diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 4ff2afe7..ca5365ce 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -49,8 +49,7 @@ jobs:
           cmake -G "${{ matrix.config.GENERATOR }}"  -A x64 `
             -D CMAKE_BUILD_TYPE=${{ matrix.config.BUILD_TYPE }} `
             -D BUILD_SHARED_LIBS=${{ matrix.config.BUILD_SHARED }} `
-            -D SPDLOG_WCHAR_SUPPORT=${{ matrix.config.WCHAR }} `
-            -D SPDLOG_WCHAR_FILENAMES=${{ matrix.config.WCHAR_FILES }} `
+            -D SPDLOG_WCHAR_SUPPORT=${{ matrix.config.WCHAR }} `            
             -D SPDLOG_BUILD_EXAMPLE=${{ matrix.config.BUILD_EXAMPLE }} `
             -D SPDLOG_BUILD_TESTS=ON `
             -D SPDLOG_BUILD_WARNINGS=${{ matrix.config.FATAL_ERRORS }} `
@@ -83,7 +82,6 @@ jobs:
             BUILD_SHARED: 'ON'
             FATAL_ERRORS: 'ON'
             WCHAR: 'OFF'
-            WCHAR_FILES: 'OFF'
             BUILD_EXAMPLE: 'ON'
             CXX_STANDARD: 17
           - GENERATOR: "Visual Studio 16 2019"
@@ -91,7 +89,6 @@ jobs:
             BUILD_SHARED: 'ON'
             FATAL_ERRORS: 'ON'
             WCHAR: 'OFF'
-            WCHAR_FILES: 'OFF'
             BUILD_EXAMPLE: 'ON'
             CXX_STANDARD: 20
 
@@ -107,8 +104,7 @@ jobs:
           cmake -G "${{ matrix.config.GENERATOR }}"  -A x64 `
             -D CMAKE_BUILD_TYPE=${{ matrix.config.BUILD_TYPE }} `
             -D BUILD_SHARED_LIBS=${{ matrix.config.BUILD_SHARED }} `
-            -D SPDLOG_WCHAR_SUPPORT=${{ matrix.config.WCHAR }} `
-            -D SPDLOG_WCHAR_FILENAMES=${{ matrix.config.WCHAR_FILES }} `
+            -D SPDLOG_WCHAR_SUPPORT=${{ matrix.config.WCHAR }} `            
             -D SPDLOG_BUILD_EXAMPLE=${{ matrix.config.BUILD_EXAMPLE }} `
             -D SPDLOG_BUILD_TESTS=ON `
             -D SPDLOG_BUILD_WARNINGS=${{ matrix.config.FATAL_ERRORS }} `
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 20f6a7df..8f6ca16d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -78,13 +78,6 @@ option(SPDLOG_INSTALL "Generate the install target" ${SPDLOG_MASTER_PROJECT})
 option(SPDLOG_FMT_EXTERNAL "Use external fmt library instead of of fetching from gitub." OFF)
 option(SPDLOG_NO_EXCEPTIONS "Compile with -fno-exceptions. Call abort() on any spdlog exceptions" OFF)
 
-# misc tweakme options
-if(WIN32)
-    option(SPDLOG_WCHAR_FILENAMES "Support wchar filenames" OFF)
-else()
-    set(SPDLOG_WCHAR_FILENAMES OFF CACHE BOOL "non supported option" FORCE)
-endif()
-
 if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
     option(SPDLOG_CLOCK_COARSE "Use CLOCK_REALTIME_COARSE instead of the regular clock," OFF)
 else()
diff --git a/cmake/spdlog_config.h.in b/cmake/spdlog_config.h.in
index 4dfdd820..617692e4 100644
--- a/cmake/spdlog_config.h.in
+++ b/cmake/spdlog_config.h.in
@@ -6,8 +6,6 @@
 
