
+                {
+                    callback(FAILED, std::nullopt);
+                    return;
+                }
+
+                DialogCallbackResultType resultType = FAILED;
+                std::optional<std::string> result = std::nullopt;
+                IFileSaveDialog* pFileSave;
+
+                const auto hr = CoCreateInstance(CLSID_FileSaveDialog, nullptr, CLSCTX_ALL, IID_IFileSaveDialog, reinterpret_cast<void**>(&pFileSave));
+
+                if (SUCCEEDED(hr) && SetFilters(pFileSave, filters))
+                {
+                    resultType = ShowFileDialog(pFileSave, result);
+                    pFileSave->Release();
+                }
+
+                CoUninitialize();
+
+                callback(resultType, result);
+            })
+            .detach();
+    }
+
+    FolderSelectDialog::FolderSelectDialog() = default;
+
+    void FolderSelectDialog::OpenAsync()
+    {
+        // Move data out of the dialog object since it may be destroyed
+        callback_t callback(std::move(m_callback));
+
+        // Windows dialogs are not asynchronous -> Spawn another thread
+        std::thread(
+            [callback]
+            {
+                const auto initResult = CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);
+                if (!SUCCEEDED(initResult))
+                {
+                    callback(FAILED, std::nullopt);
+                    return;
+                }
+
+                std::optional<std::string> result = std::nullopt;
+                IFileOpenDialog* pFileOpen;
+
+                const auto hr = CoCreateInstance(CLSID_FileOpenDialog, nullptr, CLSCTX_ALL, IID_IFileOpenDialog, reinterpret_cast<void**>(&pFileOpen));
+                if (!SUCCEEDED(hr))
+                {
+                    CoUninitialize();
+                    callback(FAILED, std::nullopt);
+                    return;
+                }
+
+                DWORD dwOptions = 0;
+                if (!SUCCEEDED(pFileOpen->GetOptions(&dwOptions)))
+                {
+                    pFileOpen->Release();
+                    CoUninitialize();
+                    callback(FAILED, std::nullopt);
+                    return;
+                }
+
+                if (!SUCCEEDED(pFileOpen->SetOptions(dwOptions | FOS_PICKFOLDERS)))
+                {
+                    pFileOpen->Release();
+                    CoUninitialize();
+                    callback(FAILED, std::nullopt);
+                    return;
+                }
+
+                const auto resultType = ShowFileDialog(pFileOpen, result);
+
+                pFileOpen->Release();
+                CoUninitialize();
+
+                callback(resultType, result);
+            })
+            .detach();
+    }
+} // namespace PLATFORM_NAMESPACE_WINDOWS
+#endif
diff --git a/src/ModMan/Web/Platform/Windows/DialogHandlerWindows.h b/src/ModMan/Web/Platform/Windows/DialogHandlerWindows.h
new file mode 100644
index 00000000..0b60db85
--- /dev/null
+++ b/src/ModMan/Web/Platform/Windows/DialogHandlerWindows.h
@@ -0,0 +1,80 @@
+#pragma once
+
+#ifdef _WIN32
+
+#include "Web/Platform/Platform.h"
+
+#include <cstdint>
+#include <functional>
+#include <optional>
+#include <string>
+#include <vector>
+
+namespace PLATFORM_NAMESPACE_WINDOWS
+{
+    enum DialogCallbackResultType : std::uint8_t
+    {
+        SUCCESSFUL,
+        CANCELLED,
+        FAILED
+    };
+
+    class DialogWithCallback
+    {
+    public:
+        using callback_t = std::function<void(DialogCallbackResultType resultType, std::optional<std::string> result)>;
+
