diff --git a/CMakeLists.txt b/CMakeLists.txt
index fc58679..0e24c2d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,5 +30,5 @@ add_executable(
     NBT/TagLong.cpp NBT/TagLong.h
     NBT/TagFloat.cpp NBT/TagFloat.h
     NBT/TagDouble.cpp NBT/TagDouble.h
-)
+    NBT/TagByteArray.cpp NBT/TagByteArray.h)
 target_link_libraries(NBTModifier Qt5::Widgets Qt5::Svg)
\ No newline at end of file
diff --git a/NBT/AbstractNamedTag.cpp b/NBT/AbstractNamedTag.cpp
index d1d923d..15daea9 100644
--- a/NBT/AbstractNamedTag.cpp
+++ b/NBT/AbstractNamedTag.cpp
@@ -5,7 +5,7 @@
 
 AbstractNamedTag::AbstractNamedTag(const quint8 id) : AbstractTag(id) {}
 
-const bool AbstractNamedTag::readFromData(QDataStream &data) {
+void AbstractNamedTag::readFromData(QDataStream &data) {
     quint16 size;
 
     data >> size;
@@ -13,17 +13,17 @@ const bool AbstractNamedTag::readFromData(QDataStream &data) {
 
     char *rawName = new char[size];
     if (data.readRawData(rawName, size) == -1) {
-        return false;
+        return;
     }
 
     m_name = QString::fromUtf8(rawName);
-    return readPayloadFromData(data);
+    readPayloadFromData(data);
 }
-const bool AbstractNamedTag::writeToData(QDataStream &data) const {
+void AbstractNamedTag::writeToData(QDataStream &data) const {
     const QByteArray rawName = m_name.toUtf8();
 
     data << qToBigEndian(rawName.size()) << rawName.constData();
-    return writePayloadToData(data);
+    writePayloadToData(data);
 }
 
 const QString &AbstractNamedTag::name() const {
diff --git a/NBT/AbstractNamedTag.h b/NBT/AbstractNamedTag.h
index 178b856..a03c4e7 100644
--- a/NBT/AbstractNamedTag.h
+++ b/NBT/AbstractNamedTag.h
@@ -23,8 +23,8 @@ public:
 protected:
     explicit AbstractNamedTag(const quint8 id);
 
-    virtual const bool readFromData(QDataStream &data) override;
-    virtual const bool writeToData(QDataStream &data) const override;
+    virtual void readFromData(QDataStream &data) override;
+    virtual void writeToData(QDataStream &data) const override;
 
     /**
      * Read a tag payload from a data stream
@@ -33,7 +33,7 @@ protected:
      *
      * @return True if read is success, otherwise false
      */
-    virtual const bool readPayloadFromData(QDataStream &data) = 0;
+    virtual void readPayloadFromData(QDataStream &data) = 0;
     /**
      * Write a tag payload to a data stream
      *
@@ -41,7 +41,7 @@ protected:
      *
      * @return True if write is success, otherwise false
      */
-    virtual const bool writePayloadToData(QDataStream &data) const = 0;
+    virtual void writePayloadToData(QDataStream &data) const = 0;
 
 private:
     /**
diff --git a/NBT/AbstractTag.cpp b/NBT/AbstractTag.cpp
index f700908..d0011d7 100644
--- a/NBT/AbstractTag.cpp
+++ b/NBT/AbstractTag.cpp
@@ -16,53 +16,52 @@ const quint8 AbstractTag::id() const {
     return m_id;
 }
 
-AbstractTag *AbstractTag::fromData(QDataStream &data, bool *ok) {
+const quint8 AbstractTag::extractId(const QByteArray &data) {
+    QDataStream stream(data);
+
     quint8 id;
-    data >> id;
+    stream >> id;
 
-    AbstractTag *tag = nullptr;
-    switch (id) {
+    return id;
+}
+AbstractTag *AbstractTag::extractEmptyTag(const QByteArray &data) {
+    switch (extractId(data)) {
         case TagEnd::ID:
-            tag = new TagEnd();
-            break;
+            return new TagEnd();
 
         case TagByte::ID:
-            tag = new TagByte();
-            break;
+            return new TagByte();
 
         case TagShort::ID:
-            tag = new TagShort();
-            break;
+            return new TagShort();
 
         case TagInt::ID:
-            tag = new TagInt();
-            break;
+            return new TagInt();
 
         case TagLong::ID:
-            tag = new TagLong();
-            break;
+            return new TagLong();
 
         case TagFloat::ID:
-            tag = new TagFloat();
-            break;
+            return new TagFloat();
 
         case TagDouble::ID:
-            tag = new TagDouble();
-            break;
-    }
-    if (tag == nullptr) {
-        return nullptr;
+            return new TagDouble();
     }
 
