diff --git a/core/fpdfdoc/cpdf_metadata.cpp b/core/fpdfdoc/cpdf_metadata.cpp
index 99fd965..19f5791 100644
--- a/core/fpdfdoc/cpdf_metadata.cpp
+++ b/core/fpdfdoc/cpdf_metadata.cpp
@@ -6,6 +6,8 @@
 
 #include "core/fpdfdoc/cpdf_metadata.h"
 
+#include <memory>
+
 #include "core/fpdfapi/parser/cpdf_stream.h"
 #include "core/fpdfapi/parser/cpdf_stream_acc.h"
 #include "core/fxcrt/cfx_readonlymemorystream.h"
@@ -18,15 +20,16 @@
 
 void CheckForSharedFormInternal(CFX_XMLElement* element,
                                 std::vector<UnsupportedFeature>* unsupported) {
-  WideString attr = element->GetAttribute(L"xmlns:adhocwf");
-  if (attr == L"http://ns.adobe.com/AcrobatAdhocWorkflow/1.0/") {
+  WideString attr =
+      element->GetAttribute(WideString::FromASCII("xmlns:adhocwf"));
+  if (attr.EqualsASCII("http://ns.adobe.com/AcrobatAdhocWorkflow/1.0/")) {
     for (const auto* child = element->GetFirstChild(); child;
          child = child->GetNextSibling()) {
       if (child->GetType() != FX_XMLNODE_Element)
         continue;
 
       const auto* child_elem = static_cast<const CFX_XMLElement*>(child);
-      if (child_elem->GetName() != L"adhocwf:workflowType")
+      if (!child_elem->GetName().EqualsASCII("adhocwf:workflowType"))
         continue;
 
       switch (child_elem->GetTextData().GetInteger()) {
diff --git a/core/fxcrt/xml/cfx_xmlinstruction.cpp b/core/fxcrt/xml/cfx_xmlinstruction.cpp
index 73fe548..2f8cfef 100644
--- a/core/fxcrt/xml/cfx_xmlinstruction.cpp
+++ b/core/fxcrt/xml/cfx_xmlinstruction.cpp
@@ -32,16 +32,16 @@
 }
 
 bool CFX_XMLInstruction::IsOriginalXFAVersion() const {
-  return name_ == L"originalXFAVersion";
+  return name_.EqualsASCII("originalXFAVersion");
 }
 
 bool CFX_XMLInstruction::IsAcrobat() const {
-  return name_ == L"acrobat";
+  return name_.EqualsASCII("acrobat");
 }
 
 void CFX_XMLInstruction::Save(
     const RetainPtr<IFX_SeekableWriteStream>& pXMLStream) {
-  if (name_.CompareNoCase(L"xml") == 0) {
+  if (name_.EqualsASCIINoCase("xml")) {
     pXMLStream->WriteString("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
     return;
   }
diff --git a/core/fxcrt/xml/cfx_xmlparser.cpp b/core/fxcrt/xml/cfx_xmlparser.cpp
index 047c546..e636f10 100644
--- a/core/fxcrt/xml/cfx_xmlparser.cpp
+++ b/core/fxcrt/xml/cfx_xmlparser.cpp
@@ -165,8 +165,8 @@
             current_parser_state = FDE_XmlSyntaxState::TargetData;
 
             WideString target_name = GetTextData();
-            if (target_name == L"originalXFAVersion" ||
-                target_name == L"acrobat") {
+            if (target_name.EqualsASCII("originalXFAVersion") ||
+                target_name.EqualsASCII("acrobat")) {
               auto* node = doc->CreateNode<CFX_XMLInstruction>(target_name);
               current_node_->AppendChild(node);
               current_node_ = node;
diff --git a/fxjs/cfxjse_engine.cpp b/fxjs/cfxjse_engine.cpp
index d46c4bb..bfea7a4 100644
--- a/fxjs/cfxjse_engine.cpp
+++ b/fxjs/cfxjse_engine.cpp
@@ -300,7 +300,7 @@
       pOriginalObject->GetDocument()->GetScriptContext();
   CXFA_Object* pObject =
       lpScriptContext->GetVariablesThis(pOriginalObject, false);
-  if (wsPropName == L"xfa") {
+  if (wsPropName.EqualsASCII("xfa")) {
     CFXJSE_Value* pValue = lpScriptContext->GetJSValueFromMap(
         lpScriptContext->GetDocument()->GetRoot());
     pReturnValue->Assign(pValue);
diff --git a/fxjs/cfxjse_resolveprocessor.cpp b/fxjs/cfxjse_resolveprocessor.cpp
index 6dd4d0c..b13f394 100644
--- a/fxjs/cfxjse_resolveprocessor.cpp
+++ b/fxjs/cfxjse_resolveprocessor.cpp
@@ -627,9 +627,9 @@
   ASSERT(iFoundCount == pdfium::CollectionSize<int32_t>(rnd.m_Objects));
   WideString wsExpression;
   CXFA_Script::Type eLangType = CXFA_Script::Type::Unknown;
-  if (wsCondition.Left(2) == L".[" && wsCondition.Last() == L']')
+  if (wsCondition.Left(2).EqualsASCII(".[") && wsCondition.Last() == L']')
     eLangType = CXFA_Script::Type::Formcalc;
-  else if (wsCondition.Left(2) == L".(" && wsCondition.Last() == L')')
+  else if (wsCondition.Left(2).EqualsASCII(".(") && wsCondition.Last() == L')')
     eLangType = CXFA_Script::Type::Javascript;
   else
     return;
diff --git a/fxjs/cjs_color.cpp b/fxjs/cjs_color.cpp
index e51cf54..fa1d805 100644
--- a/fxjs/cjs_color.cpp
+++ b/fxjs/cjs_color.cpp
@@ -91,7 +91,7 @@
 
   WideString sSpace =
       pRuntime->ToWideString(pRuntime->GetArrayElement(array, 0));
-  if (sSpace == L"T")
+  if (sSpace.EqualsASCII("T"))
     return CFX_Color(CFX_Color::kTransparent);
 
   float d1 = 0;
@@ -99,8 +99,7 @@
     d1 = static_cast<float>(
         pRuntime->ToDouble(pRuntime->GetArrayElement(array, 1)));
   }
-
-  if (sSpace == L"G")
+  if (sSpace.EqualsASCII("G"))
     return CFX_Color(CFX_Color::kGray, d1);
 
   float d2 = 0;
@@ -113,8 +112,7 @@
     d3 = static_cast<float>(
         pRuntime->ToDouble(pRuntime->GetArrayElement(array, 3)));
   }
-
-  if (sSpace == L"RGB")
+  if (sSpace.EqualsASCII("RGB"))
     return CFX_Color(CFX_Color::kRGB, d1, d2, d3);
 
   float d4 = 0;
@@ -122,7 +120,7 @@
     d4 = static_cast<float>(
         pRuntime->ToDouble(pRuntime->GetArrayElement(array, 4)));
   }
-  if (sSpace == L"CMYK")
+  if (sSpace.EqualsASCII("CMYK"))
     return CFX_Color(CFX_Color::kCMYK, d1, d2, d3, d4);
 
   return CFX_Color();
@@ -280,13 +278,13 @@
 
   WideString sDestSpace = pRuntime->ToWideString(params[1]);
   int nColorType = CFX_Color::kTransparent;
-  if (sDestSpace == L"T")
+  if (sDestSpace.EqualsASCII("T"))
     nColorType = CFX_Color::kTransparent;
-  else if (sDestSpace == L"G")
+  else if (sDestSpace.EqualsASCII("G"))
     nColorType = CFX_Color::kGray;
-  else if (sDestSpace == L"RGB")
+  else if (sDestSpace.EqualsASCII("RGB"))
     nColorType = CFX_Color::kRGB;
-  else if (sDestSpace == L"CMYK")
+  else if (sDestSpace.EqualsASCII("CMYK"))
     nColorType = CFX_Color::kCMYK;
 
