diff --git a/AK/CMakeLists.txt b/AK/CMakeLists.txt
index cd2bcd0e02..4bb4aecaf9 100644
--- a/AK/CMakeLists.txt
+++ b/AK/CMakeLists.txt
@@ -10,6 +10,7 @@ set(AK_SOURCES
     FuzzyMatch.cpp
     GenericLexer.cpp
     Hex.cpp
+    JsonObject.cpp
     JsonParser.cpp
     JsonPath.cpp
     JsonValue.cpp
diff --git a/AK/JsonObject.cpp b/AK/JsonObject.cpp
new file mode 100644
index 0000000000..e55c2eea0d
--- /dev/null
+++ b/AK/JsonObject.cpp
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2021, Max Wipfli <mail@maxwipfli.ch>
+ * Copyright (c) 2023, Sam Atkins <atkinssj@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "JsonObject.h"
+
+namespace AK {
+
+JsonObject::JsonObject() = default;
+JsonObject::~JsonObject() = default;
+
+JsonObject::JsonObject(JsonObject const& other)
+    : m_members(other.m_members)
+{
+}
+
+JsonObject::JsonObject(JsonObject&& other)
+    : m_members(move(other.m_members))
+{
+}
+
+JsonObject& JsonObject::operator=(JsonObject const& other)
+{
+    if (this != &other)
+        m_members = other.m_members;
+    return *this;
+}
+
+JsonObject& JsonObject::operator=(JsonObject&& other)
+{
+    if (this != &other)
+        m_members = move(other.m_members);
+    return *this;
+}
+
+size_t JsonObject::size() const
+{
+    return m_members.size();
+}
+
+bool JsonObject::is_empty() const
+{
+    return m_members.is_empty();
+}
+
+JsonValue const& JsonObject::get_deprecated(StringView key) const
+{
+    auto const* value = get_ptr(key);
+    static JsonValue* s_null_value { nullptr };
+    if (!value) {
+        if (!s_null_value)
+            s_null_value = new JsonValue;
+        return *s_null_value;
+    }
+    return *value;
+}
+
+JsonValue const* JsonObject::get_ptr(StringView key) const
+{
+    auto it = m_members.find(key);
+    if (it == m_members.end())
+        return nullptr;
+    return &(*it).value;
+}
+
+bool JsonObject::has(StringView key) const
+{
+    return m_members.contains(key);
+}
+
+bool JsonObject::has_null(StringView key) const
+{
+    auto const* value = get_ptr(key);
+    return value && value->is_null();
+}
+
+bool JsonObject::has_bool(StringView key) const
+{
+    auto const* value = get_ptr(key);
+    return value && value->is_bool();
+}
+
+bool JsonObject::has_string(StringView key) const
+{
+    auto const* value = get_ptr(key);
+    return value && value->is_string();
+}
+
+bool JsonObject::has_i32(StringView key) const
+{
+    auto const* value = get_ptr(key);
+    return value && value->is_i32();
+}
+
+bool JsonObject::has_u32(StringView key) const
+{
+    auto const* value = get_ptr(key);
+    return value && value->is_u32();
+}
+
+bool JsonObject::has_i64(StringView key) const
+{
+    auto const* value = get_ptr(key);
+    return value && value->is_i64();
+}
+
+bool JsonObject::has_u64(StringView key) const
+{
+    auto const* value = get_ptr(key);
+    return value && value->is_u64();
+}
+
+bool JsonObject::has_number(StringView key) const
+{
+    auto const* value = get_ptr(key);
+    return value && value->is_number();
+}
+
+bool JsonObject::has_array(StringView key) const
+{
+    auto const* value = get_ptr(key);
+    return value && value->is_array();
+}
+
+bool JsonObject::has_object(StringView key) const
+{
+    auto const* value = get_ptr(key);
+    return value && value->is_object();
+}
+
+#ifndef KERNEL
+bool JsonObject::has_double(StringView key) const
+{
+    auto const* value = get_ptr(key);
+    return value && value->is_double();
+}
+#endif
+
+void JsonObject::set(DeprecatedString const& key, JsonValue value)
+{
+    m_members.set(key, move(value));
+}
+
+bool JsonObject::remove(StringView key)
+{
+    return m_members.remove(key);
+}
+
+DeprecatedString JsonObject::to_deprecated_string() const
+{
+    return serialized<StringBuilder>();
+}
+
+}
diff --git a/AK/JsonObject.h b/AK/JsonObject.h
index 836defad9e..7622a7b783 100644
--- a/AK/JsonObject.h
+++ b/AK/JsonObject.h
@@ -1,6 +1,7 @@
 /*
  * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
  * Copyright (c) 2021, Max Wipfli <mail@maxwipfli.ch>
+ * Copyright (c) 2023, Sam Atkins <atkinssj@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -22,123 +23,39 @@ class JsonObject {
     using CallbackErrorType = decltype(declval<Callback>()(declval<DeprecatedString const&>(), declval<JsonValue const&>()).release_error());
 
 public:
-    JsonObject() = default;
-    ~JsonObject() = default;
+    JsonObject();
+    ~JsonObject();
 