+        DialogWithCallback();
+
+        void SetCallback(callback_t callback);
+
+    protected:
+        callback_t m_callback;
+    };
+
+    class FileDialogFilter
+    {
+    public:
+        FileDialogFilter(std::string name, std::string filter);
+
+        std::string m_name;
+        std::string m_filter;
+    };
+
+    class FileDialog : public DialogWithCallback
+    {
+    public:
+        FileDialog();
+
+        void AddFilter(std::string name, std::string filter);
+
+    protected:
+        std::vector<FileDialogFilter> m_filters;
+    };
+
+    class OpenFileDialog : public FileDialog
+    {
+    public:
+        OpenFileDialog();
+
+        void OpenAsync();
+    };
+
+    class SaveFileDialog : public FileDialog
+    {
+    public:
+        SaveFileDialog();
+
+        void OpenAsync();
+    };
+
+    class FolderSelectDialog : public DialogWithCallback
+    {
+    public:
+        FolderSelectDialog();
+
+        void OpenAsync();
+    };
+} // namespace PLATFORM_NAMESPACE_WINDOWS
+
+#endif
diff --git a/src/ModMan/Web/Platform/Windows/PlatformUtilsWindows.cpp b/src/ModMan/Web/Platform/Windows/PlatformUtilsWindows.cpp
new file mode 100644
index 00000000..4b5497a0
--- /dev/null
+++ b/src/ModMan/Web/Platform/Windows/PlatformUtilsWindows.cpp
@@ -0,0 +1,40 @@
+#include "PlatformUtilsWindows.h"
+
+#ifdef _WIN32
+
+#include <exception>
+#include <format>
+#include <Windows.h>
+
+namespace PLATFORM_NAMESPACE_WINDOWS
+{
+    std::string WideStringToString(const std::wstring& wideString)
+    {
+        if (wideString.empty())
+            return "";
+
+        const auto sizeNeeded = WideCharToMultiByte(CP_UTF8, 0, wideString.data(), static_cast<int>(wideString.size()), nullptr, 0, nullptr, nullptr);
+        if (sizeNeeded <= 0)
+            throw std::runtime_error(std::format("WideCharToMultiByte() failed: {}", sizeNeeded));
+
+        std::string result(sizeNeeded, 0);
+        WideCharToMultiByte(CP_UTF8, 0, wideString.data(), static_cast<int>(wideString.size()), result.data(), sizeNeeded, nullptr, nullptr);
+        return result;
+    }
+
+    std::wstring StringToWideString(const std::string& string)
+    {
+        if (string.empty())
+            return L"";
+
+        const auto sizeNeeded = MultiByteToWideChar(CP_UTF8, 0, string.data(), static_cast<int>(string.size()), nullptr, 0);
+        if (sizeNeeded <= 0)
+            throw std::runtime_error(std::format("MultiByteToWideChar() failed: {}", sizeNeeded));
+
+        std::wstring result(sizeNeeded, 0);
+        MultiByteToWideChar(CP_UTF8, 0, string.data(), static_cast<int>(string.size()), result.data(), sizeNeeded);
+        return result;
+    }
+} // namespace PLATFORM_NAMESPACE_WINDOWS
+
+#endif
diff --git a/src/ModMan/Web/Platform/Windows/PlatformUtilsWindows.h b/src/ModMan/Web/Platform/Windows/PlatformUtilsWindows.h
new file mode 100644
index 00000000..0edb4b86
--- /dev/null
+++ b/src/ModMan/Web/Platform/Windows/PlatformUtilsWindows.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#ifdef _WIN32
+
+#include "Web/Platform/Platform.h"
+
+#include <optional>
+#include <string>
+
+namespace PLATFORM_NAMESPACE_WINDOWS
+{
+    std::string WideStringToString(const std::wstring& wideString);
+    std::wstring StringToWideString(const std::string& string);
+} // namespace PLATFORM_NAMESPACE_WINDOWS
+
+#endif
diff --git a/src/ModMan/Web/UiCommunication.h b/src/ModMan/Web/UiCommunication.h
index df0935ba..f5f7c2c3 100644
--- a/src/ModMan/Web/UiCommunication.h
+++ b/src/ModMan/Web/UiCommunication.h
@@ -42,7 +42,6 @@ namespace ui
                     }
 