 #pragma once
 
-// Support wchar filenames (Windows only)
-#cmakedefine SPDLOG_WCHAR_FILENAMES
 
 // No exceptions. Will do std::abort() instead
 #cmakedefine SPDLOG_NO_EXCEPTIONS
diff --git a/include/spdlog/common.h b/include/spdlog/common.h
index d076d455..7f489a92 100644
--- a/include/spdlog/common.h
+++ b/include/spdlog/common.h
@@ -39,9 +39,6 @@
 
 #define SPDLOG_FMT_RUNTIME(format_string) fmt::runtime(format_string)
 #define SPDLOG_FMT_STRING(format_string) FMT_STRING(format_string)
-#if defined(SPDLOG_WCHAR_FILENAMES)
-    #include "fmt/xchar.h"
-#endif
 
 #ifndef SPDLOG_FUNCTION
     #define SPDLOG_FUNCTION static_cast<const char *>(__FUNCTION__)
@@ -71,15 +68,8 @@ namespace sinks {
 class sink;
 }
 
-#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
-using filename_t = std::wstring;
-// allow macro expansion to occur in SPDLOG_FILENAME_T
-    #define SPDLOG_FILENAME_T_INNER(s) L##s
-    #define SPDLOG_FILENAME_T(s) SPDLOG_FILENAME_T_INNER(s)
-#else
 using filename_t = std::string;
-    #define SPDLOG_FILENAME_T(s) s
-#endif
+#define SPDLOG_FILENAME_T(s) s
 
 using log_clock = std::chrono::system_clock;
 using sink_ptr = std::shared_ptr<sinks::sink>;
@@ -199,14 +189,6 @@ namespace details {
 
 [[nodiscard]] constexpr spdlog::string_view_t to_string_view(spdlog::string_view_t str) noexcept { return str; }
 
-#if defined(SPDLOG_WCHAR_FILENAMES)
-[[nodiscard]] constexpr spdlog::wstring_view_t to_string_view(const wmemory_buf_t &buf) noexcept {
-    return spdlog::wstring_view_t{buf.data(), buf.size()};
-}
-
-[[nodiscard]] constexpr spdlog::wstring_view_t to_string_view(spdlog::wstring_view_t str) noexcept { return str; }
-#endif
-
 template <typename T, typename... Args>
 [[nodiscard]] constexpr fmt::basic_string_view<T> to_string_view(fmt::basic_format_string<T, Args...> fmt) noexcept {
     return fmt;
diff --git a/include/spdlog/details/os.h b/include/spdlog/details/os.h
index 332fb7ff..541acf0a 100644
--- a/include/spdlog/details/os.h
+++ b/include/spdlog/details/os.h
@@ -75,12 +75,6 @@ SPDLOG_API bool is_color_terminal() noexcept;
 // Source: https://github.com/agauniyal/rang/
 SPDLOG_API bool in_terminal(FILE *file) noexcept;
 
-#if defined(SPDLOG_WCHAR_FILENAMES) && defined(_WIN32)
-SPDLOG_API void wstr_to_utf8buf(wstring_view_t wstr, memory_buf_t &target);
-
-SPDLOG_API void utf8_to_wstrbuf(string_view_t str, wmemory_buf_t &target);
-#endif
-
 // Return directory name from given path or empty string
 // "abc/file" => "abc"
 // "abc/" => "abc"
diff --git a/include/spdlog/sinks/daily_file_sink.h b/include/spdlog/sinks/daily_file_sink.h
index e15a00da..d8f2a100 100644
--- a/include/spdlog/sinks/daily_file_sink.h
+++ b/include/spdlog/sinks/daily_file_sink.h
@@ -45,13 +45,9 @@ struct daily_filename_calculator {
  */
 struct daily_filename_format_calculator {
     static filename_t calc_filename(const filename_t &file_path, const tm &now_tm) {
-#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
-        std::wstringstream stream;
-#else
-        std::stringstream stream;
-#endif
-        stream << std::put_time(&now_tm, file_path.c_str());
-        return stream.str();
+    std::stringstream stream;
+    stream << std::put_time(&now_tm, file_path.c_str());
+    return stream.str();
     }
 };
 
diff --git a/src/details/os_windows.cpp b/src/details/os_windows.cpp
index 3b689225..8fdcc569 100644
--- a/src/details/os_windows.cpp
+++ b/src/details/os_windows.cpp
@@ -31,11 +31,6 @@
     #include <share.h>
 #endif
 
