diff --git a/gc/base/standard/ConcurrentGCIncrementalUpdate.cpp b/gc/base/standard/ConcurrentGCIncrementalUpdate.cpp
index 8644a3d78b..e0f56b8f7f 100644
--- a/gc/base/standard/ConcurrentGCIncrementalUpdate.cpp
+++ b/gc/base/standard/ConcurrentGCIncrementalUpdate.cpp
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2018, 2023 IBM Corp. and others
+ * Copyright (c) 2018, 2021 IBM Corp. and others
  *
  * This program and the accompanying materials are made available under
  * the terms of the Eclipse Public License 2.0 which accompanies this
@@ -790,20 +790,19 @@ MM_ConcurrentGCIncrementalUpdate::updateTuningStatisticsInternal(MM_EnvironmentB
 	if (_extensions->debugConcurrentMark) {
 		OMRPORT_ACCESS_FROM_ENVIRONMENT(env);
 
-		const size_t bufLen = 10;
-		char pass1Factor[bufLen];
-		char pass2Factor[bufLen];
+		char pass1Factor[10];
+		char pass2Factor[10];
 
 		if (_extensions->cardCleaningPasses > 0) {
-			omrstr_printf(pass1Factor, bufLen, "%.3f", _cardCleaningFactorPass1);
+			sprintf(pass1Factor, "%.3f", _cardCleaningFactorPass1);
 		} else {
-			omrstr_printf(pass1Factor, bufLen, "%s", "N/A");
+			sprintf(pass1Factor, "%s", "N/A");
 		}
 
 		if (_extensions->cardCleaningPasses > 1) {
-			omrstr_printf(pass2Factor, bufLen, "%.3f", _cardCleaningFactorPass2);
+			sprintf(pass2Factor, "%.3f", _cardCleaningFactorPass2);
 		} else {
-			omrstr_printf(pass2Factor, bufLen, "%s", "N/A");
+			sprintf(pass2Factor, "%s", "N/A");
 		}
 
 		omrtty_printf("Update tuning statistics: Total Traced=\"%zu\" (Pass 2 KO=\"%zu\")  Total Cleaned=\"%zu\" (Pass 2 KO=\"%zu\")\n",
diff --git a/tools/hookgen/HookGen.cpp b/tools/hookgen/HookGen.cpp
index 729b7e1855..cfff242543 100644
--- a/tools/hookgen/HookGen.cpp
+++ b/tools/hookgen/HookGen.cpp
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015, 2023 IBM Corp. and others
+ * Copyright (c) 2015, 2021 IBM Corp. and others
  *
  * This program and the accompanying materials are made available under
  * the terms of the Eclipse Public License 2.0 which accompanies this
@@ -28,9 +28,6 @@
 #if defined(OMR_OS_WINDOWS)
 #include <windows.h>
 #define strdup _strdup
-#if defined(_MSC_VER) && (_MSC_VER < 1900)
-#define snprintf(s, n, format, ...) _snprintf_s(s, n, _TRUNCATE, format, __VA_ARGS__)
-#endif /* defined(_MSC_VER) && (_MSC_VER < 1900) */
 #endif /* defined(OMR_OS_WINDOWS) */
 
 #include "HookGen.hpp"
@@ -217,7 +214,8 @@ HookGen::writeEventToPublicHeader(const char *name, const char *description, con
 	char *exampleBuf = (char *)malloc(bufSize + 1);
 	if (NULL != exampleBuf) {
 		/* If we fail to allocate room for the example just skip writing it */
-		snprintf(exampleBuf, bufSize + 1, (char *)example, name, description, name, structName);
+		int length = sprintf(exampleBuf, (char *)example, name, description, name, structName);
+		exampleBuf[length] = '\0';
 
 		writeComment(_publicFile, exampleBuf);
 
