diff --git a/Libraries/LibWebView/Application.cpp b/Libraries/LibWebView/Application.cpp
index 83a0d8c4af5..576d8622a86 100644
--- a/Libraries/LibWebView/Application.cpp
+++ b/Libraries/LibWebView/Application.cpp
@@ -417,4 +417,20 @@ void Application::clear_highlighted_dom_node(DevTools::TabDescription const& des
         view->clear_highlighted_dom_node();
 }
 
+void Application::evaluate_javascript(DevTools::TabDescription const& description, String script, OnScriptEvaluationComplete on_complete) const
+{
+    auto view = ViewImplementation::find_view_by_id(description.id);
+    if (!view.has_value()) {
+        on_complete(Error::from_string_literal("Unable to locate tab"));
+        return;
+    }
+
+    view->on_received_js_console_result = [&view = *view, on_complete = move(on_complete)](JsonValue result) {
+        view.on_received_js_console_result = nullptr;
+        on_complete(move(result));
+    };
+
+    view->js_console_input(move(script));
+}
+
 }
diff --git a/Libraries/LibWebView/Application.h b/Libraries/LibWebView/Application.h
index a9c3cb05f84..c7972db5da1 100644
--- a/Libraries/LibWebView/Application.h
+++ b/Libraries/LibWebView/Application.h
@@ -96,6 +96,7 @@ private:
     virtual void clear_inspected_dom_node(DevTools::TabDescription const&) const override;
     virtual void highlight_dom_node(DevTools::TabDescription const&, Web::UniqueNodeID, Optional<Web::CSS::Selector::PseudoElement::Type>) const override;
     virtual void clear_highlighted_dom_node(DevTools::TabDescription const&) const override;
+    virtual void evaluate_javascript(DevTools::TabDescription const&, String, OnScriptEvaluationComplete) const override;
 
     static Application* s_the;
 
diff --git a/Libraries/LibWebView/ViewImplementation.h b/Libraries/LibWebView/ViewImplementation.h
index 1f1ee94724a..8fb77e9b3d4 100644
--- a/Libraries/LibWebView/ViewImplementation.h
+++ b/Libraries/LibWebView/ViewImplementation.h
@@ -215,6 +215,7 @@ public:
     Function<void(Web::UniqueNodeID)> on_received_hovered_node_id;
     Function<void(Optional<Web::UniqueNodeID> const& node_id)> on_finshed_editing_dom_node;
     Function<void(String const&)> on_received_dom_node_html;
+    Function<void(JsonValue)> on_received_js_console_result;
     Function<void(i32 message_id)> on_received_console_message;
     Function<void(i32 start_index, Vector<String> const& message_types, Vector<String> const& messages)> on_received_console_messages;
     Function<void(i32 count_waiting)> on_resource_status_change;
diff --git a/Libraries/LibWebView/WebContentClient.cpp b/Libraries/LibWebView/WebContentClient.cpp
index 4bef200e246..96a811f4663 100644
--- a/Libraries/LibWebView/WebContentClient.cpp
+++ b/Libraries/LibWebView/WebContentClient.cpp
@@ -366,6 +366,14 @@ void WebContentClient::did_get_internal_page_info(u64 page_id, WebView::PageInfo
         view->did_receive_internal_page_info({}, type, info);
 }
 