   CFX_Color color =
diff --git a/fxjs/cjs_global.cpp b/fxjs/cjs_global.cpp
index 523d88e..57c5849 100644
--- a/fxjs/cjs_global.cpp
+++ b/fxjs/cjs_global.cpp
@@ -222,9 +222,10 @@
 }
 
 CJS_Result CJS_Global::QueryProperty(const wchar_t* propname) {
-  if (WideString(propname) != L"setPersistent")
-    return CJS_Result::Failure(JSMessage::kUnknownProperty);
-  return CJS_Result::Success();
+  if (WideString(propname).EqualsASCII("setPersistent"))
+    return CJS_Result::Success();
+
+  return CJS_Result::Failure(JSMessage::kUnknownProperty);
 }
 
 CJS_Result CJS_Global::DelProperty(CJS_Runtime* pRuntime,
diff --git a/fxjs/xfa/cjx_boolean.cpp b/fxjs/xfa/cjx_boolean.cpp
index 7ca3889..1830894 100644
--- a/fxjs/xfa/cjx_boolean.cpp
+++ b/fxjs/xfa/cjx_boolean.cpp
@@ -23,8 +23,7 @@
                                bool bSetting,
                                XFA_Attribute eAttribute) {
   if (!bSetting) {
-    WideString wsValue = GetContent(true);
-    pValue->SetBoolean(wsValue == L"1");
+    pValue->SetBoolean(GetContent(true).EqualsASCII("1"));
     return;
   }
 
diff --git a/fxjs/xfa/cjx_field.cpp b/fxjs/xfa/cjx_field.cpp
index d22cf4e..a80bc44 100644
--- a/fxjs/xfa/cjx_field.cpp
+++ b/fxjs/xfa/cjx_field.cpp
@@ -57,7 +57,7 @@
   WideString eventString = runtime->ToWideString(params[0]);
   int32_t iRet =
       execSingleEventByName(eventString.AsStringView(), XFA_Element::Field);
-  if (eventString != L"validate")
+  if (!eventString.EqualsASCII("validate"))
     return CJS_Result::Success();
 
   return CJS_Result::Success(runtime->NewBoolean(iRet != XFA_EVENTERROR_Error));
diff --git a/fxjs/xfa/cjx_layoutpseudomodel.cpp b/fxjs/xfa/cjx_layoutpseudomodel.cpp
index 3c6f1e3..2bd6c67 100644
--- a/fxjs/xfa/cjx_layoutpseudomodel.cpp
+++ b/fxjs/xfa/cjx_layoutpseudomodel.cpp
@@ -227,12 +227,12 @@
     return std::vector<CXFA_Node*>();
 
   std::vector<CXFA_Node*> retArray;
-  if (wsType == L"pageArea") {
+  if (wsType.EqualsASCII("pageArea")) {
     if (pLayoutPage->GetFormNode())
       retArray.push_back(pLayoutPage->GetFormNode());
     return retArray;
   }
-  if (wsType == L"contentArea") {
+  if (wsType.EqualsASCII("contentArea")) {
     for (CXFA_LayoutItem* pItem = pLayoutPage->m_pFirstChild; pItem;
          pItem = pItem->m_pNextSibling) {
       if (pItem->GetFormNode()->GetElementType() == XFA_Element::ContentArea)
@@ -296,13 +296,13 @@
   }
 
   XFA_Element eType = XFA_Element::Unknown;
-  if (wsType == L"field")
+  if (wsType.EqualsASCII("field"))
     eType = XFA_Element::Field;
-  else if (wsType == L"draw")
+  else if (wsType.EqualsASCII("draw"))
     eType = XFA_Element::Draw;
-  else if (wsType == L"subform")
+  else if (wsType.EqualsASCII("subform"))
     eType = XFA_Element::Subform;
-  else if (wsType == L"area")
+  else if (wsType.EqualsASCII("area"))
     eType = XFA_Element::Area;
 
   if (eType != XFA_Element::Unknown) {
diff --git a/fxjs/xfa/cjx_node.cpp b/fxjs/xfa/cjx_node.cpp
index d26b9b1..a37d5e4 100644
--- a/fxjs/xfa/cjx_node.cpp
+++ b/fxjs/xfa/cjx_node.cpp
@@ -335,8 +335,10 @@
   if (params.size() > 1)
     return CJS_Result::Failure(JSMessage::kParamError);
 
-  if (params.size() == 1 && runtime->ToWideString(params[0]) != L"pretty")
+  if (params.size() == 1 &&
+      !runtime->ToWideString(params[0]).EqualsASCII("pretty")) {
     return CJS_Result::Failure(JSMessage::kValueError);
+  }
 
   // TODO(weili): Check whether we need to save pretty print XML, pdfium:501.
 
diff --git a/fxjs/xfa/cjx_object.cpp b/fxjs/xfa/cjx_object.cpp
index 98e6866..bfa3925 100644
--- a/fxjs/xfa/cjx_object.cpp
+++ b/fxjs/xfa/cjx_object.cpp
@@ -669,7 +669,7 @@
             TryAttribute(XFA_Attribute::ContentType, false);
         if (ret)
           wsContentType = *ret;
-        if (wsContentType == L"text/html") {
+        if (wsContentType.EqualsASCII("text/html")) {
           wsContentType = L"";
           SetAttribute(XFA_Attribute::ContentType, wsContentType.AsStringView(),
                        false);
@@ -680,7 +680,7 @@
       if (!pContentRawDataNode) {
         pContentRawDataNode =
             ToNode(GetXFAObject())
-                ->CreateSamePacketNode((wsContentType == L"text/xml")
+                ->CreateSamePacketNode(wsContentType.EqualsASCII("text/xml")
                                            ? XFA_Element::Sharpxml
                                            : XFA_Element::Sharptext);
         ToNode(GetXFAObject())->InsertChild(pContentRawDataNode, nullptr);
@@ -766,10 +766,10 @@
         if (ToNode(GetXFAObject())->GetElementType() == XFA_Element::ExData) {
           Optional<WideString> contentType =
               TryAttribute(XFA_Attribute::ContentType, false);
-          if (contentType) {
-            if (*contentType == L"text/html")
+          if (contentType.has_value()) {
+            if (contentType.value().EqualsASCII("text/html"))
               element = XFA_Element::SharpxHTML;
-            else if (*contentType == L"text/xml")
+            else if (contentType.value().EqualsASCII("text/xml"))
               element = XFA_Element::Sharpxml;
           }
         }
diff --git a/xfa/fgas/crt/cfgas_formatstring.cpp b/xfa/fgas/crt/cfgas_formatstring.cpp
index eeef004..622b5d6 100644
--- a/xfa/fgas/crt/cfgas_formatstring.cpp
+++ b/xfa/fgas/crt/cfgas_formatstring.cpp
@@ -262,20 +262,21 @@
     while (ccf < lenf && strf[ccf] == symbol[0])
       symbol += strf[ccf++];
 
