diff --git a/CMakeLists.txt b/CMakeLists.txt
index a71fb23da..4a7bc47b2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,7 +23,6 @@ endif()
 set(BUILD_PLAYER_DEFAULT OFF)
 set(BUILD_LIBRETRO_DEFAULT OFF)
 set(BUILD_TOUCH_INPUT_DEFAULT ${ANDROID})
-set(BUILD_TOOLS OFF)
 set(BUILD_WITH_ALL_DEFAULT OFF)
 
 option(BUILD_STATIC "Static runtime" ${BUILD_STATIC_DEFAULT})
@@ -32,7 +31,8 @@ option(BUILD_SDL "SDL Enabled" ON)
 option(BUILD_SDLGPU "SDL GPU Enabled" OFF)
 option(BUILD_SOKOL "Sokol Enabled" OFF)
 option(BUILD_LIBRETRO "libretro Enabled" ${BUILD_LIBRETRO_DEFAULT})
-option(BUILD_TOOLS "bin2txt prj2cart" ${BUILD_TOOLS})
+option(BUILD_TOOLS "bin2txt prj2cart" OFF)
+option(BUILD_EDITORS "Build cart editors" ON)
 option(BUILD_PRO "Build PRO version" FALSE)
 option(BUILD_PLAYER "Build standalone players" ${BUILD_PLAYER_DEFAULT})
 option(BUILD_TOUCH_INPUT "Build with touch input support" ${BUILD_TOUCH_INPUT_DEFAULT})
diff --git a/cmake/studio.cmake b/cmake/studio.cmake
index ce3a0d6db..988f9f103 100644
--- a/cmake/studio.cmake
+++ b/cmake/studio.cmake
@@ -4,31 +4,37 @@
 
 set(TIC80LIB_DIR ${CMAKE_SOURCE_DIR}/src)
 set(TIC80STUDIO_SRC
-    ${TIC80LIB_DIR}/studio/screens/console.c
     ${TIC80LIB_DIR}/studio/screens/run.c
     ${TIC80LIB_DIR}/studio/screens/menu.c
     ${TIC80LIB_DIR}/studio/screens/mainmenu.c
-    ${TIC80LIB_DIR}/studio/screens/surf.c
     ${TIC80LIB_DIR}/studio/screens/start.c
-    ${TIC80LIB_DIR}/studio/editors/code.c
-    ${TIC80LIB_DIR}/studio/editors/sprite.c
-    ${TIC80LIB_DIR}/studio/editors/map.c
-    ${TIC80LIB_DIR}/studio/editors/world.c
-    ${TIC80LIB_DIR}/studio/editors/sfx.c
-    ${TIC80LIB_DIR}/studio/editors/music.c
     ${TIC80LIB_DIR}/studio/studio.c
     ${TIC80LIB_DIR}/studio/config.c
     ${TIC80LIB_DIR}/studio/fs.c
-    ${TIC80LIB_DIR}/studio/net.c
     ${TIC80LIB_DIR}/ext/md5.c
-    ${TIC80LIB_DIR}/ext/history.c
-    ${TIC80LIB_DIR}/ext/gif.c
-    ${TIC80LIB_DIR}/ext/png.c
     ${TIC80LIB_DIR}/ext/json.c
 )
 
-if(${BUILD_PRO})
-    set(TIC80STUDIO_SRC ${TIC80STUDIO_SRC} ${TIC80LIB_DIR}/studio/project.c)
+if(BUILD_EDITORS)
+    set(TIC80STUDIO_SRC ${TIC80STUDIO_SRC} 
+        ${TIC80LIB_DIR}/studio/screens/console.c
+        ${TIC80LIB_DIR}/studio/screens/surf.c
+        ${TIC80LIB_DIR}/studio/editors/code.c
+        ${TIC80LIB_DIR}/studio/editors/sprite.c
+        ${TIC80LIB_DIR}/studio/editors/map.c
+        ${TIC80LIB_DIR}/studio/editors/world.c
+        ${TIC80LIB_DIR}/studio/editors/sfx.c
+        ${TIC80LIB_DIR}/studio/editors/music.c
+        ${TIC80LIB_DIR}/studio/net.c
+        ${TIC80LIB_DIR}/ext/history.c
+        ${TIC80LIB_DIR}/ext/gif.c
+        ${TIC80LIB_DIR}/ext/png.c
+    )
+endif()
+
+if(BUILD_PRO)
+    set(TIC80STUDIO_SRC ${TIC80STUDIO_SRC} 
+        ${TIC80LIB_DIR}/studio/project.c)
 endif()
 
 set(TIC80_OUTPUT tic80)
@@ -57,4 +63,6 @@ if(BUILD_SDLGPU)
     target_compile_definitions(tic80studio PUBLIC CRT_SHADER_SUPPORT)
 endif()
 