-    *ok = tag->readFromData(data);
-    return tag;
+    return nullptr;
 }
-QByteArray AbstractTag::toData(bool *ok) {
-    QByteArray data;
-    QDataStream stream(data);
 
-    stream << id();
-    *ok = writeToData(stream);
+QDataStream &operator<<(QDataStream &data, const AbstractTag &tag) {
+    data << tag.id();
+    tag.writeToData(data);
+
+    return data;
+}
+QDataStream &operator>>(QDataStream &data, AbstractTag &tag) {
+    quint8 id;
+    data >> id;
+
+    tag.readFromData(data);
 
     return data;
 }
\ No newline at end of file
diff --git a/NBT/AbstractTag.h b/NBT/AbstractTag.h
index 0836290..e57d1d8 100644
--- a/NBT/AbstractTag.h
+++ b/NBT/AbstractTag.h
@@ -12,8 +12,11 @@ class AbstractTag {
 public:
     const quint8 id() const;
 
-    static AbstractTag *fromData(QDataStream &data, bool *ok = nullptr);
-    QByteArray toData(bool *ok = nullptr);
+    static const quint8 extractId(const QByteArray &data);
+    static AbstractTag *extractEmptyTag(const QByteArray &data);
+
+    friend QDataStream &operator<<(QDataStream &data, const AbstractTag &tag);
+    friend QDataStream &operator>>(QDataStream &data, AbstractTag &tag);
 
 protected:
     /**
@@ -30,7 +33,7 @@ protected:
      *
      * @return True if read is success, otherwise false
      */
-    virtual const bool readFromData(QDataStream &data) = 0;
+    virtual void readFromData(QDataStream &data) = 0;
     /**
      * Write a tag to a data stream
      *
@@ -38,7 +41,7 @@ protected:
      *
      * @return True if write is success, otherwise false
      */
-    virtual const bool writeToData(QDataStream &data) const = 0;
+    virtual void writeToData(QDataStream &data) const = 0;
 
 private:
     /**
diff --git a/NBT/TagByte.cpp b/NBT/TagByte.cpp
index aa1743f..1f81b04 100644
--- a/NBT/TagByte.cpp
+++ b/NBT/TagByte.cpp
@@ -4,11 +4,9 @@
 
 TagByte::TagByte(const qint8 value) : AbstractNamedTag(ID), m_value(value) {}
 
-bool const TagByte::readPayloadFromData(QDataStream &data) {
+void TagByte::readPayloadFromData(QDataStream &data) {
     data >> m_value;
-    return true;
 }
-bool const TagByte::writePayloadToData(QDataStream &data) const {
+void TagByte::writePayloadToData(QDataStream &data) const {
     data << m_value;
-    return true;
 }
diff --git a/NBT/TagByte.h b/NBT/TagByte.h
index 1a4aa72..5b5e7f9 100644
--- a/NBT/TagByte.h
+++ b/NBT/TagByte.h
@@ -10,8 +10,8 @@ public:
     TagByte(const qint8 value = 0);
 
 protected:
-    virtual bool const readPayloadFromData(QDataStream &data) override;
-    virtual bool const writePayloadToData(QDataStream &data) const override;
+    virtual void readPayloadFromData(QDataStream &data) override;
+    virtual void writePayloadToData(QDataStream &data) const override;
 
 private:
     qint8 m_value;
diff --git a/NBT/TagByteArray.cpp b/NBT/TagByteArray.cpp
new file mode 100644
index 0000000..a8620fc
--- /dev/null
+++ b/NBT/TagByteArray.cpp
@@ -0,0 +1,28 @@
+#include "TagByteArray.h"
+
+#include "TagInt.h"
+
+#include <QtCore/QDataStream>
+
+TagByteArray::TagByteArray(const QList<TagByte> value) : AbstractNamedTag(ID), m_value(value) {}
+
+void TagByteArray::readPayloadFromData(QDataStream &data) {
+    TagInt size;
+    data >> size;
+
+    m_value.clear();
+    for(qint32 elem = 0; elem < size.value(); elem++) {
+        TagByte tag;
+        data >> tag;
+
+        m_value << tag;
+    }
+}
+void TagByteArray::writePayloadToData(QDataStream &data) const {
+    TagInt size(m_value.size());
+
+    data << size;
+    foreach(const TagByte tag, m_value) {
+        data << tag;
+    }
+}
\ No newline at end of file
diff --git a/NBT/TagByteArray.h b/NBT/TagByteArray.h
new file mode 100644
index 0000000..120b9d7
--- /dev/null
+++ b/NBT/TagByteArray.h
@@ -0,0 +1,23 @@
+#ifndef NBTMODIFIER_TAGBYTEARRAY_H
+#define NBTMODIFIER_TAGBYTEARRAY_H
+
+#include "AbstractNamedTag.h"
+#include "TagByte.h"
+
+#include <QtCore/QList>
+
+class TagByteArray : public AbstractNamedTag {
+public:
+    static constexpr quint8 ID = 7;
+
+    TagByteArray(const QList<TagByte> value = QList<TagByte>());
+
+protected:
+    virtual void readPayloadFromData(QDataStream &data) override;
+    virtual void writePayloadToData(QDataStream &data) const override;
+
+private:
+    QList<TagByte> m_value;
+};
+
+#endif //NBTMODIFIER_TAGBYTEARRAY_H
diff --git a/NBT/TagDouble.cpp b/NBT/TagDouble.cpp
index 2fb8514..c84ce7d 100644
--- a/NBT/TagDouble.cpp
+++ b/NBT/TagDouble.cpp
@@ -5,12 +5,10 @@
 