-    if (symbol == L"D" || symbol == L"DD") {
+    if (symbol.EqualsASCII("D") || symbol.EqualsASCII("DD")) {
       day = 0;
       if (!ExtractCountDigitsWithOptional(str, len, 1, cc, &day))
         return false;
-    } else if (symbol == L"J") {
+    } else if (symbol.EqualsASCII("J")) {
       uint32_t val = 0;
       ExtractCountDigits(str, len, 3, cc, &val);
-    } else if (symbol == L"M" || symbol == L"MM") {
+    } else if (symbol.EqualsASCII("M") || symbol.EqualsASCII("MM")) {
       month = 0;
       if (!ExtractCountDigitsWithOptional(str, len, 1, cc, &month))
         return false;
-    } else if (symbol == L"MMM" || symbol == L"MMMM") {
+    } else if (symbol.EqualsASCII("MMM") || symbol.EqualsASCII("MMMM")) {
       for (uint16_t i = 0; i < 12; i++) {
-        WideString wsMonthName = pLocale->GetMonthName(i, symbol == L"MMM");
+        WideString wsMonthName =
+            pLocale->GetMonthName(i, symbol.EqualsASCII("MMM"));
         if (wsMonthName.IsEmpty())
           continue;
         if (!wcsncmp(wsMonthName.c_str(), str + *cc, wsMonthName.GetLength())) {
@@ -284,9 +285,10 @@
           break;
         }
       }
-    } else if (symbol == L"EEE" || symbol == L"EEEE") {
+    } else if (symbol.EqualsASCII("EEE") || symbol.EqualsASCII("EEEE")) {
       for (uint16_t i = 0; i < 7; i++) {
-        WideString wsDayName = pLocale->GetDayName(i, symbol == L"EEE");
+        WideString wsDayName =
+            pLocale->GetDayName(i, symbol.EqualsASCII("EEE"));
         if (wsDayName.IsEmpty())
           continue;
         if (!wcsncmp(wsDayName.c_str(), str + *cc, wsDayName.GetLength())) {
@@ -294,23 +296,23 @@
           break;
         }
       }
-    } else if (symbol == L"YY" || symbol == L"YYYY") {
+    } else if (symbol.EqualsASCII("YY") || symbol.EqualsASCII("YYYY")) {
       if (*cc + pdfium::base::checked_cast<int32_t>(symbol.GetLength()) > len)
         return false;
 
       year = 0;
       if (!ExtractCountDigits(str, len, symbol.GetLength(), cc, &year))
         return false;
-      if (symbol == L"YY") {
+      if (symbol.EqualsASCII("YY")) {
         if (year <= 29)
           year += 2000;
         else
           year += 1900;
       }
-    } else if (symbol == L"G") {
+    } else if (symbol.EqualsASCII("G")) {
       *cc += 2;
-    } else if (symbol == L"JJJ" || symbol == L"E" || symbol == L"e" ||
-               symbol == L"w" || symbol == L"WW") {
+    } else if (symbol.EqualsASCII("JJJ") || symbol.EqualsASCIINoCase("E") ||
+               symbol.EqualsASCII("w") || symbol.EqualsASCII("WW")) {
       *cc += symbol.GetLength();
     }
   }
@@ -383,40 +385,40 @@
     while (ccf < lenf && strf[ccf] == symbol[0])
       symbol += strf[ccf++];
 
-    if (symbol == L"k" || symbol == L"K" || symbol == L"h" || symbol == L"H") {
+    if (symbol.EqualsASCIINoCase("k") || symbol.EqualsASCIINoCase("h")) {
       hour = 0;
       if (!ExtractCountDigitsWithOptional(str, len, 1, cc, &hour))
         return false;
-      if (symbol == L"K" && hour == 24)
+      if (symbol.EqualsASCII("K") && hour == 24)
         hour = 0;
-    } else if (symbol == L"kk" || symbol == L"KK" || symbol == L"hh" ||
-               symbol == L"HH") {
+    } else if (symbol.EqualsASCIINoCase("kk") ||
+               symbol.EqualsASCIINoCase("hh")) {
       hour = 0;
       if (!ExtractCountDigits(str, len, 2, cc, &hour))
         return false;
-      if (symbol == L"KK" && hour == 24)
+      if (symbol.EqualsASCII("KK") && hour == 24)
         hour = 0;
-    } else if (symbol == L"M") {
+    } else if (symbol.EqualsASCII("M")) {
       minute = 0;
       if (!ExtractCountDigitsWithOptional(str, len, 1, cc, &minute))
         return false;
-    } else if (symbol == L"MM") {
+    } else if (symbol.EqualsASCII("MM")) {
       minute = 0;
       if (!ExtractCountDigits(str, len, 2, cc, &minute))
         return false;
-    } else if (symbol == L"S") {
+    } else if (symbol.EqualsASCII("S")) {
       second = 0;
       if (!ExtractCountDigitsWithOptional(str, len, 1, cc, &second))
         return false;
-    } else if (symbol == L"SS") {
+    } else if (symbol.EqualsASCII("SS")) {
       second = 0;
       if (!ExtractCountDigits(str, len, 2, cc, &second))
         return false;
-    } else if (symbol == L"FFF") {
+    } else if (symbol.EqualsASCII("FFF")) {
       millisecond = 0;
       if (!ExtractCountDigits(str, len, 3, cc, &millisecond))
         return false;
-    } else if (symbol == L"A") {
+    } else if (symbol.EqualsASCII("A")) {
       WideString wsAM = pLocale->GetMeridiemName(true);
       WideString wsPM = pLocale->GetMeridiemName(false);
       if ((*cc + pdfium::base::checked_cast<int32_t>(wsAM.GetLength()) <=
@@ -431,14 +433,14 @@
         bHasA = true;
         bPM = true;
       }
-    } else if (symbol == L"Z") {
+    } else if (symbol.EqualsASCII("Z")) {
       if (*cc + 3 > len)
         continue;
 
       WideString tz(str[(*cc)++]);
       tz += str[(*cc)++];
       tz += str[(*cc)++];
-      if (tz == L"GMT") {
+      if (tz.EqualsASCII("GMT")) {
         FX_TIMEZONE tzDiff;
         tzDiff.tzHour = 0;
         tzDiff.tzMinute = 0;
@@ -458,7 +460,7 @@
           break;
         }
       }
-    } else if (symbol == L"z") {
+    } else if (symbol.EqualsASCII("z")) {
       if (str[*cc] != 'Z') {
         FX_TIMEZONE tzDiff;
         *cc += ParseTimeZone(str + *cc, len - *cc, &tzDiff);
@@ -588,34 +590,35 @@
     while (ccf < lenf && strf[ccf] == symbol[0])
       symbol += strf[ccf++];
 
