diff --git a/Source/Core/Common/JitRegister.cpp b/Source/Core/Common/JitRegister.cpp
index eb5845d5cb..0dd5557f11 100644
--- a/Source/Core/Common/JitRegister.cpp
+++ b/Source/Core/Common/JitRegister.cpp
@@ -81,15 +81,13 @@ bool IsEnabled()
   return s_is_enabled;
 }
 
-void RegisterV(const void* base_address, u32 code_size, const char* format, va_list args)
+void Register(const void* base_address, u32 code_size, const std::string& symbol_name)
 {
 #if !(defined USE_OPROFILE && USE_OPROFILE) && !defined(USE_VTUNE)
   if (!s_perf_map_file.IsOpen())
     return;
 #endif
 
-  std::string symbol_name = StringFromFormatV(format, args);
-
 #if defined USE_OPROFILE && USE_OPROFILE
   op_write_native_code(s_agent, symbol_name.c_str(), (u64)base_address, base_address, code_size);
 #endif
diff --git a/Source/Core/Common/JitRegister.h b/Source/Core/Common/JitRegister.h
index 084f4486fa..49dfb5ab44 100644
--- a/Source/Core/Common/JitRegister.h
+++ b/Source/Core/Common/JitRegister.h
@@ -2,31 +2,32 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
-#include <stdarg.h>
+
 #include <string>
+
+#include <fmt/format.h>
+
 #include "Common/CommonTypes.h"
 
 namespace JitRegister
 {
 void Init(const std::string& perf_dir);
 void Shutdown();
-void RegisterV(const void* base_address, u32 code_size, const char* format, va_list args);
+void Register(const void* base_address, u32 code_size, const std::string& symbol_name);
 bool IsEnabled();
 
-inline void Register(const void* base_address, u32 code_size, const char* format, ...)
+template <typename... Args>
+inline void Register(const void* base_address, u32 code_size, fmt::format_string<Args...> format,
+                     Args&&... args)
 {
-  va_list args;
-  va_start(args, format);
-  RegisterV(base_address, code_size, format, args);
-  va_end(args);
+  Register(base_address, code_size, fmt::format(format, std::forward<Args>(args)...));
 }
 
-inline void Register(const void* start, const void* end, const char* format, ...)
+template <typename... Args>
+inline void Register(const void* start, const void* end, fmt::format_string<Args...> format,
+                     Args&&... args)
 {
-  va_list args;
-  va_start(args, format);
   u32 code_size = (u32)((const char*)end - (const char*)start);
-  RegisterV(start, code_size, format, args);
-  va_end(args);
+  Register(start, code_size, fmt::format(format, std::forward<Args>(args)...));
 }
 }  // namespace JitRegister
diff --git a/Source/Core/Core/PowerPC/Jit64Common/Jit64AsmCommon.cpp b/Source/Core/Core/PowerPC/Jit64Common/Jit64AsmCommon.cpp
index b6fc24e89b..124218fb7f 100644
--- a/Source/Core/Core/PowerPC/Jit64Common/Jit64AsmCommon.cpp
+++ b/Source/Core/Core/PowerPC/Jit64Common/Jit64AsmCommon.cpp
@@ -369,7 +369,7 @@ const u8* CommonAsmRoutines::GenQuantizedStoreRuntime(bool single, EQuantizeType
   const u8* load = AlignCode4();
   GenQuantizedStore(single, type, -1);
   RET();
-  JitRegister::Register(start, GetCodePtr(), "JIT_QuantizedStore_%i_%i", type, single);
+  JitRegister::Register(start, GetCodePtr(), "JIT_QuantizedStore_{}_{}", type, single);
 
   return load;
 }
@@ -400,7 +400,7 @@ const u8* CommonAsmRoutines::GenQuantizedLoadRuntime(bool single, EQuantizeType
   const u8* load = AlignCode4();
   GenQuantizedLoad(single, type, -1);
   RET();
-  JitRegister::Register(start, GetCodePtr(), "JIT_QuantizedLoad_%i_%i", type, single);
+  JitRegister::Register(start, GetCodePtr(), "JIT_QuantizedLoad_{}_{}", type, single);
 