-target_compile_definitions(tic80studio PUBLIC BUILD_EDITORS)
\ No newline at end of file
+if(BUILD_EDITORS)
+    target_compile_definitions(tic80studio PUBLIC BUILD_EDITORS)
+endif()
diff --git a/src/studio/config.c b/src/studio/config.c
index 42e4b41f9..2cb914c90 100644
--- a/src/studio/config.c
+++ b/src/studio/config.c
@@ -37,6 +37,8 @@
 #define INTEGER_SCALE_DEFAULT true
 #endif
 
+#define JSON(...) #__VA_ARGS__
+
 static void readConfig(Config* config) 
 {
     const char* json = config->cart->code.data;
@@ -150,16 +152,48 @@ static void save(Config* config)
     studioConfigChanged(config->studio);
 }
 
-static const char OptionsDatPath[] = TIC_LOCAL_VERSION "options.dat";
+static const char OptionsJsonPath[] = TIC_LOCAL "options.json";
+
+typedef struct
+{
+    char data[1024];
+} string;
 
-static void loadConfigData(tic_fs* fs, const char* path, void* dst, s32 size)
+static void loadOptions(Config* config)
 {
-    s32 dataSize = 0;
-    u8* data = (u8*)tic_fs_loadroot(fs, path, &dataSize);
+    s32 size;
+    u8* data = (u8*)tic_fs_loadroot(config->fs, OptionsJsonPath, &size);
 
     if(data) SCOPE(free(data))
-        if(dataSize == size)
-            memcpy(dst, data, size);
+    {
+        string json;
+        snprintf(json.data, sizeof json, "%.*s", size, data);
+
+        if(json_parse(json.data, strlen(json.data)))
+        {
+            struct StudioOptions* options = &config->data.options;
+
+#if defined(CRT_SHADER_SUPPORT)
+            options->crt = json_bool("crt", 0);
+#endif
+            options->fullscreen = json_bool("fullscreen", 0);
+            options->vsync = json_bool("vsync", 0);
+            options->integerScale = json_bool("integerScale", 0);
+            options->volume = json_int("volume", 0);
+            options->autosave = json_bool("autosave", 0);
+
+            string mapping;
+            json_string("mapping", 0, mapping.data, sizeof mapping);
+            tic_tool_str2buf(mapping.data, strlen(mapping.data), &options->mapping, false);
+
+#if defined(BUILD_EDITORS)
+            options->keybindMode = json_int("keybindMode", 0);
+            options->tabMode = json_int("tabMode", 0);
+            options->devmode = json_bool("devmode", 0);
+            options->tabSize = json_int("tabSize", 0);
+#endif
+        }
+    }
 }
 
 void initConfig(Config* config, Studio* studio, tic_fs* fs)
@@ -190,7 +224,7 @@ void initConfig(Config* config, Studio* studio, tic_fs* fs)
         else saveConfig(config, false);        
     }
 
-    loadConfigData(fs, OptionsDatPath, &config->data.options, sizeof config->data.options);
+    loadOptions(config);
 
 #if defined(__TIC_LINUX__)
     // do not load fullscreen option on Linux
@@ -200,9 +234,68 @@ void initConfig(Config* config, Studio* studio, tic_fs* fs)
     tic_api_reset(config->tic);
 }
 
+static string data2str(const void* data, s32 size)
+{
+    string res;
+    tic_tool_buf2str(data, size, res.data, false);
+    return res;
+}
+
+static const char* bool2str(bool value)
+{
+    return value ? "true" : "false";
+}
+
+static void saveOptions(Config* config)
+{
+    const struct StudioOptions* options = &config->data.options;
+
+    string buf;
+    sprintf(buf.data, JSON(
+        {
+#if defined(CRT_SHADER_SUPPORT)
+            "crt":%s,
+#endif
+            "fullscreen":%s,
+            "vsync":%s,
+            "integerScale":%s,
+            "volume":%i,
+            "autosave":%s,
+            "mapping":"%s"
+#if defined(BUILD_EDITORS)
+            ,
+            "keybindMode":%i,
+            "tabMode":%i,
+            "devmode":%s,
+            "tabSize":%i
+#endif
+        })
+        , 
+#if defined(CRT_SHADER_SUPPORT)
+        bool2str(options->crt),
+#endif
+        bool2str(options->fullscreen),
+        bool2str(options->vsync),
+        bool2str(options->integerScale),
+        options->volume,
+        bool2str(options->autosave),
+        data2str(&options->mapping, sizeof options->mapping).data
+
+#if defined(BUILD_EDITORS)
+        ,
+        options->keybindMode,
+        options->tabMode,
+        bool2str(options->devmode),
+        options->tabSize
+#endif
+        );
+
+    tic_fs_saveroot(config->fs, OptionsJsonPath, buf.data, strlen(buf.data), true);
+}
+
 void freeConfig(Config* config)
 {
-    tic_fs_saveroot(config->fs, OptionsDatPath, &config->data.options, sizeof config->data.options, true);
+    saveOptions(config);
 
     free(config->cart);
     free(config);
diff --git a/src/studio/project.c b/src/studio/project.c
index d1d8c70e4..951c1c44a 100644
--- a/src/studio/project.c
+++ b/src/studio/project.c
@@ -51,17 +51,6 @@ static void makeTag(const char* tag, char* out, s32 bank)
     else strcpy(out, tag);
 }
 