-    if (symbol == L"D" || symbol == L"DD") {
+    if (symbol.EqualsASCII("D") || symbol.EqualsASCII("DD")) {
       wsResult += NumToString(symbol.GetLength(), day);
-    } else if (symbol == L"J" || symbol == L"JJJ") {
+    } else if (symbol.EqualsASCII("J") || symbol.EqualsASCII("JJJ")) {
       uint16_t nDays = 0;
       for (int i = 1; i < month; i++)
         nDays += GetSolarMonthDays(year, i);
       nDays += day;
       wsResult += NumToString(symbol.GetLength(), nDays);
-    } else if (symbol == L"M" || symbol == L"MM") {
+    } else if (symbol.EqualsASCII("M") || symbol.EqualsASCII("MM")) {
       wsResult += NumToString(symbol.GetLength(), month);
-    } else if (symbol == L"MMM" || symbol == L"MMMM") {
-      wsResult += pLocale->GetMonthName(month - 1, symbol == L"MMM");
-    } else if (symbol == L"E" || symbol == L"e") {
+    } else if (symbol.EqualsASCII("MMM") || symbol.EqualsASCII("MMMM")) {
+      wsResult += pLocale->GetMonthName(month - 1, symbol.EqualsASCII("MMM"));
+    } else if (symbol.EqualsASCIINoCase("e")) {
       uint16_t wWeekDay = GetWeekDay(year, month, day);
-      wsResult += NumToString(
-          1, symbol == L"E" ? wWeekDay + 1 : (wWeekDay ? wWeekDay : 7));
-    } else if (symbol == L"EEE" || symbol == L"EEEE") {
       wsResult +=
-          pLocale->GetDayName(GetWeekDay(year, month, day), symbol == L"EEE");
-    } else if (symbol == L"G") {
+          NumToString(1, symbol.EqualsASCII("E") ? wWeekDay + 1
+                                                 : (wWeekDay ? wWeekDay : 7));
+    } else if (symbol.EqualsASCII("EEE") || symbol.EqualsASCII("EEEE")) {
+      wsResult += pLocale->GetDayName(GetWeekDay(year, month, day),
+                                      symbol.EqualsASCII("EEE"));
+    } else if (symbol.EqualsASCII("G")) {
       wsResult += pLocale->GetEraName(year > 0);
-    } else if (symbol == L"YY") {
+    } else if (symbol.EqualsASCII("YY")) {
       wsResult += NumToString(2, year % 100);
-    } else if (symbol == L"YYYY") {
+    } else if (symbol.EqualsASCII("YYYY")) {
       wsResult += NumToString(1, year);
-    } else if (symbol == L"w") {
+    } else if (symbol.EqualsASCII("w")) {
       wsResult += NumToString(1, GetWeekOfMonth(year, month, day));
-    } else if (symbol == L"WW") {
+    } else if (symbol.EqualsASCII("WW")) {
       wsResult += NumToString(2, GetWeekOfYear(year, month, day));
     }
   }
@@ -658,30 +661,29 @@
     while (ccf < lenf && strf[ccf] == symbol[0])
       symbol += strf[ccf++];
 
-    if (symbol == L"h" || symbol == L"hh") {
+    if (symbol.EqualsASCII("h") || symbol.EqualsASCII("hh")) {
       if (wHour > 12)
         wHour -= 12;
       wsResult += NumToString(symbol.GetLength(), wHour == 0 ? 12 : wHour);
-    } else if (symbol == L"K" || symbol == L"KK") {
+    } else if (symbol.EqualsASCII("K") || symbol.EqualsASCII("KK")) {
       wsResult += NumToString(symbol.GetLength(), wHour == 0 ? 24 : wHour);
-    } else if (symbol == L"k" || symbol == L"kk") {
+    } else if (symbol.EqualsASCII("k") || symbol.EqualsASCII("kk")) {
       if (wHour > 12)
         wHour -= 12;
       wsResult += NumToString(symbol.GetLength(), wHour);
-    } else if (symbol == L"H" || symbol == L"HH") {
+    } else if (symbol.EqualsASCII("H") || symbol.EqualsASCII("HH")) {
       wsResult += NumToString(symbol.GetLength(), wHour);
-    } else if (symbol == L"M" || symbol == L"MM") {
+    } else if (symbol.EqualsASCII("M") || symbol.EqualsASCII("MM")) {
       wsResult += NumToString(symbol.GetLength(), minute);
-    } else if (symbol == L"S" || symbol == L"SS") {
+    } else if (symbol.EqualsASCII("S") || symbol.EqualsASCII("SS")) {
       wsResult += NumToString(symbol.GetLength(), second);
-    } else if (symbol == L"FFF") {
+    } else if (symbol.EqualsASCII("FFF")) {
       wsResult += NumToString(3, millisecond);
-    } else if (symbol == L"A") {
+    } else if (symbol.EqualsASCII("A")) {
       wsResult += pLocale->GetMeridiemName(!bPM);
-    } else if (symbol == L"Z" || symbol == L"z") {
-      if (symbol == L"Z")
+    } else if (symbol.EqualsASCIINoCase("z")) {
+      if (symbol.EqualsASCII("Z"))
         wsResult += L"GMT";
-
       FX_TIMEZONE tz = pLocale->GetTimeZone();
       if (tz.tzHour != 0 || tz.tzMinute != 0) {
         wsResult += tz.tzHour < 0 ? L"-" : L"+";
@@ -989,7 +991,7 @@
         wsCategory += pStr[ccf];
         ccf++;
       }
-      if (wsCategory != L"num") {
+      if (!wsCategory.EqualsASCII("num")) {
         bBrackOpen = true;
         ccf = 0;
         continue;
@@ -1578,15 +1580,15 @@
         wsCategory += pStr[ccf];
         ccf++;
       }
-      if (!(iFindCategory & 1) && wsCategory == L"date") {
+      if (!(iFindCategory & 1) && wsCategory.EqualsASCII("date")) {
         iFindCategory |= 1;
         eCategory = FX_LOCALECATEGORY_Date;
         if (iFindCategory & 2)
           iFindCategory = 4;
-      } else if (!(iFindCategory & 2) && wsCategory == L"time") {
+      } else if (!(iFindCategory & 2) && wsCategory.EqualsASCII("time")) {
         iFindCategory |= 2;
         eCategory = FX_LOCALECATEGORY_Time;
-      } else if (wsCategory == L"datetime") {
+      } else if (wsCategory.EqualsASCII("datetime")) {
         iFindCategory = 3;
         eCategory = FX_LOCALECATEGORY_DateTime;
       } else {
diff --git a/xfa/fxfa/cxfa_ffdoc.cpp b/xfa/fxfa/cxfa_ffdoc.cpp
index 07e0b1b..12c6cc1 100644
--- a/xfa/fxfa/cxfa_ffdoc.cpp
+++ b/xfa/fxfa/cxfa_ffdoc.cpp
@@ -159,7 +159,7 @@
     return true;
 
