diff --git a/Code/Framework/AzCore/AzCore/std/string/conversions.h b/Code/Framework/AzCore/AzCore/std/string/conversions.h
index 235eb188d1..473c327143 100644
--- a/Code/Framework/AzCore/AzCore/std/string/conversions.h
+++ b/Code/Framework/AzCore/AzCore/std/string/conversions.h
@@ -338,7 +338,7 @@ namespace AZStd
         if (srcLen > 0)
         {
             char* endStr = Internal::WCharTPlatformConverter<>::to_string(dest, destSize, str, str + srcLen);
-            if (*(endStr - 1) != '\0')
+            if (endStr < (dest + destSize) && *(endStr - 1) != '\0')
             {
                 *endStr = '\0'; // copy null terminator
             }
@@ -495,7 +495,7 @@ namespace AZStd
         if (srcLen > 0)
         {
             wchar_t* endWStr = Internal::WCharTPlatformConverter<>::to_wstring(dest, destSize, str, str + srcLen);
-            if (*(endWStr - 1) != '\0')
+            if (endWStr < (dest + destSize) && *(endWStr - 1) != '\0')
             {
                 *endWStr = '\0'; // copy null terminator
             }
diff --git a/Code/Framework/AzCore/AzCore/std/string/utf8/unchecked.h b/Code/Framework/AzCore/AzCore/std/string/utf8/unchecked.h
index cfc917ddc4..7199c58d3e 100644
--- a/Code/Framework/AzCore/AzCore/std/string/utf8/unchecked.h
+++ b/Code/Framework/AzCore/AzCore/std/string/utf8/unchecked.h
@@ -251,6 +251,54 @@ namespace Utf8::Unchecked
 
         return result;
     }
+
+    static constexpr size_t utf8_codepoint_length(AZ::u32 cp)
+    {
+        if (cp < 0x80)
+        {
+            return 1;
+        }
+        else if (cp < 0x800)
+        {
+            return 2;
+        }
+        else if (cp < 0x10000)
+        {
+            return 3;
+        }
+        return 4;
+    }
+
+    template <typename u16bit_iterator>
+    size_t utf16ToUtf8BytesRequired(u16bit_iterator start, u16bit_iterator end)
+    {
+        size_t bytesRequired = 0;
+        while (start != end)
+        {
+            AZ::u32 cp = Utf8::Internal::mask16(*start++);
+            // Take care of surrogate pairs first
+            if (Utf8::Internal::is_lead_surrogate(cp))
+            {
+                AZ::u32 trail_surrogate = Utf8::Internal::mask16(*start++);
+                cp = (cp << 10) + trail_surrogate + Internal::SURROGATE_OFFSET;
+            }
+            bytesRequired += utf8_codepoint_length(cp);
+        }
+        return bytesRequired;
+    }
+
+    template <typename u32bit_iterator>
+    size_t utf32ToUtf8BytesRequired(u32bit_iterator start, u32bit_iterator end)
+    {
+        size_t bytesRequired = 0;
+        while (start != end)
+        {
+            bytesRequired += utf8_codepoint_length(*start++);
+        }
+        return bytesRequired;
+    }
+
+
 } // namespace Utf8::Unchecked
 
 
diff --git a/Code/Framework/AzCore/Platform/Common/WinAPI/AzCore/Utils/Utils_WinAPI.cpp b/Code/Framework/AzCore/Platform/Common/WinAPI/AzCore/Utils/Utils_WinAPI.cpp
index dc104668be..4d8c9c8cfc 100644
--- a/Code/Framework/AzCore/Platform/Common/WinAPI/AzCore/Utils/Utils_WinAPI.cpp
+++ b/Code/Framework/AzCore/Platform/Common/WinAPI/AzCore/Utils/Utils_WinAPI.cpp
@@ -31,7 +31,7 @@ namespace AZ
             // Platform specific get exe path: http://stackoverflow.com/a/1024937
             // https://docs.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-getmodulefilenamea
             wchar_t pathBufferW[AZ::IO::MaxPathLength] = { 0 };
-            const DWORD pathLen = GetModuleFileNameW(nullptr, pathBufferW, static_cast<DWORD>(exeStorageSize));
+            const DWORD pathLen = GetModuleFileNameW(nullptr, pathBufferW, static_cast<DWORD>(AZStd::size(pathBufferW)));
             const DWORD errorCode = GetLastError();
             if (pathLen == exeStorageSize && errorCode == ERROR_INSUFFICIENT_BUFFER)
             {
@@ -43,7 +43,15 @@ namespace AZ
             }
             else
             {
-                AZStd::to_string(exeStorageBuffer, exeStorageSize, pathBufferW);
+                size_t utf8PathSize = Utf8::Unchecked::utf16ToUtf8BytesRequired(pathBufferW, pathBufferW + pathLen);
+                if (utf8PathSize >= exeStorageSize)
+                {
+                    result.m_pathStored = ExecutablePathResult::BufferSizeNotLargeEnough;
+                }
+                else
+                {
+                    AZStd::to_string(exeStorageBuffer, exeStorageSize, pathBufferW);
+                }
             }
 
             return result;
diff --git a/Code/Framework/AzCore/Platform/Windows/AzCore/Debug/StackTracer_Windows.cpp b/Code/Framework/AzCore/Platform/Windows/AzCore/Debug/StackTracer_Windows.cpp
index 8a99616de3..6cfaf1703b 100644
--- a/Code/Framework/AzCore/Platform/Windows/AzCore/Debug/StackTracer_Windows.cpp
+++ b/Code/Framework/AzCore/Platform/Windows/AzCore/Debug/StackTracer_Windows.cpp
@@ -90,7 +90,7 @@ namespace AZ {
             {
             case CBA_EVENT:
                 evt = (PIMAGEHLP_CBA_EVENT)CallbackData;
-                _tprintf(_T("%s"), evt->desc);
+                printf("%s", evt->desc);
                 break;
 
             default:
diff --git a/Code/Legacy/CryCommon/CryTypeInfo.cpp b/Code/Legacy/CryCommon/CryTypeInfo.cpp
index b1f7f20601..82743f7eef 100644
--- a/Code/Legacy/CryCommon/CryTypeInfo.cpp
+++ b/Code/Legacy/CryCommon/CryTypeInfo.cpp
@@ -132,9 +132,7 @@ const CTypeInfo&PtrTypeInfo()
 // bool
 AZStd::string ToString(bool const& val)
 {
-    static AZStd::fixed_string<5> sTrue = "true";
-    static AZStd::fixed_string<6> sFalse = "false";
-    return val ? sTrue.c_str() : sFalse.c_str();
+    return val ? "true" : "false";
 }
 
 bool FromString(bool& val, cstr s)
diff --git a/Code/Tools/SceneAPI/SceneCore/DataTypes/Rules/IMeshAdvancedRule.h b/Code/Tools/SceneAPI/SceneCore/DataTypes/Rules/IMeshAdvancedRule.h
index 48310091b3..04ed3f0949 100644
--- a/Code/Tools/SceneAPI/SceneCore/DataTypes/Rules/IMeshAdvancedRule.h
+++ b/Code/Tools/SceneAPI/SceneCore/DataTypes/Rules/IMeshAdvancedRule.h
@@ -19,7 +19,7 @@ namespace AZ
     {
         namespace DataTypes
         {
-            static AZStd::string s_advancedDisabledString = "Disabled";
+            static const char* s_advancedDisabledString = "Disabled";
 
             class IMeshAdvancedRule
                 : public IRule