-#if defined(SPDLOG_WCHAR_FILENAMES)
-    #include <cassert>
-    #include <limits>
-#endif
-
 #include <direct.h>  // for _mkdir/_wmkdir
 
 // clang-format on
@@ -67,11 +62,7 @@ std::tm gmtime() noexcept {
 }
 
 bool fopen_s(FILE **fp, const filename_t &filename, const filename_t &mode) {
-#ifdef SPDLOG_WCHAR_FILENAMES
-    *fp = ::_wfsopen((filename.c_str()), mode.c_str(), _SH_DENYNO);
-#else
     *fp = ::_fsopen((filename.c_str()), mode.c_str(), _SH_DENYNO);
-#endif
 #if defined(SPDLOG_PREVENT_CHILD_FD)
     if (*fp != nullptr) {
         auto file_handle = reinterpret_cast<HANDLE>(_get_osfhandle(::_fileno(*fp)));
@@ -85,31 +76,19 @@ bool fopen_s(FILE **fp, const filename_t &filename, const filename_t &mode) {
 }
 
 int remove(const filename_t &filename) noexcept {
-#if defined(SPDLOG_WCHAR_FILENAMES)
-    return ::_wremove(filename.c_str());
-#else
     return std::remove(filename.c_str());
-#endif
 }
 
 int remove_if_exists(const filename_t &filename) noexcept { return path_exists(filename) ? remove(filename) : 0; }
 
 int rename(const filename_t &filename1, const filename_t &filename2) noexcept {
-#if defined(SPDLOG_WCHAR_FILENAMES)
-    return ::_wrename(filename1.c_str(), filename2.c_str());
-#else
     return std::rename(filename1.c_str(), filename2.c_str());
-#endif
 }
 
 // Return true if path exists (file or directory)
 bool path_exists(const filename_t &filename) noexcept {
     struct _stat buffer;
-#ifdef SPDLOG_WCHAR_FILENAMES
-    return (::_wstat(filename.c_str(), &buffer) == 0);
-#else
     return (::_stat(filename.c_str(), &buffer) == 0);
-#endif
 }
 
 #ifdef _MSC_VER
@@ -180,16 +159,7 @@ size_t thread_id() noexcept {
 // See https://github.com/gabime/spdlog/issues/609
 void sleep_for_millis(unsigned int milliseconds) noexcept { ::Sleep(milliseconds); }
 
-// wchar support for windows file names (SPDLOG_WCHAR_FILENAMES must be defined)
-#if defined(SPDLOG_WCHAR_FILENAMES)
-std::string filename_to_str(const filename_t &filename) {
-    memory_buf_t buf;
-    wstr_to_utf8buf(filename, buf);
-    return SPDLOG_BUF_TO_STRING(buf);
-}
-#else
 std::string filename_to_str(const filename_t &filename) { return filename; }
-#endif
 