   WideString wsType = pDynamicRender->JSObject()->GetContent(false);
-  if (wsType == L"required")
+  if (wsType.EqualsASCII("required"))
     m_FormType = FormType::kXFAFull;
 
   return true;
diff --git a/xfa/fxfa/cxfa_ffdocview.cpp b/xfa/fxfa/cxfa_ffdocview.cpp
index d90abef2..f019959 100644
--- a/xfa/fxfa/cxfa_ffdocview.cpp
+++ b/xfa/fxfa/cxfa_ffdocview.cpp
@@ -617,8 +617,10 @@
     WideString wsValueRef = item->GetValueRef();
     WideString wsLabelRef = item->GetLabelRef();
     const bool bUseValue = wsLabelRef.IsEmpty() || wsLabelRef == wsValueRef;
-    const bool bLabelUseContent = wsLabelRef.IsEmpty() || wsLabelRef == L"$";
-    const bool bValueUseContent = wsValueRef.IsEmpty() || wsValueRef == L"$";
+    const bool bLabelUseContent =
+        wsLabelRef.IsEmpty() || wsLabelRef.EqualsASCII("$");
+    const bool bValueUseContent =
+        wsValueRef.IsEmpty() || wsValueRef.EqualsASCII("$");
     WideString wsValue;
     WideString wsLabel;
     uint32_t uValueHash = FX_HashCode_GetW(wsValueRef.AsStringView(), false);
diff --git a/xfa/fxfa/cxfa_textlayout.cpp b/xfa/fxfa/cxfa_textlayout.cpp
index 44a7c64..4c521ea 100644
--- a/xfa/fxfa/cxfa_textlayout.cpp
+++ b/xfa/fxfa/cxfa_textlayout.cpp
@@ -103,10 +103,9 @@
     if (!pXMLElement)
       continue;
     WideString wsTag = pXMLElement->GetLocalTagName();
-    if (wsTag == L"body" || wsTag == L"html")
+    if (wsTag.EqualsASCII("body") || wsTag.EqualsASCII("html"))
       return pXMLChild;
   }
-
   return nullptr;
 }
 
@@ -737,7 +736,7 @@
         pElement = static_cast<const CFX_XMLElement*>(pXMLNode);
         wsName = pElement->GetLocalTagName();
       }
-      if (wsName == L"ol") {
+      if (wsName.EqualsASCII("ol")) {
         bIsOl = true;
         bCurOl = true;
       }
@@ -755,8 +754,9 @@
         if ((eDisplay == CFX_CSSDisplay::Block ||
              eDisplay == CFX_CSSDisplay::ListItem) &&
             pStyle &&
-            (wsName.IsEmpty() || (wsName != L"body" && wsName != L"html" &&
-                                  wsName != L"ol" && wsName != L"ul"))) {
+            (wsName.IsEmpty() ||
+             !(wsName.EqualsASCII("body") || wsName.EqualsASCII("html") ||
+               wsName.EqualsASCII("ol") || wsName.EqualsASCII("ul")))) {
           const CFX_CSSRect* pRect = pStyle->GetMarginWidth();
           if (pRect) {
             *pLinePos += pRect->top.GetValue();
@@ -764,7 +764,7 @@
           }
         }
 
-        if (wsName == L"a") {
+        if (wsName.EqualsASCII("a")) {
           ASSERT(pElement);
           WideString wsLinkContent = pElement->GetAttribute(L"href");
           if (!wsLinkContent.IsEmpty()) {
@@ -780,9 +780,9 @@
         WideString wsText;
         if (bContentNode && iTabCount == 0) {
           wsText = ToXMLText(pXMLNode)->GetText();
-        } else if (wsName == L"br") {
+        } else if (wsName.EqualsASCII("br")) {
           wsText = L'\n';
-        } else if (wsName == L"li") {
+        } else if (wsName.EqualsASCII("li")) {
           bCurLi = true;
           if (bIsOl)
             wsText = WideString::Format(L"%d.  ", iLiCount);
diff --git a/xfa/fxfa/cxfa_textparser.cpp b/xfa/fxfa/cxfa_textparser.cpp
index 24276e1..f889686 100644
--- a/xfa/fxfa/cxfa_textparser.cpp
+++ b/xfa/fxfa/cxfa_textparser.cpp
@@ -237,8 +237,8 @@
     return;
 
   RetainPtr<CFX_CSSComputedStyle> pNewStyle;
-  if ((tagProvider->GetTagName() != L"body") ||
-      (tagProvider->GetTagName() != L"html")) {
+  if (!(tagProvider->GetTagName().EqualsASCII("body") &&
+        tagProvider->GetTagName().EqualsASCII("html"))) {
     auto pTextContext = pdfium::MakeUnique<CXFA_TextParseContext>();
     CFX_CSSDisplay eDisplay = CFX_CSSDisplay::Inline;
     if (!tagProvider->m_bContent) {
@@ -330,11 +330,8 @@
 
 bool CXFA_TextParser::IsSpaceRun(CFX_CSSComputedStyle* pStyle) const {
   WideString wsValue;
-  if (pStyle && pStyle->GetCustomStyle(L"xfa-spacerun", &wsValue)) {
-    wsValue.MakeLower();
-    return wsValue == L"yes";
-  }
-  return false;
+  return pStyle && pStyle->GetCustomStyle(L"xfa-spacerun", &wsValue) &&
+         wsValue.EqualsASCIINoCase("yes");
 }
 
 RetainPtr<CFGAS_GEFont> CXFA_TextParser::GetFont(
@@ -438,7 +435,7 @@
 
   WideString wsValue;
   if (pStyle->GetCustomStyle(L"underlinePeriod", &wsValue)) {
-    if (wsValue == L"word")
+    if (wsValue.EqualsASCII("word"))
       iPeriod = XFA_AttributeEnum::Word;
   } else if (font) {
     iPeriod = font->GetUnderlinePeriod();
@@ -528,12 +525,12 @@
 
   WideString ws =
       GetLowerCaseElementAttributeOrDefault(pElement, L"xfa:embedType", L"som");
-  if (ws != L"uri")
+  if (!ws.EqualsASCII("uri"))
     return {};
 
   ws = GetLowerCaseElementAttributeOrDefault(pElement, L"xfa:embedMode",
                                              L"formatted");
-  if (ws != L"raw" && ws != L"formatted")
+  if (!(ws.EqualsASCII("raw") || ws.EqualsASCII("formatted")))
     return {};
 
   return pTextProvider->GetEmbeddedObj(wsAttr);
diff --git a/xfa/fxfa/cxfa_textprovider.cpp b/xfa/fxfa/cxfa_textprovider.cpp
index add251c..943d9c4 100644
--- a/xfa/fxfa/cxfa_textprovider.cpp
+++ b/xfa/fxfa/cxfa_textprovider.cpp
@@ -50,8 +50,10 @@
     if (pChildNode && pChildNode->GetElementType() == XFA_Element::ExData) {
       Optional<WideString> contentType = pChildNode->JSObject()->TryAttribute(
           XFA_Attribute::ContentType, false);
-      if (contentType && *contentType == L"text/html")
+      if (contentType.has_value() &&
+          contentType.value().EqualsASCII("text/html")) {
         bRichText = true;
+      }
     }
     return pChildNode;
   }
@@ -85,8 +87,10 @@
     if (pChildNode && pChildNode->GetElementType() == XFA_Element::ExData) {
       Optional<WideString> contentType = pChildNode->JSObject()->TryAttribute(
           XFA_Attribute::ContentType, false);
-      if (contentType && *contentType == L"text/html")
+      if (contentType.has_value() &&
+          contentType.value().EqualsASCII("text/html")) {
         bRichText = true;
+      }
     }
     return pChildNode;
   }
@@ -99,9 +103,11 @@
   CXFA_Node* pNode = pItemNode->GetFirstChild();
   while (pNode) {
     WideString wsName = pNode->JSObject()->GetCData(XFA_Attribute::Name);
-    if (m_eType == XFA_TEXTPROVIDERTYPE_Rollover && wsName == L"rollover")
+    if (m_eType == XFA_TEXTPROVIDERTYPE_Rollover &&
+        wsName.EqualsASCII("rollover")) {
       return pNode;
-    if (m_eType == XFA_TEXTPROVIDERTYPE_Down && wsName == L"down")
+    }
+    if (m_eType == XFA_TEXTPROVIDERTYPE_Down && wsName.EqualsASCII("down"))
       return pNode;
 