+void WebContentClient::did_execute_js_console_input(u64 page_id, JsonValue const& result)
+{
+    if (auto view = view_for_page_id(page_id); view.has_value()) {
+        if (view->on_received_js_console_result)
+            view->on_received_js_console_result(move(const_cast<JsonValue&>(result)));
+    }
+}
+
 void WebContentClient::did_output_js_console_message(u64 page_id, i32 message_index)
 {
     if (auto view = view_for_page_id(page_id); view.has_value()) {
diff --git a/Libraries/LibWebView/WebContentClient.h b/Libraries/LibWebView/WebContentClient.h
index e8971d02ec3..52d4b7e3b96 100644
--- a/Libraries/LibWebView/WebContentClient.h
+++ b/Libraries/LibWebView/WebContentClient.h
@@ -79,6 +79,7 @@ private:
     virtual void did_get_dom_node_html(u64 page_id, String const& html) override;
     virtual void did_take_screenshot(u64 page_id, Gfx::ShareableBitmap const& screenshot) override;
     virtual void did_get_internal_page_info(u64 page_id, PageInfoType, String const&) override;
+    virtual void did_execute_js_console_input(u64 page_id, JsonValue const&) override;
     virtual void did_output_js_console_message(u64 page_id, i32 message_index) override;
     virtual void did_get_js_console_messages(u64 page_id, i32 start_index, Vector<String> const& message_types, Vector<String> const& messages) override;
     virtual void did_change_favicon(u64 page_id, Gfx::ShareableBitmap const&) override;
diff --git a/Services/WebContent/CMakeLists.txt b/Services/WebContent/CMakeLists.txt
index 56ff5099031..9da574227e3 100644
--- a/Services/WebContent/CMakeLists.txt
+++ b/Services/WebContent/CMakeLists.txt
@@ -30,7 +30,7 @@ target_include_directories(webcontentservice PUBLIC $<BUILD_INTERFACE:${CMAKE_CU
 target_include_directories(webcontentservice PUBLIC $<BUILD_INTERFACE:${LADYBIRD_SOURCE_DIR}>)
 target_include_directories(webcontentservice PUBLIC $<BUILD_INTERFACE:${LADYBIRD_SOURCE_DIR}/Services/>)
 
-target_link_libraries(webcontentservice PUBLIC LibCore LibFileSystem LibGfx LibIPC LibJS LibMain LibMedia LibWeb LibWebSocket LibRequests LibWebView LibImageDecoderClient LibGC)
+target_link_libraries(webcontentservice PUBLIC LibCore LibCrypto LibFileSystem LibGfx LibIPC LibJS LibMain LibMedia LibWeb LibWebSocket LibRequests LibWebView LibImageDecoderClient LibGC)
 target_link_libraries(webcontentservice PRIVATE OpenSSL::Crypto OpenSSL::SSL)
 
 if (ENABLE_QT)
diff --git a/Services/WebContent/DevToolsConsoleClient.cpp b/Services/WebContent/DevToolsConsoleClient.cpp
index 64e15b33655..7bf1bf9c7e5 100644
--- a/Services/WebContent/DevToolsConsoleClient.cpp
+++ b/Services/WebContent/DevToolsConsoleClient.cpp
@@ -4,7 +4,13 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <AK/JsonObject.h>
+#include <AK/JsonValue.h>
+#include <AK/MemoryStream.h>
+#include <LibJS/Print.h>
+#include <LibJS/Runtime/BigInt.h>
 #include <LibJS/Runtime/Realm.h>
+#include <LibWeb/HTML/Scripting/TemporaryExecutionContext.h>
 #include <LibWeb/HTML/Window.h>
 #include <WebContent/ConsoleGlobalEnvironmentExtensions.h>
 #include <WebContent/DevToolsConsoleClient.h>
@@ -29,9 +35,67 @@ DevToolsConsoleClient::DevToolsConsoleClient(JS::Realm& realm, JS::Console& cons
 
 DevToolsConsoleClient::~DevToolsConsoleClient() = default;
 