diff --git a/tools/tracegen/Port.hpp b/tools/tracegen/Port.hpp
index 4d11596e20..1f53f68c5a 100644
--- a/tools/tracegen/Port.hpp
+++ b/tools/tracegen/Port.hpp
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2014, 2023 IBM Corp. and others
+ * Copyright (c) 2014, 2018 IBM Corp. and others
  *
  * This program and the accompanying materials are made available under
  * the terms of the Eclipse Public License 2.0 which accompanies this
@@ -46,9 +46,7 @@
 #if defined(OMR_OS_WINDOWS)
 #define strdup _strdup
 #define stat _stat
-#if defined(_MSC_VER) && (_MSC_VER < 1900)
-#define snprintf(s, n, format, ...) _snprintf_s(s, n, _TRUNCATE, format, __VA_ARGS__)
-#endif /* defined(_MSC_VER) && (_MSC_VER < 1900) */
+#define snprintf _snprintf
 #define PATH_SEP "\\"
 #define dirstat struct _stat
 #define PORT_INVALID_FIND_FILE_HANDLE ((intptr_t) INVALID_HANDLE_VALUE)
diff --git a/tools/tracegen/TraceHeaderWriter.cpp b/tools/tracegen/TraceHeaderWriter.cpp
index 57c05e1795..c0ad864411 100644
--- a/tools/tracegen/TraceHeaderWriter.cpp
+++ b/tools/tracegen/TraceHeaderWriter.cpp
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2014, 2023 IBM Corp. and others
+ * Copyright (c) 2014, 2017 IBM Corp. and others
  *
  * This program and the accompanying materials are made available under
  * the terms of the Eclipse Public License 2.0 which accompanies this
@@ -214,9 +214,8 @@ TraceHeaderWriter::tpTemplate(FILE *fd, unsigned int overhead, unsigned int test
 	char *testNop =  NULL;
 	char *testMacroTemplate = (char *)  "#define TrcEnabled_%s  (%s_UtActive[%u] != 0)\n";
 	char *testNopTemplate = (char *) "#define TrcEnabled_%s  (0)\n";
-	size_t parmBufLen = (parmCount * 5) + 1;
 
-	parmString = (char *)Port::omrmem_calloc(1, parmBufLen);
+	parmString = (char *)Port::omrmem_calloc(1, (parmCount * sizeof(char) * 5) + 1);
 	if (NULL == parmString) {
 		eprintf("Failed to allocate memory");
 		goto failed;
@@ -230,31 +229,27 @@ TraceHeaderWriter::tpTemplate(FILE *fd, unsigned int overhead, unsigned int test
 	pos = parmString;
 
 	if (test) {
-		/* Allow 20 digits for tracepoints + 1 for the null byte. */
-		size_t bufLen = strlen(testMacroTemplate) + strlen(name) + strlen(module) + 21;
-		testMacro = (char *)Port::omrmem_calloc(1, bufLen);
+		/* Allow 7 digits for tracepoints + 1 for the null byte. (Millions of trace points are unlikely.) */
+		testMacro = (char *)Port::omrmem_calloc(1, (strlen(testMacroTemplate) + strlen(name) + strlen(module) + 8));
 		if (NULL == testMacro) {
 			eprintf("Failed to allocate memory");
 			goto failed;
 		}
-		snprintf(testMacro, bufLen, testMacroTemplate, name, module, id);
+		sprintf(testMacro, testMacroTemplate, name, module, id);
 
-		bufLen = strlen(testMacroTemplate) + strlen(name) + 1;
-		testNop = (char *)Port::omrmem_calloc(1, bufLen);
+		testNop = (char *)Port::omrmem_calloc(1, (strlen(testMacroTemplate) + strlen(name) + 1));
 		if (NULL == testNop) {
 			eprintf("Failed to allocate memory");
 			goto failed;
 		}
-		snprintf(testNop, bufLen, testNopTemplate, name);
+		sprintf(testNop, testNopTemplate, name);
 	} else {
 		testMacro = (char *) "";
 		testNop = (char *) "";
 	}
 
 	for (unsigned int i = 0; i < parmCount; i++) {
-		int n = snprintf(pos, parmBufLen, ", P%u", i + 1);
-		pos += n;
-		parmBufLen -= n;
+		pos += sprintf(pos, ", P%u", i + 1);
 	}
 
 	if (auxiliary) {
@@ -349,9 +344,8 @@ TraceHeaderWriter::tpAssert(FILE *fd, unsigned int overhead, unsigned int test,
 	char *testnop = NULL;
 	char *testmacrotemplate = (char *)  "#define TrcEnabled_%s  (%s_UtActive[%u] != 0)\n";
 	char *testnoptemplate = (char *) "#define TrcEnabled_%s  (0)\n";
-	size_t parmBufLen = (parmCount * 5) + 1;
 