     pNode = pNode->GetNextSibling();
diff --git a/xfa/fxfa/parser/cxfa_document.cpp b/xfa/fxfa/parser/cxfa_document.cpp
index 24a03ed..f041a92 100644
--- a/xfa/fxfa/parser/cxfa_document.cpp
+++ b/xfa/fxfa/parser/cxfa_document.cpp
@@ -108,10 +108,10 @@
           Optional<WideString> contentType =
               pChildNode->JSObject()->TryAttribute(XFA_Attribute::ContentType,
                                                    false);
-          if (contentType) {
-            if (*contentType == L"text/html")
+          if (contentType.has_value()) {
+            if (contentType.value().EqualsASCII("text/html"))
               element = XFA_Element::SharpxHTML;
-            else if (*contentType == L"text/xml")
+            else if (contentType.value().EqualsASCII("text/xml"))
               element = XFA_Element::Sharpxml;
           }
         }
@@ -349,7 +349,7 @@
                                bool bForceBind,
                                bool bUpLevel) {
   uint32_t dFlags = XFA_RESOLVENODE_Children | XFA_RESOLVENODE_BindNew;
-  if (bUpLevel || wsRef != L"name")
+  if (bUpLevel || !wsRef.EqualsASCII("name"))
     dFlags |= (XFA_RESOLVENODE_Parent | XFA_RESOLVENODE_Siblings);
 
   XFA_RESOLVENODE_RS rs;
@@ -753,8 +753,10 @@
         continue;
 
       Optional<WideString> ns = pDDGroupNode->JSObject()->TryNamespace();
-      if (!ns || *ns != L"http://ns.adobe.com/data-description/")
+      if (!ns.has_value() ||
+          !ns.value().EqualsASCII("http://ns.adobe.com/data-description/")) {
         continue;
+      }
     }
 
     CXFA_Node* pDDNode =
@@ -1254,8 +1256,10 @@
           continue;
 
         Optional<WideString> ns = pDDGroupNode->JSObject()->TryNamespace();
-        if (!ns || *ns != L"http://ns.adobe.com/data-description/")
+        if (!ns.has_value() ||
+            !ns.value().EqualsASCII("http://ns.adobe.com/data-description/")) {
           continue;
+        }
       }
 
       CXFA_Node* pDDNode = pDDGroupNode->GetFirstChildByName(dwNameHash);
@@ -1410,7 +1414,7 @@
     m_dwDocFlags |= XFA_DOCFLAG_HasInteractive;
 
     WideString wsInteractive = pFormFiller->JSObject()->GetContent(false);
-    if (wsInteractive == L"1") {
+    if (wsInteractive.EqualsASCII("1")) {
       m_dwDocFlags |= XFA_DOCFLAG_Interactive;
       return true;
     }
@@ -1547,7 +1551,6 @@
           wsSOM = WideStringView(wsUseVal.c_str(), wsUseVal.GetLength());
       }
     }
-
     if (!wsURI.IsEmpty() && wsURI != L".")
       continue;
 
@@ -1656,10 +1659,12 @@
     if (!pDDRoot && pChildNode->GetNameHash() == XFA_HASHCODE_DataDescription) {
       Optional<WideString> namespaceURI =
           pChildNode->JSObject()->TryNamespace();
-      if (!namespaceURI)
+      if (!namespaceURI.has_value())
         continue;
-      if (*namespaceURI == L"http://ns.adobe.com/data-description/")
+      if (namespaceURI.value().EqualsASCII(
+              "http://ns.adobe.com/data-description/")) {
         pDDRoot = pChildNode;
+      }
     } else if (!pDataRoot && pChildNode->GetNameHash() == XFA_HASHCODE_Data) {
       Optional<WideString> namespaceURI =
           pChildNode->JSObject()->TryNamespace();
diff --git a/xfa/fxfa/parser/cxfa_document_parser.cpp b/xfa/fxfa/parser/cxfa_document_parser.cpp
index 643695f..57a6e90 100644
--- a/xfa/fxfa/parser/cxfa_document_parser.cpp
+++ b/xfa/fxfa/parser/cxfa_document_parser.cpp
@@ -155,8 +155,8 @@
     wsNSPrefix = wsAttrName.Left(wsAttrName.GetLength() -
                                  wsLocalAttrName.GetLength() - 1);
   }
-  if (wsLocalAttrName == L"xmlns" || wsNSPrefix == L"xmlns" ||
-      wsNSPrefix == L"xml") {
+  if (wsLocalAttrName.EqualsASCII("xmlns") || wsNSPrefix.EqualsASCII("xmlns") ||
+      wsNSPrefix.EqualsASCII("xml")) {
     return false;
   }
   if (!XFA_FDEExtension_ResolveNamespaceQualifier(pElement, wsNSPrefix,
@@ -307,8 +307,8 @@
 }  // namespace
 
 bool XFA_RecognizeRichText(CFX_XMLElement* pRichTextXMLNode) {
-  return pRichTextXMLNode &&
-         pRichTextXMLNode->GetNamespaceURI() == L"http://www.w3.org/1999/xhtml";
+  return pRichTextXMLNode && pRichTextXMLNode->GetNamespaceURI().EqualsASCII(
+                                 "http://www.w3.org/1999/xhtml");
 }
 
 CXFA_DocumentParser::CXFA_DocumentParser(CXFA_Document* pFactory)
@@ -448,12 +448,13 @@
   pXFARootNode->JSObject()->SetCData(XFA_Attribute::Name, L"xfa", false, false);
 
   for (auto it : ToXMLElement(pXMLDocumentNode)->GetAttributes()) {
-    if (it.first == L"uuid")
+    if (it.first.EqualsASCII("uuid")) {
       pXFARootNode->JSObject()->SetCData(XFA_Attribute::Uuid, it.second, false,
                                          false);
-    else if (it.first == L"timeStamp")
+    } else if (it.first.EqualsASCII("timeStamp")) {
       pXFARootNode->JSObject()->SetCData(XFA_Attribute::TimeStamp, it.second,
                                          false, false);
+    }
   }
 
   CFX_XMLNode* pXMLConfigDOMRoot = nullptr;
@@ -796,7 +797,7 @@
         for (auto it : pXMLElement->GetAttributes()) {
           WideString wsAttrName;
           GetAttributeLocalName(it.first.AsStringView(), wsAttrName);
-          if (wsAttrName == L"nil" && it.second == L"true")
+          if (wsAttrName.EqualsASCII("nil") && it.second.EqualsASCII("true"))
             IsNeedValue = false;
 
