diff --git a/src/common/string_util.cpp b/src/common/string_util.cpp
index c556d5040..541a2bf4e 100644
--- a/src/common/string_util.cpp
+++ b/src/common/string_util.cpp
@@ -4,11 +4,10 @@
 
 #include <algorithm>
 #include <cctype>
-#include <cerrno>
 #include <codecvt>
-#include <cstdio>
 #include <cstdlib>
-#include <cstring>
+#include <locale>
+#include <sstream>
 #include "common/common_paths.h"
 #include "common/logging/log.h"
 #include "common/string_util.h"
@@ -33,24 +32,6 @@ std::string ToUpper(std::string str) {
     return str;
 }
 
-// For Debugging. Read out an u8 array.
-std::string ArrayToString(const u8* data, std::size_t size, int line_len, bool spaces) {
-    std::ostringstream oss;
-    oss << std::setfill('0') << std::hex;
-
-    for (int line = 0; size; ++data, --size) {
-        oss << std::setw(2) << (int)*data;
-
-        if (line_len == ++line) {
-            oss << '\n';
-            line = 0;
-        } else if (spaces)
-            oss << ' ';
-    }
-
-    return oss.str();
-}
-
 // Turns "  hej " into "hej". Also handles tabs.
 std::string StripSpaces(const std::string& str) {
     const std::size_t s = str.find_first_not_of(" \t\r\n");
@@ -71,40 +52,6 @@ std::string StripQuotes(const std::string& s) {
         return s;
 }
 
-bool TryParse(const std::string& str, u32* const output) {
-    char* endptr = nullptr;
-
-    // Reset errno to a value other than ERANGE
-    errno = 0;
-
-    unsigned long value = strtoul(str.c_str(), &endptr, 0);
-
-    if (!endptr || *endptr)
-        return false;
-
-    if (errno == ERANGE)
-        return false;
-
-#if ULONG_MAX > UINT_MAX
-    if (value >= 0x100000000ull && value <= 0xFFFFFFFF00000000ull)
-        return false;
-#endif
-
-    *output = static_cast<u32>(value);
-    return true;
-}
-
-bool TryParse(const std::string& str, bool* const output) {
-    if ("1" == str || "true" == ToLower(str))
-        *output = true;
-    else if ("0" == str || "false" == ToLower(str))
-        *output = false;
-    else
-        return false;
-
-    return true;
-}
-
 std::string StringFromBool(bool value) {
     return value ? "True" : "False";
 }
diff --git a/src/common/string_util.h b/src/common/string_util.h
index 091735d5f..d8fa4053e 100644
--- a/src/common/string_util.h
+++ b/src/common/string_util.h
@@ -5,8 +5,6 @@
 #pragma once
 
 #include <cstddef>
-#include <iomanip>
-#include <sstream>
 #include <string>
 #include <vector>
 #include "common/common_types.h"
@@ -19,42 +17,11 @@ std::string ToLower(std::string str);
 /// Make a string uppercase
 std::string ToUpper(std::string str);
 
-std::string ArrayToString(const u8* data, std::size_t size, int line_len = 20, bool spaces = true);
-
 std::string StripSpaces(const std::string& s);
 std::string StripQuotes(const std::string& s);
 
-// Thousand separator. Turns 12345678 into 12,345,678
-template <typename I>
-std::string ThousandSeparate(I value, int spaces = 0) {
-    std::ostringstream oss;
-
-// std::locale("") seems to be broken on many platforms
-#if defined _WIN32 || (defined __linux__ && !defined __clang__)
-    oss.imbue(std::locale(""));
-#endif
-    oss << std::setw(spaces) << value;
-
-    return oss.str();
-}
-
 std::string StringFromBool(bool value);
 
-bool TryParse(const std::string& str, bool* output);
-bool TryParse(const std::string& str, u32* output);
-
-template <typename N>
-static bool TryParse(const std::string& str, N* const output) {
-    std::istringstream iss(str);
-
-    N tmp = 0;
-    if (iss >> tmp) {
-        *output = tmp;
-        return true;
-    } else
-        return false;
-}
-
 std::string TabsToSpaces(int tab_size, std::string in);
 
 void SplitString(const std::string& str, char delim, std::vector<std::string>& output);
diff --git a/src/core/hle/service/ir/extra_hid.cpp b/src/core/hle/service/ir/extra_hid.cpp
index 31b63257e..2a00ac08f 100644
--- a/src/core/hle/service/ir/extra_hid.cpp
+++ b/src/core/hle/service/ir/extra_hid.cpp
@@ -165,8 +165,10 @@ void ExtraHID::OnDisconnect() {
 
 void ExtraHID::HandleConfigureHIDPollingRequest(const std::vector<u8>& request) {
     if (request.size() != 3) {
-        LOG_ERROR(Service_IR, "Wrong request size ({}): {}", request.size(),
-                  Common::ArrayToString(request.data(), request.size()));
+        std::string request_string;
+        for (auto request_part : request)
+            request_string += fmt::format("{:02x} ", request_part);
+        LOG_ERROR(Service_IR, "Wrong request size ({}): {}", request.size(), request_string);
         return;
     }
 
@@ -188,8 +190,11 @@ void ExtraHID::HandleReadCalibrationDataRequest(const std::vector<u8>& request_b
                   "ReadCalibrationDataRequest has wrong size");
 
     if (request_buf.size() != sizeof(ReadCalibrationDataRequest)) {
+        std::string request_buf_string;
+        for (auto request_buf_part : request_buf)
+            request_buf_string += fmt::format("{:02x} ", request_buf_part);
         LOG_ERROR(Service_IR, "Wrong request size ({}): {}", request_buf.size(),
-                  Common::ArrayToString(request_buf.data(), request_buf.size()));
+                  request_buf_string);
         return;
     }
 
@@ -223,8 +228,10 @@ void ExtraHID::OnReceive(const std::vector<u8>& data) {
         HandleReadCalibrationDataRequest(data);
         break;
     default:
-        LOG_ERROR(Service_IR, "Unknown request: {}",
-                  Common::ArrayToString(data.data(), data.size()));
+        std::string data_string;
+        for (auto data_part : data)
+            data_string += fmt::format("{:02x} ", data_part);
+        LOG_ERROR(Service_IR, "Unknown request: {}", data_string);
         break;
     }
 }
diff --git a/src/core/movie.cpp b/src/core/movie.cpp
index a0f237cf3..1374349f6 100644
--- a/src/core/movie.cpp
+++ b/src/core/movie.cpp
@@ -358,9 +358,9 @@ Movie::ValidationResult Movie::ValidateHeader(const CTMHeader& header, u64 progr
         return ValidationResult::Invalid;
     }
 
-    std::string revision =
-        Common::ArrayToString(header.revision.data(), header.revision.size(), 21, false);
-    revision = Common::ToLower(revision);
+    std::string revision;
+    for (auto header_part : header.revision)
+        revision += fmt::format("{:02x}", header_part);
 
     if (!program_id)
         Core::System::GetInstance().GetAppLoader().ReadProgramId(program_id);