   return load;
 }
diff --git a/Source/Core/Core/PowerPC/Jit64Common/TrampolineCache.cpp b/Source/Core/Core/PowerPC/Jit64Common/TrampolineCache.cpp
index d30b1eacb9..faf0b7ec9e 100644
--- a/Source/Core/Core/PowerPC/Jit64Common/TrampolineCache.cpp
+++ b/Source/Core/Core/PowerPC/Jit64Common/TrampolineCache.cpp
@@ -48,7 +48,7 @@ const u8* TrampolineCache::GenerateReadTrampoline(const TrampolineInfo& info)
 
   JMP(info.start + info.len, true);
 
-  JitRegister::Register(trampoline, GetCodePtr(), "JIT_ReadTrampoline_%x", info.pc);
+  JitRegister::Register(trampoline, GetCodePtr(), "JIT_ReadTrampoline_{:x}", info.pc);
   return trampoline;
 }
 
@@ -67,6 +67,6 @@ const u8* TrampolineCache::GenerateWriteTrampoline(const TrampolineInfo& info)
 
   JMP(info.start + info.len, true);
 
-  JitRegister::Register(trampoline, GetCodePtr(), "JIT_WriteTrampoline_%x", info.pc);
+  JitRegister::Register(trampoline, GetCodePtr(), "JIT_WriteTrampoline_{:x}", info.pc);
   return trampoline;
 }
diff --git a/Source/Core/Core/PowerPC/JitCommon/JitCache.cpp b/Source/Core/Core/PowerPC/JitCommon/JitCache.cpp
index de55900846..ca090547f9 100644
--- a/Source/Core/Core/PowerPC/JitCommon/JitCache.cpp
+++ b/Source/Core/Core/PowerPC/JitCommon/JitCache.cpp
@@ -131,12 +131,12 @@ void JitBaseBlockCache::FinalizeBlock(JitBlock& block, bool block_link,
   if (JitRegister::IsEnabled() &&
       (symbol = g_symbolDB.GetSymbolFromAddr(block.effectiveAddress)) != nullptr)
   {
-    JitRegister::Register(block.checkedEntry, block.codeSize, "JIT_PPC_%s_%08x",
+    JitRegister::Register(block.checkedEntry, block.codeSize, "JIT_PPC_{}_{:08x}",
                           symbol->function_name.c_str(), block.physicalAddress);
   }
   else
   {
-    JitRegister::Register(block.checkedEntry, block.codeSize, "JIT_PPC_%08x",
+    JitRegister::Register(block.checkedEntry, block.codeSize, "JIT_PPC_{:08x}",
                           block.physicalAddress);
   }
 }
diff --git a/Source/Core/VideoCommon/VertexLoaderX64.cpp b/Source/Core/VideoCommon/VertexLoaderX64.cpp
index 40ae508219..7a4929361d 100644
--- a/Source/Core/VideoCommon/VertexLoaderX64.cpp
+++ b/Source/Core/VideoCommon/VertexLoaderX64.cpp
@@ -50,9 +50,8 @@ VertexLoaderX64::VertexLoaderX64(const TVtxDesc& vtx_desc, const VAT& vtx_att)
   GenerateVertexLoader();
   WriteProtect();
 
-  const std::string name =
-      fmt::format("VertexLoaderX64\nVtx desc: \n{}\nVAT:\n{}", vtx_desc, vtx_att);
-  JitRegister::Register(region, GetCodePtr(), name.c_str());
+  JitRegister::Register(region, GetCodePtr(), "VertexLoaderX64\nVtx desc: \n{}\nVAT:\n{}", vtx_desc,
+                        vtx_att);
 }
 
 OpArg VertexLoaderX64::GetVertexAddr(CPArray array, VertexComponentFormat attribute)