           XFA_Attribute attr =
@@ -850,9 +851,9 @@
   if (pXFANode->GetElementType() == XFA_Element::ExData) {
     WideString wsContentType =
         pXFANode->JSObject()->GetCData(XFA_Attribute::ContentType);
-    if (wsContentType == L"text/html")
+    if (wsContentType.EqualsASCII("text/html"))
       element = XFA_Element::SharpxHTML;
-    else if (wsContentType == L"text/xml")
+    else if (wsContentType.EqualsASCII("text/xml"))
       element = XFA_Element::Sharpxml;
   }
   if (element == XFA_Element::SharpxHTML)
@@ -907,13 +908,14 @@
     switch (pXMLChild->GetType()) {
       case FX_XMLNODE_Element: {
         CFX_XMLElement* pXMLElement = static_cast<CFX_XMLElement*>(pXMLChild);
-        {
-          WideString wsNamespaceURI = pXMLElement->GetNamespaceURI();
-          if (wsNamespaceURI == L"http://www.xfa.com/schema/xfa-package/" ||
-              wsNamespaceURI == L"http://www.xfa.org/schema/xfa-package/" ||
-              wsNamespaceURI == L"http://www.w3.org/2001/XMLSchema-instance") {
-            continue;
-          }
+        WideString wsNamespaceURI = pXMLElement->GetNamespaceURI();
+        if (wsNamespaceURI.EqualsASCII(
+                "http://www.xfa.com/schema/xfa-package/") ||
+            wsNamespaceURI.EqualsASCII(
+                "http://www.xfa.org/schema/xfa-package/") ||
+            wsNamespaceURI.EqualsASCII(
+                "http://www.w3.org/2001/XMLSchema-instance")) {
+          continue;
         }
 
         XFA_Element eNodeType = XFA_Element::DataModel;
@@ -922,9 +924,9 @@
           if (FindAttributeWithNS(pXMLElement, L"dataNode",
                                   L"http://www.xfa.org/schema/xfa-data/1.0/",
                                   wsDataNodeAttr)) {
-            if (wsDataNodeAttr == L"dataGroup")
+            if (wsDataNodeAttr.EqualsASCII("dataGroup"))
               eNodeType = XFA_Element::DataGroup;
-            else if (wsDataNodeAttr == L"dataValue")
+            else if (wsDataNodeAttr.EqualsASCII("dataValue"))
               eNodeType = XFA_Element::DataValue;
           }
         }
@@ -965,14 +967,14 @@
           if (!ResolveAttribute(pXMLElement, it.first, wsName, wsNS)) {
             continue;
           }
-          if (wsName == L"nil" && it.second == L"true") {
+          if (wsName.EqualsASCII("nil") && it.second.EqualsASCII("true")) {
             bNeedValue = false;
             continue;
           }
-          if (wsNS == L"http://www.xfa.com/schema/xfa-package/" ||
-              wsNS == L"http://www.xfa.org/schema/xfa-package/" ||
-              wsNS == L"http://www.w3.org/2001/XMLSchema-instance" ||
-              wsNS == L"http://www.xfa.org/schema/xfa-data/1.0/") {
+          if (wsNS.EqualsASCII("http://www.xfa.com/schema/xfa-package/") ||
+              wsNS.EqualsASCII("http://www.xfa.org/schema/xfa-package/") ||
+              wsNS.EqualsASCII("http://www.w3.org/2001/XMLSchema-instance") ||
+              wsNS.EqualsASCII("http://www.xfa.org/schema/xfa-data/1.0/")) {
             continue;
           }
           CXFA_Node* pXFAMetaData = m_pFactory->CreateNode(
@@ -1126,20 +1128,18 @@
                                            CFX_XMLInstruction* pXMLInstruction,
                                            XFA_PacketType ePacketID) {
   const std::vector<WideString>& target_data = pXMLInstruction->GetTargetData();
-
   if (pXMLInstruction->IsOriginalXFAVersion()) {
     if (target_data.size() > 1 &&
         (pXFANode->GetDocument()->RecognizeXFAVersionNumber(target_data[0]) !=
          XFA_VERSION_UNKNOWN) &&
-        target_data[1] == L"v2.7-scripting:1") {
+        target_data[1].EqualsASCII("v2.7-scripting:1")) {
       pXFANode->GetDocument()->SetFlag(XFA_DOCFLAG_Scripting, true);
     }
     return;
   }
-
   if (pXMLInstruction->IsAcrobat()) {
-    if (target_data.size() > 1 && target_data[0] == L"JavaScript" &&
-        target_data[1] == L"strictScoping") {
+    if (target_data.size() > 1 && target_data[0].EqualsASCII("JavaScript") &&
+        target_data[1].EqualsASCII("strictScoping")) {
       pXFANode->GetDocument()->SetFlag(XFA_DOCFLAG_StrictScoping, true);
     }
   }
diff --git a/xfa/fxfa/parser/cxfa_layoutpagemgr.cpp b/xfa/fxfa/parser/cxfa_layoutpagemgr.cpp
index a7cbe42..e520684 100644
--- a/xfa/fxfa/parser/cxfa_layoutpagemgr.cpp
+++ b/xfa/fxfa/parser/cxfa_layoutpagemgr.cpp
@@ -81,17 +81,15 @@
   WideString wsRelevant =
       pFormItem->JSObject()->GetCData(XFA_Attribute::Relevant);
   if (!wsRelevant.IsEmpty()) {
-    if (wsRelevant == L"+print" || wsRelevant == L"print")
+    if (wsRelevant.EqualsASCII("+print") || wsRelevant.EqualsASCII("print"))
       dwRelevant &= ~XFA_WidgetStatus_Viewable;
-    else if (wsRelevant == L"-print")
+    else if (wsRelevant.EqualsASCII("-print"))
       dwRelevant &= ~XFA_WidgetStatus_Printable;
   }
-
   if (!(dwParentRelvant & XFA_WidgetStatus_Viewable) &&
       (dwRelevant != XFA_WidgetStatus_Viewable)) {
     dwRelevant &= ~XFA_WidgetStatus_Viewable;
   }
-
   if (!(dwParentRelvant & XFA_WidgetStatus_Printable) &&
       (dwRelevant != XFA_WidgetStatus_Printable)) {
     dwRelevant &= ~XFA_WidgetStatus_Printable;
@@ -188,9 +186,9 @@
         return pNode;
     } else if (bNewExprStyle) {
       WideString wsProcessedTarget = wsExpr;
-      if (wsExpr.Left(4) == L"som(" && wsExpr.Last() == L')') {
+      if (wsExpr.Left(4).EqualsASCII("som(") && wsExpr.Last() == L')')
         wsProcessedTarget = wsExpr.Mid(4, wsExpr.GetLength() - 5);
-      }
+
       XFA_RESOLVENODE_RS rs;
       bool iRet = pDocument->GetScriptContext()->ResolveObjects(
           pPageSetRoot, wsProcessedTarget.AsStringView(), &rs,
diff --git a/xfa/fxfa/parser/cxfa_localevalue.cpp b/xfa/fxfa/parser/cxfa_localevalue.cpp
index 4a5a911..1529a48 100644
--- a/xfa/fxfa/parser/cxfa_localevalue.cpp
+++ b/xfa/fxfa/parser/cxfa_localevalue.cpp
@@ -146,7 +146,7 @@
       case FX_LOCALECATEGORY_Zero:
         bRet = pFormat->ParseZero(wsValue, wsFormat);
         if (!bRet)
-          bRet = wsValue == L"0";
+          bRet = wsValue.EqualsASCII("0");
         break;
       case FX_LOCALECATEGORY_Num: {
         WideString fNum;
@@ -353,7 +353,7 @@
         bRet = pFormat->FormatNull(wsFormat, &wsResult);
       break;
     case FX_LOCALECATEGORY_Zero:
-      if (m_wsValue == L"0")
+      if (m_wsValue.EqualsASCII("0"))
         bRet = pFormat->FormatZero(wsFormat, &wsResult);
       break;
     case FX_LOCALECATEGORY_Num:
diff --git a/xfa/fxfa/parser/cxfa_node.cpp b/xfa/fxfa/parser/cxfa_node.cpp
index 4c3f496..6347677 100644
--- a/xfa/fxfa/parser/cxfa_node.cpp
+++ b/xfa/fxfa/parser/cxfa_node.cpp
@@ -163,28 +163,26 @@
 