+// https://firefox-source-docs.mozilla.org/devtools/backend/protocol.html#grips
+static JsonValue serialize_js_value(JS::Realm& realm, JS::Value value)
+{
+    auto& vm = realm.vm();
+
+    auto serialize_type = [](StringView type) {
+        JsonObject serialized;
+        serialized.set("type"sv, type);
+        return serialized;
+    };
+
+    if (value.is_undefined())
+        return serialize_type("undefined"sv);
+
+    if (value.is_null())
+        return serialize_type("null"sv);
+
+    if (value.is_boolean())
+        return value.as_bool();
+
+    if (value.is_string())
+        return value.as_string().utf8_string();
+
+    if (value.is_number()) {
+        if (value.is_nan())
+            return serialize_type("NaN"sv);
+        if (value.is_positive_infinity())
+            return serialize_type("Infinity"sv);
+        if (value.is_negative_infinity())
+            return serialize_type("-Infinity"sv);
+        if (value.is_negative_zero())
+            return serialize_type("-0"sv);
+        return value.as_double();
+    }
+
+    if (value.is_bigint()) {
+        auto serialized = serialize_type("BigInt"sv);
+        serialized.set("text"sv, MUST(value.as_bigint().big_integer().to_base(10)));
+        return serialized;
+    }
+
+    if (value.is_symbol())
+        return MUST(value.as_symbol().descriptive_string());
+
+    // FIXME: Handle serialization of object grips. For now, we stringify the object.
+    if (value.is_object()) {
+        Web::HTML::TemporaryExecutionContext execution_context { realm };
+        AllocatingMemoryStream stream;
+
+        JS::PrintContext context { vm, stream, true };
+        MUST(JS::print(value, context));
+
+        return MUST(String::from_stream(stream, stream.used_buffer_size()));
+    }
+
+    return {};
+}
+
 void DevToolsConsoleClient::handle_result(JS::Value result)
 {
-    (void)result;
+    m_client->did_execute_js_console_input(serialize_js_value(m_realm, result));
 }
 
 void DevToolsConsoleClient::report_exception(JS::Error const& exception, bool in_promise)
diff --git a/Services/WebContent/PageClient.cpp b/Services/WebContent/PageClient.cpp
index 1b07c89d235..d555a11442c 100644
--- a/Services/WebContent/PageClient.cpp
+++ b/Services/WebContent/PageClient.cpp
@@ -7,6 +7,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <AK/JsonValue.h>
 #include <LibGfx/ShareableBitmap.h>
 #include <LibJS/Console.h>
 #include <LibJS/Runtime/ConsoleObject.h>
@@ -750,6 +751,11 @@ void PageClient::initialize_js_console(Web::DOM::Document& document)
     document.set_console_client(console_client);
 }
 
+void PageClient::did_execute_js_console_input(JsonValue result)
+{
+    client().async_did_execute_js_console_input(m_id, move(result));
+}
+
 void PageClient::js_console_input(StringView js_source)
 {
     if (m_top_level_document_console_client)
diff --git a/Services/WebContent/PageClient.h b/Services/WebContent/PageClient.h
index 6e234060f3d..b6b201c5268 100644
--- a/Services/WebContent/PageClient.h
+++ b/Services/WebContent/PageClient.h
@@ -85,6 +85,7 @@ public:
 
     void initialize_js_console(Web::DOM::Document& document);
     void js_console_input(StringView js_source);
+    void did_execute_js_console_input(JsonValue);
     void run_javascript(StringView js_source);
     void js_console_request_messages(i32 start_index);
     void did_output_js_console_message(i32 message_index);
diff --git a/Services/WebContent/WebContentClient.ipc b/Services/WebContent/WebContentClient.ipc
index 9edb48a7ec3..d52fe567b66 100644
--- a/Services/WebContent/WebContentClient.ipc
+++ b/Services/WebContent/WebContentClient.ipc
@@ -91,6 +91,7 @@ endpoint WebContentClient
 
     did_change_audio_play_state(u64 page_id, Web::HTML::AudioPlayState play_state) =|
 
+    did_execute_js_console_input(u64 page_id, JsonValue result) =|
     did_output_js_console_message(u64 page_id, i32 message_index) =|
     did_get_js_console_messages(u64 page_id, i32 start_index, Vector<String> message_types, Vector<String> messages) =|