                     fn(std::move(param));
-
                     return "";
                 });
     }
@@ -81,7 +80,6 @@ namespace ui
                     }
 
                     auto result = fn(std::move(param));
-
                     return nlohmann::json(result).dump();
                 });
     }
@@ -121,6 +119,7 @@ namespace ui
                 }
 
                 fn(id, std::move(param));
+                return "";
             },
             nullptr);
     }
diff --git a/src/ModMan/main.cpp b/src/ModMan/main.cpp
index 1929ef9c..736ae360 100644
--- a/src/ModMan/main.cpp
+++ b/src/ModMan/main.cpp
@@ -1,7 +1,7 @@
 #include "GitVersion.h"
-#include "Web/Edge/AssetHandlerEdge.h"
-#include "Web/Gtk/AssetHandlerGtk.h"
+#include "Web/Platform/AssetHandler.h"
 #include "Web/UiCommunication.h"
+#include "Web/Binds/DialogBinds.h"
 #include "Web/ViteAssets.h"
 #include "Web/WebViewLib.h"
 
@@ -13,6 +13,7 @@
 #include <thread>
 
 using namespace std::string_literals;
+using namespace PLATFORM_NAMESPACE;
 
 namespace
 {
@@ -55,6 +56,8 @@ namespace
             w.set_size(1280, 640, WEBVIEW_HINT_NONE);
             w.set_size(480, 320, WEBVIEW_HINT_MIN);
 
+            ui::RegisterDialogHandlerBinds(w);
+
             // A binding that counts up or down and immediately returns the new value.
             ui::Bind<std::string, std::string>(w,
                                                "greet",
@@ -64,36 +67,12 @@ namespace
                                                    return std::format("Hello from C++ {}!", name);
                                                });
 
-            // A binding that counts up or down and immediately returns the new value.
-            ui::Bind(w,
-                     "debug",
-                     []()
-                     {
-                         con::info("Debug");
-                     });
-
-            // A binding that creates a new thread and returns the result at a later time.
-            ui::BindAsync(w,
-                          "compute",
-                          [&](const std::string& id)
-                          {
-                              // Create a thread and forget about it for the sake of simplicity.
-                              std::thread(
-                                  [&, id]
-                                  {
-                                      // Simulate load.
-                                      std::this_thread::sleep_for(std::chrono::seconds(5));
-                                      ui::PromiseResolve(w, id, 42);
-                                  })
-                                  .detach();
-                          });
-
 #if defined(WEBVIEW_PLATFORM_WINDOWS) && defined(WEBVIEW_EDGE)
-            edge::InstallCustomProtocolHandler(w);
-            constexpr auto urlPrefix = edge::URL_PREFIX;
+            InstallAssetHandler(w);
+            constexpr auto urlPrefix = URL_PREFIX;
 #elif defined(WEBVIEW_PLATFORM_LINUX) && defined(WEBVIEW_GTK)
-            gtk::InstallCustomProtocolHandler(w);
-            constexpr auto urlPrefix = gtk::URL_PREFIX;
+            InstallAssetHandler(w);
+            constexpr auto urlPrefix = URL_PREFIX;
 #else
 #error Unsupported platform
 #endif
diff --git a/src/ModManUi/src/App.vue b/src/ModManUi/src/App.vue
index c906c7d3..1ff66ed6 100644
--- a/src/ModManUi/src/App.vue
+++ b/src/ModManUi/src/App.vue
@@ -4,6 +4,7 @@ import { webviewBinds, webviewAddEventListener, webviewRemoveEventListener } fro
 
 const greetMsg = ref("");
 const lastPersonGreeted = ref("");
+const lastPath = ref("");
 const name = ref("");
 
 async function greet() {
@@ -14,6 +15,11 @@ function onPersonGreeted(person: string) {
   lastPersonGreeted.value = person;
 }
 