 FXCODEC_IMAGE_TYPE XFA_GetImageType(const WideString& wsType) {
   WideString wsContentType(wsType);
-  wsContentType.MakeLower();
-
-  if (wsContentType == L"image/jpg")
+  if (wsContentType.EqualsASCIINoCase("image/jpg"))
     return FXCODEC_IMAGE_JPG;
 
 #ifdef PDF_ENABLE_XFA_BMP
-  if (wsContentType == L"image/bmp")
+  if (wsContentType.EqualsASCIINoCase("image/bmp"))
     return FXCODEC_IMAGE_BMP;
 #endif  // PDF_ENABLE_XFA_BMP
 
 #ifdef PDF_ENABLE_XFA_GIF
-  if (wsContentType == L"image/gif")
+  if (wsContentType.EqualsASCIINoCase("image/gif"))
     return FXCODEC_IMAGE_GIF;
 #endif  // PDF_ENABLE_XFA_GIF
 
 #ifdef PDF_ENABLE_XFA_PNG
-  if (wsContentType == L"image/png")
+  if (wsContentType.EqualsASCIINoCase("image/png"))
     return FXCODEC_IMAGE_PNG;
 #endif  // PDF_ENABLE_XFA_PNG
 
 #ifdef PDF_ENABLE_XFA_TIFF
-  if (wsContentType == L"image/tif")
+  if (wsContentType.EqualsASCII("image/tif"))
     return FXCODEC_IMAGE_TIFF;
 #endif  // PDF_ENABLE_XFA_TIFF
 
@@ -220,7 +218,8 @@
     }
   } else {
     WideString wsURL = wsHref;
-    if (wsURL.Left(7) != L"http://" && wsURL.Left(6) != L"ftp://") {
+    if (!(wsURL.Left(7).EqualsASCII("http://") ||
+          wsURL.Left(6).EqualsASCII("ftp://"))) {
       RetainPtr<CFX_DIBitmap> pBitmap =
           pDoc->GetPDFNamedImage(wsURL.AsStringView(), iImageXDpi, iImageYDpi);
       if (pBitmap) {
@@ -979,9 +978,9 @@
 
 LocaleIface* CXFA_Node::GetLocale() {
   Optional<WideString> localeName = GetLocaleName();
-  if (!localeName)
+  if (!localeName.has_value())
     return nullptr;
-  if (localeName.value() == L"ambient")
+  if (localeName.value().EqualsASCII("ambient"))
     return GetDocument()->GetLocaleMgr()->GetDefLocale();
   return GetDocument()->GetLocaleMgr()->GetLocaleByName(localeName.value());
 }
@@ -3554,8 +3553,11 @@
 
   for (CXFA_Node* pText = pItems->GetFirstChild(); pText;
        pText = pText->GetNextSibling()) {
-    if (pText->JSObject()->GetCData(XFA_Attribute::Name) == L"rollover")
+    if (pText->JSObject()
+            ->GetCData(XFA_Attribute::Name)
+            .EqualsASCII("rollover")) {
       return !pText->JSObject()->GetContent(false).IsEmpty();
+    }
   }
   return false;
 }
@@ -3567,8 +3569,9 @@
 
   for (CXFA_Node* pText = pItems->GetFirstChild(); pText;
        pText = pText->GetNextSibling()) {
-    if (pText->JSObject()->GetCData(XFA_Attribute::Name) == L"down")
+    if (pText->JSObject()->GetCData(XFA_Attribute::Name).EqualsASCII("down")) {
       return !pText->JSObject()->GetContent(false).IsEmpty();
+    }
   }
   return false;
 }
@@ -4328,7 +4331,7 @@
       bSyncData = true;
     }
   } else if (eType == XFA_Element::NumericEdit) {
-    if (wsNewText != L"0")
+    if (!wsNewText.EqualsASCII("0"))
       wsNewText = NumericLimit(wsNewText);
 
     bSyncData = true;
diff --git a/xfa/fxfa/parser/cxfa_xmllocale.cpp b/xfa/fxfa/parser/cxfa_xmllocale.cpp
index 7d3eb77..4658c75 100644
--- a/xfa/fxfa/parser/cxfa_xmllocale.cpp
+++ b/xfa/fxfa/parser/cxfa_xmllocale.cpp
@@ -42,7 +42,7 @@
   for (auto* child = doc->GetRoot()->GetFirstChild(); child;
        child = child->GetNextSibling()) {
     CFX_XMLElement* elem = ToXMLElement(child);
-    if (elem && elem->GetName() == L"locale") {
+    if (elem && elem->GetName().EqualsASCII("locale")) {
       locale = elem;
       break;
     }
@@ -134,7 +134,7 @@
     WideString abbr = elem->GetAttribute(L"abbr");
     bool abbr_value = false;
     if (!abbr.IsEmpty())
-      abbr_value = abbr == L"1";
+      abbr_value = abbr.EqualsASCII("1");
     if (abbr_value != bAbbr)
       continue;
 
diff --git a/xfa/fxfa/parser/xfa_utils.cpp b/xfa/fxfa/parser/xfa_utils.cpp
index c7bdb81..a59d1c2 100644
--- a/xfa/fxfa/parser/xfa_utils.cpp
+++ b/xfa/fxfa/parser/xfa_utils.cpp
@@ -207,7 +207,8 @@
       Optional<WideString> contentType =
           pNode->JSObject()->TryAttribute(XFA_Attribute::ContentType, false);
       if (pRawValueNode->GetElementType() == XFA_Element::SharpxHTML &&
-          (contentType && *contentType == L"text/html")) {
+          contentType.has_value() &&
+          contentType.value().EqualsASCII("text/html")) {
         CFX_XMLNode* pExDataXML = pNode->GetXMLMappingNode();
         if (!pExDataXML)
           break;
@@ -221,7 +222,8 @@
         wsChildren += WideString::FromUTF8(
             ByteStringView(pMemStream->GetBuffer(), pMemStream->GetSize()));
       } else if (pRawValueNode->GetElementType() == XFA_Element::Sharpxml &&
-                 (contentType && *contentType == L"text/xml")) {
+                 contentType.has_value() &&
+                 contentType.value().EqualsASCII("text/xml")) {
         Optional<WideString> rawValue = pRawValueNode->JSObject()->TryAttribute(
             XFA_Attribute::Value, false);
         if (!rawValue || rawValue->IsEmpty())