diff --git a/src/bej_decoder_json.cpp b/src/bej_decoder_json.cpp
new file mode 100644
index 0000000..f6624c7
--- /dev/null
+++ b/src/bej_decoder_json.cpp
@@ -0,0 +1,381 @@
+#include "bej_decoder_json.hpp"
+
+namespace libbej
+{
+
+/**
+ * @brief This structure is used to pass additional data to callback functions.
+ */
+struct BejJsonParam
+{
+    bool* isPrevAnnotated;
+    std::string* output;
+};
+
+/**
+ * @brief Add a property name to output buffer.
+ *
+ * @param[in] params - a valid BejJsonParam struct.
+ * @param[in] propertyName - a NULL terminated string.
+ */
+static void addPropertyNameToOutput(struct BejJsonParam* params,
+                                    const char* propertyName)
+{
+    if (propertyName[0] == '\0')
+    {
+        return;
+    }
+    if (!(*params->isPrevAnnotated))
+    {
+        params->output->push_back('\"');
+    }
+    params->output->append(propertyName);
+    params->output->append("\":");
+}
+
+/**
+ * @brief Callback for bejSet start.
+ *
+ * @param[in] propertyName - a NULL terminated string.
+ * @param[in] dataPtr - pointing to a valid BejJsonParam struct.
+ * @return 0 if successful.
+ */
+static int callbackSetStart(const char* propertyName, void* dataPtr)
+{
+    struct BejJsonParam* params =
+        reinterpret_cast<struct BejJsonParam*>(dataPtr);
+    addPropertyNameToOutput(params, propertyName);
+    params->output->push_back('{');
+    *params->isPrevAnnotated = false;
+    return 0;
+}
+
+/**
+ * @brief Callback for bejSet end.
+ *
+ * @param[in] dataPtr - pointing to a valid BejJsonParam struct.
+ * @return 0 if successful.
+ */
+static int callbackSetEnd(void* dataPtr)
+{
+    struct BejJsonParam* params =
+        reinterpret_cast<struct BejJsonParam*>(dataPtr);
+    params->output->push_back('}');
+    return 0;
+}
+
+/**
+ * @brief Callback for bejArray start.
+ *
+ * @param[in] propertyName - a NULL terminated string.
+ * @param[in] dataPtr - pointing to a valid BejJsonParam struct.
+ * @return 0 if successful.
+ */
+static int callbackArrayStart(const char* propertyName, void* dataPtr)
+{
+    struct BejJsonParam* params =
+        reinterpret_cast<struct BejJsonParam*>(dataPtr);
+    addPropertyNameToOutput(params, propertyName);
+    params->output->push_back('[');
+    *params->isPrevAnnotated = false;
+    return 0;
+}
+
+/**
+ * @brief Callback for bejArray end.
+ *
+ * @param[in] dataPtr - pointing to a valid BejJsonParam struct.
+ * @return 0 if successful.
+ */
+static int callbackArrayEnd(void* dataPtr)
+{
+    struct BejJsonParam* params =
+        reinterpret_cast<struct BejJsonParam*>(dataPtr);
+    params->output->push_back(']');
+    return 0;
+}
+
+/**
+ * @brief Callback when an end of a property is detected.
+ *
+ * @param[in] dataPtr - pointing to a valid BejJsonParam struct.
+ * @return 0 if successful.
+ */
+static int callbackPropertyEnd(void* dataPtr)
+{
+    struct BejJsonParam* params =
+        reinterpret_cast<struct BejJsonParam*>(dataPtr);
+    // Not a section ending. So add a comma.
+    params->output->push_back(',');
+    return 0;
+}
+
+/**
+ * @brief Callback for bejNull type.
+ *
+ * @param[in] propertyName - a NULL terminated string.
+ * @param[in] dataPtr - pointing to a valid BejJsonParam struct.
+ * @return 0 if successful.
+ */
+static int callbackNull(const char* propertyName, void* dataPtr)
+{
+    struct BejJsonParam* params =
+        reinterpret_cast<struct BejJsonParam*>(dataPtr);
+    addPropertyNameToOutput(params, propertyName);
+    params->output->append("null");
+    *params->isPrevAnnotated = false;
+    return 0;
+}
+
+/**
+ * @brief Callback for bejInteger type.
+ *
+ * @param[in] propertyName - a NULL terminated string.
+ * @param[in] value - integer value.
+ * @param[in] dataPtr - pointing to a valid BejJsonParam struct.