 TagDouble::TagDouble(const double value) : AbstractNamedTag(ID), m_value(value) {}
 
-bool const TagDouble::readPayloadFromData(QDataStream &data) {
+void TagDouble::readPayloadFromData(QDataStream &data) {
     data >> m_value;
     m_value = qFromBigEndian(m_value);
-    return true;
 }
-bool const TagDouble::writePayloadToData(QDataStream &data) const {
+void TagDouble::writePayloadToData(QDataStream &data) const {
     data << qToBigEndian(m_value);
-    return true;
 }
\ No newline at end of file
diff --git a/NBT/TagDouble.h b/NBT/TagDouble.h
index b95f749..a6a5182 100644
--- a/NBT/TagDouble.h
+++ b/NBT/TagDouble.h
@@ -10,8 +10,8 @@ public:
     TagDouble(const double value = 0);
 
 protected:
-    virtual bool const readPayloadFromData(QDataStream &data) override;
-    virtual bool const writePayloadToData(QDataStream &data) const override;
+    virtual void readPayloadFromData(QDataStream &data) override;
+    virtual void writePayloadToData(QDataStream &data) const override;
 
 private:
     double m_value;
diff --git a/NBT/TagEnd.cpp b/NBT/TagEnd.cpp
index 1d24e5d..1136a0a 100644
--- a/NBT/TagEnd.cpp
+++ b/NBT/TagEnd.cpp
@@ -3,9 +3,9 @@
 TagEnd::TagEnd() : AbstractTag(ID) {
 }
 
-bool const TagEnd::readFromData(QDataStream &data) {
-    return true;
+void TagEnd::readFromData(QDataStream &data) {
+
 }
-bool const TagEnd::writeToData(QDataStream &data) const {
-    return true;
+void TagEnd::writeToData(QDataStream &data) const {
+
 }
diff --git a/NBT/TagEnd.h b/NBT/TagEnd.h
index 18fa538..6803549 100644
--- a/NBT/TagEnd.h
+++ b/NBT/TagEnd.h
@@ -10,8 +10,8 @@ public:
     explicit TagEnd();
 
 protected:
-    virtual bool const readFromData(QDataStream &data) override;
-    virtual bool const writeToData(QDataStream &data) const override;
+    virtual void readFromData(QDataStream &data) override;
+    virtual void writeToData(QDataStream &data) const override;
 };
 
 #endif //NBTMODIFIER_TAGEND_H
diff --git a/NBT/TagFloat.cpp b/NBT/TagFloat.cpp
index ddc2c9b..a672746 100644
--- a/NBT/TagFloat.cpp
+++ b/NBT/TagFloat.cpp
@@ -5,12 +5,10 @@
 
 TagFloat::TagFloat(const float value) : AbstractNamedTag(ID), m_value(value) {}
 
-bool const TagFloat::readPayloadFromData(QDataStream &data) {
+void TagFloat::readPayloadFromData(QDataStream &data) {
     data >> m_value;
     m_value = qFromBigEndian(m_value);
-    return true;
 }
-bool const TagFloat::writePayloadToData(QDataStream &data) const {
+void TagFloat::writePayloadToData(QDataStream &data) const {
     data << qToBigEndian(m_value);
-    return true;
 }
\ No newline at end of file
diff --git a/NBT/TagFloat.h b/NBT/TagFloat.h
index c38e655..f63ec8e 100644
--- a/NBT/TagFloat.h
+++ b/NBT/TagFloat.h
@@ -11,8 +11,8 @@ public:
     TagFloat(const float value = 0);
 
 protected:
-    virtual bool const readPayloadFromData(QDataStream &data) override;
-    virtual bool const writePayloadToData(QDataStream &data) const override;
+    virtual void readPayloadFromData(QDataStream &data) override;
+    virtual void writePayloadToData(QDataStream &data) const override;
 
 private:
     float m_value;
diff --git a/NBT/TagInt.cpp b/NBT/TagInt.cpp
index e3f1a67..cfc689f 100644
--- a/NBT/TagInt.cpp
+++ b/NBT/TagInt.cpp
@@ -5,12 +5,14 @@
 
