diff -r c8dd35f3ea53 -r 12da0654e4a9 src/cx/json.h
--- a/src/cx/json.h	Sat Dec 06 16:22:19 2025 +0100
+++ b/src/cx/json.h	Sat Dec 06 16:30:11 2025 +0100
@@ -41,6 +41,7 @@
 #include "string.h"
 #include "buffer.h"
 #include "array_list.h"
+#include "map.h"
 
 #include <string.h>
 
@@ -188,9 +189,10 @@
  */
 typedef struct cx_json_array_s CxJsonArray;
 /**
- * Type alias for the JSON object struct.
+ * Type alias for the map representing a JSON object.
+ * The map contains pointers of type @c CxJsonValue.
  */
-typedef struct cx_json_object_s CxJsonObject;
+typedef CxMap* CxJsonObject;
 /**
  * Type alias for a JSON string.
  */
@@ -209,11 +211,6 @@
 typedef enum cx_json_literal CxJsonLiteral;
 
 /**
- * Type alias for a key/value pair in a JSON object.
- */
-typedef struct cx_json_obj_value_s CxJsonObjValue;
-
-/**
  * JSON array structure.
  */
 struct cx_json_array_s {
@@ -224,34 +221,6 @@
 };
 
 /**
- * JSON object structure.
- */
-struct cx_json_object_s {
-    /**
-     * The key/value entries.
-     */
-    CX_ARRAY_DECLARE(CxJsonObjValue, values);
-    /**
-     * The original indices to reconstruct the order in which the members were added.
-     */
-    size_t *indices;
-};
-
-/**
- * Structure for a key/value entry in a JSON object.
- */
-struct cx_json_obj_value_s {
-    /**
-     * The key (or name in JSON terminology) of the value.
-     */
-    cxmutstr name;
-    /**
-     * The value.
-     */
-    CxJsonValue *value;
-};
-
-/**
  * Structure for a JSON value.
  */
 struct cx_json_value_s {
@@ -349,11 +318,11 @@
     CxJsonValue *parsed;
 
     /**
-     * A pointer to an intermediate state of a currently parsed object member.
+     * The name of a not yet completely parsed object member.
      *
      * Never access this value manually.
      */
-    CxJsonObjValue uncompleted_member;
+    cxmutstr uncompleted_member_name;
 
     /**
      * State stack.
@@ -439,10 +408,6 @@
      */
     bool pretty;
     /**
-     * Set false to output the members in the order in which they were added.
-     */
-    bool sort_members;
-    /**
      * The maximum number of fractional digits in a number value.
      * The default value is 6 and values larger than 15 are reduced to 15.
      * Note that the actual number of digits may be lower, depending on the concrete number.
@@ -1277,14 +1242,14 @@
  */
 cx_attr_nonnull
 CX_INLINE size_t cxJsonObjSize(const CxJsonValue *value) {
-    return value->object.values_size;
+    return cxCollectionSize(value->object);
 }
 
 /**
- * Returns an iterator over the JSON object members.
+ * Returns a map iterator over the JSON object members.
  *
- * The iterator yields values of type @c CxJsonObjValue* which
- * contain the name and value of the member.
+ * The iterator yields values of type @c CxMapEntry* which
+ * contain the name and the @c CxJsonObjValue* of the member.
  *
  * If the @p value is not a JSON object, the behavior is undefined.
  *
@@ -1293,7 +1258,7 @@
  * @see cxJsonIsObject()
  */
 cx_attr_nonnull cx_attr_nodiscard
-CX_EXPORT CxIterator cxJsonObjIter(const CxJsonValue *value);
+CX_EXPORT CxMapIterator cxJsonObjIter(const CxJsonValue *value);
 
 /**
  * Internal function, do not use.