-static void buf2str(const void* data, s32 size, char* ptr, bool flip)
-{
-    enum {Len = 2};
-
-    for(s32 i = 0; i < size; i++, ptr+=Len)
-    {
-        sprintf(ptr, "%02x", ((u8*)data)[i]);
-        if(flip) SWAP(ptr[0], ptr[1], char);
-    }
-}
-
 static bool bufferEmpty(const u8* data, s32 size)
 {
     for(s32 i = 0; i < size; i++)
@@ -90,7 +79,7 @@ static char* saveBinaryBuffer(char* ptr, const char* comment, const void* data,
     sprintf(ptr, "%s %03i:", comment, row);
     ptr += strlen(ptr);
 
-    buf2str(data, size, ptr, flip);
+    tic_tool_buf2str(data, size, ptr, flip);
     ptr += strlen(ptr);
 
     sprintf(ptr, "\n");
diff --git a/src/studio/screens/run.c b/src/studio/screens/run.c
index 313aa74d3..e2e1986e6 100644
--- a/src/studio/screens/run.c
+++ b/src/studio/screens/run.c
@@ -68,12 +68,10 @@ static const char* data2md5(const void* data, s32 length)
     }
 
     {
-        enum{Size = 16};
-        u8 digest[Size];
+        u8 digest[16];
         MD5_Final(digest, &c);
 
-        for (s32 n = 0; n < Size; ++n)
-            snprintf(out + n*2, sizeof("ff"), "%02x", digest[n]);
+        tic_tool_buf2str(digest, sizeof digest, out, false);
     }
 
     return out;
diff --git a/src/studio/studio.c b/src/studio/studio.c
index 97a1fe63e..e6214cf44 100644
--- a/src/studio/studio.c
+++ b/src/studio/studio.c
@@ -563,18 +563,7 @@ void toClipboard(const void* data, s32 size, bool flip)
         {
             char* ptr = clipboard;
 
-            for(s32 i = 0; i < size; i++, ptr+=Len)
-            {
-                sprintf(ptr, "%02x", ((u8*)data)[i]);
-
-                if(flip)
-                {
-                    char tmp = ptr[0];
-                    ptr[0] = ptr[1];
-                    ptr[1] = tmp;
-                }
-            }
-
+            tic_tool_buf2str(data, size, clipboard, flip);
             tic_sys_clipboard_set(clipboard);
             free(clipboard);
         }
@@ -1745,6 +1734,8 @@ static bool enterWasPressedOnce(Studio* studio)
            keyWasPressedOnce(studio, tic_key_numpadenter);
 }
 
+#if defined(BUILD_EDITORS)
+
 static bool isDevMode(Studio* studio)
 {
     tic_mem* tic = studio->tic;
@@ -1759,6 +1750,8 @@ static bool isDevMode(Studio* studio)
     return getConfig(studio)->options.devmode;
 }
 
+#endif
+
 static void processShortcuts(Studio* studio)
 {
     tic_mem* tic = studio->tic;
diff --git a/src/tools.c b/src/tools.c
index 6c8f0d279..ab15efc4a 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -171,6 +171,15 @@ bool tic_tool_noise(const tic_waveform* wave)
     return FLAT4(wave->data) && *wave->data % 0xff == 0;
 }
 
+void tic_tool_buf2str(const void* data, s32 size, char* str, bool flip)
+{
+    for(s32 i = 0; i < size; i++, str += 2)
+    {
+        sprintf(str, "%02x", ((u8*)data)[i]);
+        if(flip) SWAP(str[0], str[1], char);
+    }
+}
+
 void tic_tool_str2buf(const char* str, s32 size, void* buf, bool flip)
 {
     char val[] = "0x00";
diff --git a/src/tools.h b/src/tools.h
index 4b4033ed5..60a503c49 100644
--- a/src/tools.h
+++ b/src/tools.h
@@ -94,6 +94,8 @@ void    tic_tool_set_pattern_id(tic_track* track, s32 frame, s32 channel, s32 id
 bool    tic_tool_has_ext(const char* name, const char* ext);
 s32     tic_tool_get_track_row_sfx(const tic_track_row* row);
 void    tic_tool_set_track_row_sfx(tic_track_row* row, s32 sfx);
+
+void    tic_tool_buf2str(const void* data, s32 size, char* str, bool flip);
 void    tic_tool_str2buf(const char* str, s32 size, void* buf, bool flip);
 
 u32     tic_tool_zip(void* dest, s32 destSize, const void* source, s32 size);