-    JsonObject(JsonObject const& other)
-        : m_members(other.m_members)
-    {
-    }
+    JsonObject(JsonObject const& other);
+    JsonObject(JsonObject&& other);
 
-    JsonObject(JsonObject&& other)
-        : m_members(move(other.m_members))
-    {
-    }
+    JsonObject& operator=(JsonObject const& other);
+    JsonObject& operator=(JsonObject&& other);
 
-    JsonObject& operator=(JsonObject const& other)
-    {
-        if (this != &other)
-            m_members = other.m_members;
-        return *this;
-    }
+    [[nodiscard]] size_t size() const;
+    [[nodiscard]] bool is_empty() const;
 
-    JsonObject& operator=(JsonObject&& other)
-    {
-        if (this != &other)
-            m_members = move(other.m_members);
-        return *this;
-    }
+    [[nodiscard]] JsonValue const& get_deprecated(StringView key) const;
 
-    [[nodiscard]] size_t size() const { return m_members.size(); }
-    [[nodiscard]] bool is_empty() const { return m_members.is_empty(); }
+    [[nodiscard]] JsonValue const* get_ptr(StringView key) const;
 
-    [[nodiscard]] JsonValue const& get_deprecated(StringView key) const
-    {
-        auto const* value = get_ptr(key);
-        static JsonValue* s_null_value { nullptr };
-        if (!value) {
-            if (!s_null_value)
-                s_null_value = new JsonValue;
-            return *s_null_value;
-        }
-        return *value;
-    }
+    [[nodiscard]] bool has(StringView key) const;
 
-    [[nodiscard]] JsonValue const* get_ptr(StringView key) const
-    {
-        auto it = m_members.find(key);
-        if (it == m_members.end())
-            return nullptr;
-        return &(*it).value;
-    }
-
-    [[nodiscard]] [[nodiscard]] bool has(StringView key) const
-    {
-        return m_members.contains(key);
-    }
-
-    [[nodiscard]] bool has_null(StringView key) const
-    {
-        auto const* value = get_ptr(key);
-        return value && value->is_null();
-    }
-    [[nodiscard]] bool has_bool(StringView key) const
-    {
-        auto const* value = get_ptr(key);
-        return value && value->is_bool();
-    }
-    [[nodiscard]] bool has_string(StringView key) const
-    {
-        auto const* value = get_ptr(key);
-        return value && value->is_string();
-    }
-    [[nodiscard]] bool has_i32(StringView key) const
-    {
-        auto const* value = get_ptr(key);
-        return value && value->is_i32();
-    }
-    [[nodiscard]] bool has_u32(StringView key) const
-    {
-        auto const* value = get_ptr(key);
-        return value && value->is_u32();
-    }
-    [[nodiscard]] bool has_i64(StringView key) const
-    {
-        auto const* value = get_ptr(key);
-        return value && value->is_i64();
-    }
-    [[nodiscard]] bool has_u64(StringView key) const
-    {
-        auto const* value = get_ptr(key);
-        return value && value->is_u64();
-    }
-    [[nodiscard]] bool has_number(StringView key) const
-    {
-        auto const* value = get_ptr(key);
-        return value && value->is_number();
-    }
-    [[nodiscard]] bool has_array(StringView key) const
-    {
-        auto const* value = get_ptr(key);
-        return value && value->is_array();
-    }
-    [[nodiscard]] bool has_object(StringView key) const
-    {
-        auto const* value = get_ptr(key);
-        return value && value->is_object();
-    }
+    [[nodiscard]] bool has_null(StringView key) const;
+    [[nodiscard]] bool has_bool(StringView key) const;
+    [[nodiscard]] bool has_string(StringView key) const;
+    [[nodiscard]] bool has_i32(StringView key) const;
+    [[nodiscard]] bool has_u32(StringView key) const;
+    [[nodiscard]] bool has_i64(StringView key) const;
+    [[nodiscard]] bool has_u64(StringView key) const;
+    [[nodiscard]] bool has_number(StringView key) const;
+    [[nodiscard]] bool has_array(StringView key) const;
+    [[nodiscard]] bool has_object(StringView key) const;
 #ifndef KERNEL
-    [[nodiscard]] [[nodiscard]] bool has_double(StringView key) const
-    {
-        auto const* value = get_ptr(key);
-        return value && value->is_double();
-    }
+    [[nodiscard]] bool has_double(StringView key) const;
 #endif
 
-    void set(DeprecatedString const& key, JsonValue value)
-    {
-        m_members.set(key, move(value));
-    }
+    void set(DeprecatedString const& key, JsonValue value);
 
     template<typename Callback>
     void for_each_member(Callback callback) const
@@ -155,10 +72,7 @@ public:
         return {};
     }
 
-    bool remove(StringView key)
-    {
-        return m_members.remove(key);
-    }
+    bool remove(StringView key);
 
     template<typename Builder>
     typename Builder::OutputType serialized() const;
@@ -166,7 +80,7 @@ public:
     template<typename Builder>
     void serialize(Builder&) const;
 
-    [[nodiscard]] DeprecatedString to_deprecated_string() const { return serialized<StringBuilder>(); }
+    [[nodiscard]] DeprecatedString to_deprecated_string() const;
 
 private:
     OrderedHashMap<DeprecatedString, JsonValue> m_members;