+ * @return 0 if successful.
+ */
+static int callbackInteger(const char* propertyName, int64_t value,
+                           void* dataPtr)
+{
+    struct BejJsonParam* params =
+        reinterpret_cast<struct BejJsonParam*>(dataPtr);
+    addPropertyNameToOutput(params, propertyName);
+    params->output->append(std::to_string(value));
+    *params->isPrevAnnotated = false;
+    return 0;
+}
+
+/**
+ * @brief Callback for bejEnum type.
+ *
+ * @param[in] propertyName - a NULL terminated string.
+ * @param[in] value - a NULL terminated string.
+ * @param[in] dataPtr - pointing to a valid BejJsonParam struct.
+ * @return 0 if successful.
+ */
+static int callbackEnum(const char* propertyName, const char* value,
+                        void* dataPtr)
+{
+    struct BejJsonParam* params =
+        reinterpret_cast<struct BejJsonParam*>(dataPtr);
+    addPropertyNameToOutput(params, propertyName);
+    params->output->push_back('\"');
+    params->output->append(value);
+    params->output->push_back('\"');
+    *params->isPrevAnnotated = false;
+    return 0;
+}
+
+/**
+ * @brief Callback for bejString type.
+ *
+ * @param[in] propertyName - a NULL terminated string.
+ * @param[in] value - a NULL terminated string.
+ * @param[in] dataPtr - pointing to a valid BejJsonParam struct.
+ * @return 0 if successful.
+ */
+static int callbackString(const char* propertyName, const char* value,
+                          void* dataPtr)
+{
+    struct BejJsonParam* params =
+        reinterpret_cast<struct BejJsonParam*>(dataPtr);
+    addPropertyNameToOutput(params, propertyName);
+    params->output->push_back('\"');
+    params->output->append(value);
+    params->output->push_back('\"');
+    *params->isPrevAnnotated = false;
+    return 0;
+}
+
+/**
+ * @brief Callback for bejReal type.
+ *
+ * @param[in] propertyName - a NULL terminated string.
+ * @param[in] value - pointing to a valid BejReal.
+ * @param[in] dataPtr - pointing to a valid BejJsonParam struct.
+ * @return 0 if successful.
+ */
+static int callbackReal(const char* propertyName, const struct BejReal* value,
+                        void* dataPtr)
+{
+    struct BejJsonParam* params =
+        reinterpret_cast<struct BejJsonParam*>(dataPtr);
+
+    addPropertyNameToOutput(params, propertyName);
+    params->output->append(std::to_string(value->whole));
+    params->output->push_back('.');
+    params->output->insert(params->output->cend(), value->zeroCount, '0');
+    params->output->append(std::to_string(value->fract));
+    if (value->expLen != 0)
+    {
+        params->output->push_back('e');
+        params->output->append(std::to_string(value->exp));
+    }
+    *params->isPrevAnnotated = false;
+    return 0;
+}
+
+/**
+ * @brief Callback for bejBoolean type.
+ *
+ * @param[in] propertyName - a NULL terminated string.
+ * @param[in] value - boolean value.
+ * @param[in] dataPtr - pointing to a valid BejJsonParam struct.
+ * @return 0 if successful.
+ */
+static int callbackBool(const char* propertyName, bool value, void* dataPtr)
+{
+    struct BejJsonParam* params =
+        reinterpret_cast<struct BejJsonParam*>(dataPtr);
+    addPropertyNameToOutput(params, propertyName);
+    params->output->append(value ? "true" : "false");
+    *params->isPrevAnnotated = false;
+    return 0;
+}
+
+/**
+ * @brief Callback for bejPropertyAnnotation type.
+ *
+ * @param[in] propertyName - a NULL terminated string.
+ * @param[in] dataPtr - pointing to a valid BejJsonParam struct.
+ * @return 0 if successful.
+ */
+static int callbackAnnotation(const char* propertyName, void* dataPtr)
+{
+    struct BejJsonParam* params =
+        reinterpret_cast<struct BejJsonParam*>(dataPtr);
+    params->output->push_back('\"');
+    params->output->append(propertyName);
+
+    // bejPropertyAnnotation type has the form "Status@Message.ExtendedInfo".
+    // First the decoder will see "Status" part of the annotated property. This
+    // will be in its own SFLV tuple. The remainder of the property name,
+    // @Message.ExtendedInfo will be contained in the next bej SFLV tuple.