-	parmString = (char *)Port::omrmem_calloc(1, parmBufLen);
+	parmString = (char *)Port::omrmem_calloc(1, (parmCount * sizeof(char) * 5) + 1);
 	if (NULL == parmString) {
 		eprintf("Failed to allocate memory");
 		goto failed;
@@ -366,31 +360,27 @@ TraceHeaderWriter::tpAssert(FILE *fd, unsigned int overhead, unsigned int test,
 	pos = parmString;
 
 	if (test) {
-		/* Allow 20 digits for tracepoints + 1 for the null byte. */
-		size_t bufLen = strlen(testmacrotemplate) + strlen(name) + strlen(module) + 21;
-		testmacro = (char *)Port::omrmem_calloc(1, bufLen);
+		/* Allow 7 digits for tracepoints + 1 for the null byte. (Millions of trace points are unlikely.) */
+		testmacro = (char *)Port::omrmem_calloc(1, (strlen(testmacrotemplate) + strlen(name) + strlen(module) + 8));
 		if (NULL == testmacro) {
 			eprintf("Failed to allocate memory");
 			goto failed;
 		}
-		snprintf(testmacro, bufLen, testmacrotemplate, name, module, id);
+		sprintf(testmacro, testmacrotemplate, name, module, id);
 
-		bufLen = strlen(testmacrotemplate) + strlen(name) + 1;
-		testnop = (char *)Port::omrmem_calloc(1, bufLen);
+		testnop = (char *)Port::omrmem_calloc(1, (strlen(testmacrotemplate) + strlen(name) + 1));
 		if (NULL == testnop) {
 			eprintf("Failed to allocate memory");
 			goto failed;
 		}
-		snprintf(testnop, bufLen, testnoptemplate, name);
+		sprintf(testnop, testnoptemplate, name);
 	} else {
 		testmacro = (char *) "";
 		testnop = (char *) "";
 	}
 
 	for (unsigned int i = 0; i < parmCount; i++) {
-		int n = snprintf(pos, parmBufLen, ", P%u", i + 1);
-		pos += n;
-		parmBufLen -= n;
+		pos += sprintf(pos, ", P%u", i + 1);
 	}
 
 	if (0 <= fprintf(fd, TP_ASSERT_TEMPLATE
diff --git a/tools/tracemerge/DATMerge.cpp b/tools/tracemerge/DATMerge.cpp
index 73c95e38d8..3b265346bc 100644
--- a/tools/tracemerge/DATMerge.cpp
+++ b/tools/tracemerge/DATMerge.cpp
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2014, 2023 IBM Corp. and others
+ * Copyright (c) 2014, 2020 IBM Corp. and others
  *
  * This program and the accompanying materials are made available under
  * the terms of the Eclipse Public License 2.0 which accompanies this
@@ -149,9 +149,8 @@ DATMerge::merge(J9TDFOptions *options, const char *fromFileName)
 		if (0 != fclose(toFile)) {
 			perror("fclose error");
 		}
-		size_t bufLen = strlen(toFileName) + strlen(".new") + 1;
-		char *newToFileName = (char *)Port::omrmem_calloc(1, bufLen);
-		snprintf(newToFileName, bufLen, "%s.new", toFileName);
+		char *newToFileName = (char *)Port::omrmem_calloc(1, strlen(toFileName) + strlen(".new") + 1);
+		sprintf(newToFileName, "%s.new", toFileName);
 
 		char *buffer = (char *)Port::omrmem_calloc(1, 1024);