diff --git a/code/ryzom/tools/leveldesign/prim_export/main.cpp b/code/ryzom/tools/leveldesign/prim_export/main.cpp
index 44f377575..b993caea1 100644
--- a/code/ryzom/tools/leveldesign/prim_export/main.cpp
+++ b/code/ryzom/tools/leveldesign/prim_export/main.cpp
@@ -179,7 +179,9 @@ bool getZoneCoordByName(const char * name, uint16& x, uint16& y)
 			return false;
 		}
 	}
-	y = -atoi(ystr.c_str());
+
+	NLMISC::fromString(ystr, y);
+	y = -y;
 
 	// x
 	x = 0;
@@ -223,7 +225,11 @@ sint getYFromZoneName (const string &ZoneName)
 	{
 		xStr += ZoneName[i]; ++i;
 	}
-	return -atoi(yStr.c_str());
+
+	sint y = 0;
+	NLMISC::fromString(yStr, y);
+
+	return -y;
 }
 
 // ***************************************************************************
diff --git a/code/ryzom/tools/pd_parser/parser_rules.h b/code/ryzom/tools/pd_parser/parser_rules.h
index ed3f0fec0..a5840504e 100644
--- a/code/ryzom/tools/pd_parser/parser_rules.h
+++ b/code/ryzom/tools/pd_parser/parser_rules.h
@@ -203,7 +203,7 @@ CParseNode	*parse##nodename(CTokenizer &tokenizer)	\
 	{	\
 		if (tokenizer.end() || tokenizer.current() != TokenNumber)	\
 			PARSE_FAIL	\
-		main->savein = atoi(tokenizer.get(tokenizer.currentToken()).c_str());	\
+		NLMISC::fromString(tokenizer.get(tokenizer.currentToken()), main->savein);	\
 		tokenizer.next();	\
 	}
 
diff --git a/code/ryzom/tools/pd_parser/templatizer.h b/code/ryzom/tools/pd_parser/templatizer.h
index 70a98b5a4..2f661c059 100644
--- a/code/ryzom/tools/pd_parser/templatizer.h
+++ b/code/ryzom/tools/pd_parser/templatizer.h
@@ -865,7 +865,9 @@ public:
 
 		if (env->envExists(subname))
 		{
-			CTemplatizerEnv*	subenv = (atoi(evalinsub.c_str()) ? env->getEnv(subname) : env);
+			sint eval;
+			NLMISC::fromString(evalinsub, eval);
+			CTemplatizerEnv*	subenv = (eval ? env->getEnv(subname) : env);
 			return ITemplatizerBloc::eval(subenv);
 		}
 
diff --git a/code/ryzom/tools/server/build_world_packed_col/zone_util.cpp b/code/ryzom/tools/server/build_world_packed_col/zone_util.cpp
index 64bcf268a..d63e3caf5 100644
--- a/code/ryzom/tools/server/build_world_packed_col/zone_util.cpp
+++ b/code/ryzom/tools/server/build_world_packed_col/zone_util.cpp
@@ -51,7 +51,8 @@ bool getZonePos(const std::string &name, sint &destX, sint &destY)
 	if (xStr.size() != 2) return false;
 	// compute min corner
 	destX = ((xStr[0] - 'A') * 26 + (xStr[1] - 'A'));
-	destY = -atoi(yStr.c_str());
+	NLMISC::fromString(yStr, destY);
+	destY = -destY;
 	return true;
 }
 
diff --git a/code/ryzom/tools/skill_extractor/skill_extractor.cpp b/code/ryzom/tools/skill_extractor/skill_extractor.cpp
index 37b3f1020..24500f45d 100644
--- a/code/ryzom/tools/skill_extractor/skill_extractor.cpp
+++ b/code/ryzom/tools/skill_extractor/skill_extractor.cpp
@@ -317,10 +317,10 @@ sint main( sint argc, char ** argv )
 				skill.ParentSkill = toUpper(string( ptr ));
 				break;
 			case 3: // max skill value
-				skill.MaxValue = (uint16)atoi(ptr);
+				NLMISC::fromString(std::string(ptr), skill.MaxValue);
 				break;
 			case 4: // stage type
-				skill.StageType = (uint8)atoi(ptr);
+				NLMISC::fromString(std::string(ptr), skill.StageType);
 				break;
 			case 5: // main category
 				skill.MainCategory = string( ptr );
diff --git a/code/ryzom/tools/stats_scan/char_commands.cpp b/code/ryzom/tools/stats_scan/char_commands.cpp
index 4506536af..261e1f2e3 100644
--- a/code/ryzom/tools/stats_scan/char_commands.cpp
+++ b/code/ryzom/tools/stats_scan/char_commands.cpp
@@ -196,7 +196,9 @@ NLMISC_COMMAND(jobsPromote,"pause execution of jobs","<jobId>")
 	if (args.size()!=1)
 		return false;
 