+    // Therefore to add the inverted commas to the complete property name,
+    // Status@Message.ExtendedInfo, we need to know that the previous property
+    // we processed is a start to an annotation property. We can use
+    // isPrevAnnotated to pass this information.
+    // Here we are adding: "propertyName
+    // If isPrevAnnotated is true, next property should add: propertyNameNext"
+    *params->isPrevAnnotated = true;
+    return 0;
+}
+
+/**
+ * @brief Callback for stackEmpty.
+ *
+ * @param[in] dataPtr - pointer to a valid std::vector<BejStackProperty>
+ * @return true if the stack is empty.
+ */
+static bool stackEmpty(void* dataPtr)
+{
+    std::vector<BejStackProperty>* stack =
+        reinterpret_cast<std::vector<BejStackProperty>*>(dataPtr);
+    return stack->empty();
+}
+
+/**
+ * @brief Callback for stackPeek.
+ *
+ * @param[in] dataPtr - pointer to a valid std::vector<BejStackProperty>
+ * @return a const reference to the stack top.
+ */
+static const struct BejStackProperty* stackPeek(void* dataPtr)
+{
+    std::vector<BejStackProperty>* stack =
+        reinterpret_cast<std::vector<BejStackProperty>*>(dataPtr);
+    if (stack->empty())
+    {
+        return nullptr;
+    }
+    return &(stack->back());
+}
+
+/**
+ * @brief Callback for stackPop. Remove the top element from the stack.
+ *
+ * @param[in] dataPtr - pointer to a valid std::vector<BejStackProperty>
+ */
+static void stackPop(void* dataPtr)
+{
+    std::vector<BejStackProperty>* stack =
+        reinterpret_cast<std::vector<BejStackProperty>*>(dataPtr);
+    if (stack->empty())
+    {
+        return;
+    }
+    stack->pop_back();
+}
+
+/**
+ * @brief Callback for stackPush. Push a new element to the top of the stack.
+ *
+ * @param[in] property - property to push.
+ * @param[in] dataPtr - pointer to a valid std::vector<BejStackProperty>
+ * @return 0 if successful.
+ */
+static int stackPush(const struct BejStackProperty* const property,
+                     void* dataPtr)
+{
+    std::vector<BejStackProperty>* stack =
+        reinterpret_cast<std::vector<BejStackProperty>*>(dataPtr);
+    stack->push_back(*property);
+    return 0;
+}
+
+int BejDecoderJson::decode(const BejDictionaries& dictionaries,
+                           const std::span<const uint8_t> encodedPldmBlock)
+{
+    // Clear the previous output if any.
+    output.clear();
+
+    // The dictionaries have to be traversed in a depth first manner. This is
+    // using a stack to implement it non-recursively. Going into a set or an
+    // array or a property annotation section means that we have to jump to the
+    // child dictionary offset start point but needs to retrieve the parent
+    // dictionary offset start once all the children are processed. This stack
+    // will hold the parent dictionary offsets and endings for each section.
+    stack.clear();
+
+    struct BejStackCallback stackCallback = {
+        .stackEmpty = stackEmpty,
+        .stackPeek = stackPeek,
+        .stackPop = stackPop,
+        .stackPush = stackPush,
+    };
+
+    struct BejDecodedCallback decodedCallback = {
+        .callbackSetStart = callbackSetStart,
+        .callbackSetEnd = callbackSetEnd,
+        .callbackArrayStart = callbackArrayStart,
+        .callbackArrayEnd = callbackArrayEnd,
+        .callbackPropertyEnd = callbackPropertyEnd,
+        .callbackNull = callbackNull,
+        .callbackInteger = callbackInteger,
+        .callbackEnum = callbackEnum,
+        .callbackString = callbackString,
+        .callbackReal = callbackReal,
+        .callbackBool = callbackBool,
+        .callbackAnnotation = callbackAnnotation,
+        .callbackReadonlyProperty = nullptr,
+    };
+
+    isPrevAnnotated = false;
+    struct BejJsonParam callbackData = {
+        .isPrevAnnotated = &isPrevAnnotated,
+        .output = &output,
+    };
+
+    return bejDecodePldmBlock(&dictionaries, encodedPldmBlock.data(),
+                              encodedPldmBlock.size_bytes(), &stackCallback,
+                              &decodedCallback, (void*)(&callbackData),
+                              (void*)(&stack));
+}
+
+std::string BejDecoderJson::getOutput()
+{
+    return output;
+}
+
+} // namespace libbej