+async function onOpenFastfileClick() {
+  lastPath.value =
+    (await webviewBinds.openFileDialog({ filters: [{ name: "Fastfiles", filter: "*.ff" }] })) ?? "";
+}
+
 webviewAddEventListener("greeting", onPersonGreeted);
 
 onUnmounted(() => webviewRemoveEventListener("greeting", onPersonGreeted));
@@ -30,6 +36,10 @@ onUnmounted(() => webviewRemoveEventListener("greeting", onPersonGreeted));
     </form>
     <p>{{ greetMsg }}</p>
     <p>The last person greeted is: {{ lastPersonGreeted }}</p>
+    <p>
+      <button @click="onOpenFastfileClick">Open fastfile</button>
+      <span>The last path: {{ lastPath }}</span>
+    </p>
   </main>
 </template>
 
diff --git a/src/ModManUi/src/native/DialogBinds.ts b/src/ModManUi/src/native/DialogBinds.ts
new file mode 100644
index 00000000..8c7e66b7
--- /dev/null
+++ b/src/ModManUi/src/native/DialogBinds.ts
@@ -0,0 +1,18 @@
+export interface FileDialogFilterDto {
+  name: string;
+  filter: string;
+}
+
+export interface OpenFileDialogDto {
+  filters?: FileDialogFilterDto[];
+}
+
+export interface SaveFileDialogDto {
+  filters?: FileDialogFilterDto[];
+}
+
+export interface DialogBinds {
+  openFileDialog(options?: OpenFileDialogDto): string | null;
+  saveFileDialog(options?: SaveFileDialogDto): string | null;
+  folderSelectDialog(): string | null;
+}
diff --git a/src/ModManUi/src/native.ts b/src/ModManUi/src/native/index.ts
similarity index 84%
rename from src/ModManUi/src/native.ts
rename to src/ModManUi/src/native/index.ts
index d2cc9a66..ae61f41f 100644
--- a/src/ModManUi/src/native.ts
+++ b/src/ModManUi/src/native/index.ts
@@ -1,6 +1,9 @@
-export interface NativeMethods {
-  greet: (name: string) => Promise<string>;
-}
+import type { DialogBinds } from "./DialogBinds";
+
+
+export type NativeMethods = {
+  greet(name: string): Promise<string>;
+} & DialogBinds;
 
 interface NativeEventMap {
   greeting: string;
diff --git a/src/ObjCommon/Json/JsonExtension.h b/src/Utils/Json/JsonExtension.h
similarity index 97%
rename from src/ObjCommon/Json/JsonExtension.h
rename to src/Utils/Json/JsonExtension.h
index 897dc4fe..7f2b761b 100644
--- a/src/ObjCommon/Json/JsonExtension.h
+++ b/src/Utils/Json/JsonExtension.h
@@ -3,7 +3,12 @@
 // Credits to
 // https://www.kdab.com/jsonify-with-nlohmann-json/
 
+#ifdef HAS_NLOHMANN_JSON
+
+#pragma warning(push, 0)
 #include <nlohmann/json.hpp>
+#pragma warning(pop)
+
 #include <optional>
 
 // partial specialization (full specialization works too)
@@ -56,3 +61,5 @@ namespace nlohmann
     {                                                                                                                                                          \
         NLOHMANN_JSON_EXPAND(NLOHMANN_JSON_PASTE(EXTEND_JSON_FROM, __VA_ARGS__))                                                                               \
     }
+
+#endif
diff --git a/thirdparty/json.lua b/thirdparty/json.lua
index ddca7815..c24b2e6c 100644
--- a/thirdparty/json.lua
+++ b/thirdparty/json.lua
@@ -3,7 +3,8 @@ json = {}
 function json:include(includes)
 	if includes:handle(self:name()) then
 		defines {
-			"JSON_DIAGNOSTICS=1"
+			"JSON_DIAGNOSTICS=1",
+			"HAS_NLOHMANN_JSON"
 		}
 		includedirs {
 			path.join(ThirdPartyFolder(), "json", "single_include")