 int pid() noexcept { return static_cast<int>(::GetCurrentProcessId()); }
 
@@ -197,72 +167,9 @@ bool is_color_terminal() noexcept { return true; }
 
 // Determine if the terminal attached
 bool in_terminal(FILE *file) noexcept { return ::_isatty(_fileno(file)) != 0; }
-
-#if defined(SPDLOG_WCHAR_FILENAMES)
-void wstr_to_utf8buf(wstring_view_t wstr, memory_buf_t &target) {
-    if (wstr.size() > static_cast<size_t>((std::numeric_limits<int>::max)()) / 4 - 1) {
-        throw_spdlog_ex("UTF-16 string is too big to be converted to UTF-8");
-    }
-
-    int wstr_size = static_cast<int>(wstr.size());
-    if (wstr_size == 0) {
-        target.resize(0);
-        return;
-    }
-
-    int result_size = static_cast<int>(target.capacity());
-    if ((wstr_size + 1) * 4 > result_size) {
-        result_size = ::WideCharToMultiByte(CP_UTF8, 0, wstr.data(), wstr_size, NULL, 0, NULL, NULL);
-    }
-
-    if (result_size > 0) {
-        target.resize(result_size);
-        result_size = ::WideCharToMultiByte(CP_UTF8, 0, wstr.data(), wstr_size, target.data(), result_size, NULL, NULL);
-
-        if (result_size > 0) {
-            target.resize(result_size);
-            return;
-        }
-    }
-
-    throw_spdlog_ex(fmt_lib::format("WideCharToMultiByte failed. Last error: {}", ::GetLastError()));
-}
-
-void utf8_to_wstrbuf(string_view_t str, wmemory_buf_t &target) {
-    if (str.size() > static_cast<size_t>((std::numeric_limits<int>::max)()) - 1) {
-        throw_spdlog_ex("UTF-8 string is too big to be converted to UTF-16");
-    }
-
-    int str_size = static_cast<int>(str.size());
-    if (str_size == 0) {
-        target.resize(0);
-        return;
-    }
-
-    // find the size to allocate for the result buffer
-    int result_size = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, str.data(), str_size, NULL, 0);
-
-    if (result_size > 0) {
-        target.resize(result_size);
-        result_size = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, str.data(), str_size, target.data(), result_size);
-        if (result_size > 0) {
-            assert(result_size == target.size());
-            return;
-        }
-    }
-
-    throw_spdlog_ex(fmt_lib::format("MultiByteToWideChar failed. Last error: {}", ::GetLastError()));
-}
-#endif  // defined(SPDLOG_WCHAR_FILENAMES)
-
 // return true on success
 static bool mkdir_(const filename_t &path) {
-#
-#ifdef SPDLOG_WCHAR_FILENAMES
-    return ::_wmkdir(path.c_str()) == 0;
-#else
     return ::_mkdir(path.c_str()) == 0;
-#endif
 }
 
 // create the given directory - and all directories leading to it
diff --git a/tests/test_daily_and_rotation_loggers.cpp b/tests/test_daily_and_rotation_loggers.cpp
index 619d95c7..630271dd 100644
--- a/tests/test_daily_and_rotation_loggers.cpp
+++ b/tests/test_daily_and_rotation_loggers.cpp
@@ -8,17 +8,6 @@
 
 using filename_memory_buf_t = spdlog::memory_buf_t;
 
-// #ifdef SPDLOG_WCHAR_FILENAMES
-// std::string filename_buf_to_utf8string(const filename_memory_buf_t &w) {
-//     spdlog::memory_buf_t buf;
-//     spdlog::details::os::wstr_to_utf8buf(spdlog::wstring_view_t(w.data(), w.size()), buf);
-//     return SPDLOG_BUF_TO_STRING(buf);
-// }
-// #else
-// std::string filename_buf_to_utf8string(const filename_memory_buf_t &w) { return SPDLOG_BUF_TO_STRING(w); }
-// #endif
-
-std::string filename_buf_to_utf8string(const filename_memory_buf_t &w) { return SPDLOG_BUF_TO_STRING(w); }
 
 TEST_CASE("daily_logger with dateonly calculator", "[daily_logger]") {
     using sink_type = spdlog::sinks::daily_file_sink<std::mutex, spdlog::sinks::daily_filename_calculator>;
@@ -38,7 +27,7 @@ TEST_CASE("daily_logger with dateonly calculator", "[daily_logger]") {
     }
     logger->flush();
 
-    require_message_count(filename_buf_to_utf8string(w), 10);
+    require_message_count(SPDLOG_BUF_TO_STRING(w), 10);
 }
 
 struct custom_daily_file_name_calculator {
@@ -69,7 +58,7 @@ TEST_CASE("daily_logger with custom calculator", "[daily_logger]") {
     }
 
     logger->flush();
-    require_message_count(filename_buf_to_utf8string(w), 10);
+    require_message_count(SPDLOG_BUF_TO_STRING(w), 10);
 }
 
 /*