-	uint32 idx= atoi(args[0].c_str());
+	uint32 idx;
+	NLMISC::fromString(args[0], idx);
+
 	if ( (idx==0 && args[0]!="0") )
 	{
 		nlwarning("Argument is not a valid job id - should be a number");
@@ -216,7 +218,9 @@ NLMISC_COMMAND(JobUpdatesPerUpdate,"set or display the number of job updates per
 
 	if (args.size()==1)
 	{
-		uint32 count= atoi(args[0].c_str());
+		uint32 count;
+		NLMISC::fromString(args[0], count);
+
 		if ( (count==0 && args[0]!="0") )
 		{
 			nlwarning("Argument is not a valid number");
@@ -270,7 +274,9 @@ NLMISC_COMMAND(jobsDisplayDetails,"display detailed info for the current job (or
 
 	case 1:
 		{
-			uint32 idx= atoi(args[0].c_str());
+			uint32 idx;
+			NLMISC::fromString(args[0], idx);
+
 			if ( (idx==0 && args[0]!="0") )
 			{
 				nlwarning("Argument is not a valid job id - should be a number");
diff --git a/code/ryzom/tools/translation_tools/extract_bot_names.cpp b/code/ryzom/tools/translation_tools/extract_bot_names.cpp
index 0bfc6f6dc..5660b1a41 100644
--- a/code/ryzom/tools/translation_tools/extract_bot_names.cpp
+++ b/code/ryzom/tools/translation_tools/extract_bot_names.cpp
@@ -339,7 +339,8 @@ int extractBotNames(int argc, char *argv[])
 				result[i]->getPropertyByName("count", countStr);
 				result[i]->getPropertyByName("bot_sheet_look", sheetStr);
 
-				uint32 count = atoi(countStr.c_str());
+				uint32 count;
+				NLMISC::fromString(countStr, count);
 
 				if (count != 0)
 				{
@@ -402,7 +403,8 @@ int extractBotNames(int argc, char *argv[])
 				result[i]->getPropertyByName("count", countStr);
 				result[i]->getPropertyByName("bot_sheet_client", sheetStr);
 
-				uint32 count = atoi(countStr.c_str());
+				uint32 count;
+				NLMISC::fromString(countStr, count);
 
 				if (count > 0 && sheetStr.empty())
 				{
diff --git a/code/ryzom/tools/translation_tools/main.cpp b/code/ryzom/tools/translation_tools/main.cpp
index decf4af78..5655442e9 100644
--- a/code/ryzom/tools/translation_tools/main.cpp
+++ b/code/ryzom/tools/translation_tools/main.cpp
@@ -263,14 +263,16 @@ bool parseDiffCommandFromComment(const ucstring &comments, TDiffInfo &diffInfo)
 	string indexStr;
 	if (!CI18N::parseLabel(it, last, indexStr))
 		return false;
-	diffInfo.Index1 = atoi(indexStr.c_str());
+
+	NLMISC::fromString(indexStr, diffInfo.Index1);
 
 	if (diffInfo.Command == diff_swap)
 	{
 		CI18N::skipWhiteSpace(it, last);
 		if (!CI18N::parseLabel(it, last, indexStr))
 			return false;
-		diffInfo.Index2 = atoi(indexStr.c_str());
+
+		NLMISC::fromString(indexStr, diffInfo.Index2);
 	}
 	return true;
 }
@@ -3183,7 +3185,9 @@ int main(int argc, char *argv[])
 			showUsage(argv[0]);
 			return 1;
 		}
-		uint nbLines = atoi(argv[3]);
+
+		uint nbLines;
+		NLMISC::fromString(argv[3], nbLines);
 
 		cropLines(argv[2], nbLines);