 TagInt::TagInt(const qint32 value) : AbstractNamedTag(ID), m_value(value) {}
 
-bool const TagInt::readPayloadFromData(QDataStream &data) {
+const qint32 TagInt::value() const {
+    return m_value;
+}
+
+void TagInt::readPayloadFromData(QDataStream &data) {
     data >> m_value;
     m_value = qFromBigEndian(m_value);
-    return true;
 }
-bool const TagInt::writePayloadToData(QDataStream &data) const {
+void TagInt::writePayloadToData(QDataStream &data) const {
     data << qToBigEndian(m_value);
-    return true;
 }
\ No newline at end of file
diff --git a/NBT/TagInt.h b/NBT/TagInt.h
index d524add..c204d4b 100644
--- a/NBT/TagInt.h
+++ b/NBT/TagInt.h
@@ -9,9 +9,11 @@ public:
 
     TagInt(const qint32 value = 0);
 
+    const qint32 value() const;
+
 protected:
-    virtual bool const readPayloadFromData(QDataStream &data) override;
-    virtual bool const writePayloadToData(QDataStream &data) const override;
+    virtual void readPayloadFromData(QDataStream &data) override;
+    virtual void writePayloadToData(QDataStream &data) const override;
 
 private:
     qint32 m_value;
diff --git a/NBT/TagLong.cpp b/NBT/TagLong.cpp
index 36b7741..b262418 100644
--- a/NBT/TagLong.cpp
+++ b/NBT/TagLong.cpp
@@ -5,12 +5,10 @@
 
 TagLong::TagLong(const qint64 value) : AbstractNamedTag(ID), m_value(value) {}
 
-bool const TagLong::readPayloadFromData(QDataStream &data) {
+void TagLong::readPayloadFromData(QDataStream &data) {
     data >> m_value;
     m_value = qFromBigEndian(m_value);
-    return true;
 }
-bool const TagLong::writePayloadToData(QDataStream &data) const {
+void TagLong::writePayloadToData(QDataStream &data) const {
     data << qToBigEndian(m_value);
-    return true;
 }
\ No newline at end of file
diff --git a/NBT/TagLong.h b/NBT/TagLong.h
index c0b3b17..936b25a 100644
--- a/NBT/TagLong.h
+++ b/NBT/TagLong.h
@@ -10,8 +10,8 @@ public:
     TagLong(const qint64 value = 0);
 
 protected:
-    virtual bool const readPayloadFromData(QDataStream &data) override;
-    virtual bool const writePayloadToData(QDataStream &data) const override;
+    virtual void readPayloadFromData(QDataStream &data) override;
+    virtual void writePayloadToData(QDataStream &data) const override;
 
 private:
     qint64 m_value;
diff --git a/NBT/TagShort.cpp b/NBT/TagShort.cpp
index 1b85073..0f9e0ea 100644
--- a/NBT/TagShort.cpp
+++ b/NBT/TagShort.cpp
@@ -5,12 +5,10 @@
 
 TagShort::TagShort(const qint16 value) : AbstractNamedTag(ID), m_value(value) {}
 
-bool const TagShort::readPayloadFromData(QDataStream &data) {
+void TagShort::readPayloadFromData(QDataStream &data) {
     data >> m_value;
     m_value = qFromBigEndian(m_value);
-    return true;
 }
-bool const TagShort::writePayloadToData(QDataStream &data) const {
+void TagShort::writePayloadToData(QDataStream &data) const {
     data << qToBigEndian(m_value);
-    return true;
 }
\ No newline at end of file
diff --git a/NBT/TagShort.h b/NBT/TagShort.h
index 46b6627..7c1f023 100644
--- a/NBT/TagShort.h
+++ b/NBT/TagShort.h
@@ -10,8 +10,8 @@ public:
     TagShort(const qint16 value = 0);
 
 protected:
-    virtual bool const readPayloadFromData(QDataStream &data) override;
-    virtual bool const writePayloadToData(QDataStream &data) const override;
+    virtual void readPayloadFromData(QDataStream &data) override;
+    virtual void writePayloadToData(QDataStream &data) const override;
 
 private:
     qint16 m_value;