diff -r 0df5128ab675 -r 4b9537f93239 src/cx/json.h
--- a/src/cx/json.h	Sat Dec 13 20:44:57 2025 +0100
+++ b/src/cx/json.h	Sat Dec 13 20:47:07 2025 +0100
@@ -296,6 +296,7 @@
      * The allocator used for produced JSON values.
      */
     const CxAllocator *allocator;
+
     /**
      * The input buffer.
      */
@@ -1376,6 +1377,54 @@
  */
 CX_EXPORT int cxJsonCompare(const CxJsonValue *json, const CxJsonValue *other);
 
+
+/**
+ * Creates a deep copy of the specified JSON value.
+ *
+ * If you need a @c cx_clone_func compatible version, see cxJsonCloneFunc().
+ *
+ * @note when you are cloning @c NULL, you will get a pointer to a statically
+ * allocated value which represents nothing.
+ *
+ * @param value the value to be cloned
+ * @param allocator the allocator for the new value
+ * @return the new value or @c NULL if any allocation was unsuccessful
+ * @see cxJsonCloneFunc()
+ */
+cx_attr_nodiscard
+CX_EXPORT CxJsonValue* cxJsonClone(const CxJsonValue* value,
+        const CxAllocator* allocator);
+
+
+/**
+ * A @c cx_clone_func compatible version of cxJsonClone().
+ *
+ * Internal function - use cxJsonCloneFunc() to get a properly casted function pointer.
+ *
+ * @param target the target memory or @c NULL
+ * @param source the value to be cloned
+ * @param allocator the allocator for the new value
+ * @param data unused
+ * @return the new value or @c NULL if any allocation was unsuccessful
+ * @see cxJsonClone()
+ */
+cx_attr_nodiscard
+CX_EXPORT CxJsonValue* cx_json_clone_func(
+        CxJsonValue* target, const CxJsonValue* source,
+        const CxAllocator* allocator, void *data);
+
+/**
+ * A @c cx_clone_func compatible version of cxJsonClone().
+ *
+ * @param target (@c CxJsonValue*) the target memory or @c NULL
+ * @param source (@c CxJsonValue*) the value to be cloned
+ * @param allocator (@c CxAllocator*) the allocator for the new value
+ * @param data unused
+ * @return the new value or @c NULL if any allocation was unsuccessful
+ * @see cxJsonClone()
+ */
+#define cxJsonCloneFunc  ((cx_clone_func) cx_json_clone_func)
+
 #ifdef __cplusplus
 }
 #endif