diff --git a/Userland/DevTools/Profiler/DisassemblyModel.cpp b/Userland/DevTools/Profiler/DisassemblyModel.cpp
index 9225df52aa..9a6f6bfdeb 100644
--- a/Userland/DevTools/Profiler/DisassemblyModel.cpp
+++ b/Userland/DevTools/Profiler/DisassemblyModel.cpp
@@ -14,6 +14,8 @@
 #include <ctype.h>
 #include <stdio.h>
 
+namespace Profiler {
+
 static const Gfx::Bitmap& heat_gradient()
 {
     static RefPtr<Gfx::Bitmap> bitmap;
@@ -185,3 +187,5 @@ void DisassemblyModel::update()
 {
     did_update();
 }
+
+}
diff --git a/Userland/DevTools/Profiler/DisassemblyModel.h b/Userland/DevTools/Profiler/DisassemblyModel.h
index 382c384fde..6982d03d9f 100644
--- a/Userland/DevTools/Profiler/DisassemblyModel.h
+++ b/Userland/DevTools/Profiler/DisassemblyModel.h
@@ -9,6 +9,8 @@
 #include <LibGUI/Model.h>
 #include <LibX86/Instruction.h>
 
+namespace Profiler {
+
 class Profile;
 class ProfileNode;
 
@@ -53,3 +55,5 @@ private:
 
     Vector<InstructionData> m_instructions;
 };
+
+}
diff --git a/Userland/DevTools/Profiler/IndividualSampleModel.cpp b/Userland/DevTools/Profiler/IndividualSampleModel.cpp
index d3e7823d45..386d559910 100644
--- a/Userland/DevTools/Profiler/IndividualSampleModel.cpp
+++ b/Userland/DevTools/Profiler/IndividualSampleModel.cpp
@@ -9,6 +9,8 @@
 #include <AK/StringBuilder.h>
 #include <stdio.h>
 
+namespace Profiler {
+
 IndividualSampleModel::IndividualSampleModel(Profile& profile, size_t event_index)
     : m_profile(profile)
     , m_event_index(event_index)
@@ -69,3 +71,5 @@ void IndividualSampleModel::update()
 {
     did_update(Model::InvalidateAllIndices);
 }
+
+}
diff --git a/Userland/DevTools/Profiler/IndividualSampleModel.h b/Userland/DevTools/Profiler/IndividualSampleModel.h
index 7ff5dacd73..95abc2541f 100644
--- a/Userland/DevTools/Profiler/IndividualSampleModel.h
+++ b/Userland/DevTools/Profiler/IndividualSampleModel.h
@@ -8,6 +8,8 @@
 
 #include <LibGUI/Model.h>
 
+namespace Profiler {
+
 class Profile;
 
 class IndividualSampleModel final : public GUI::Model {
@@ -38,3 +40,5 @@ private:
     Profile& m_profile;
     const size_t m_event_index { 0 };
 };
+
+}
diff --git a/Userland/DevTools/Profiler/Process.cpp b/Userland/DevTools/Profiler/Process.cpp
index ac03c69a44..9eee7d6489 100644
--- a/Userland/DevTools/Profiler/Process.cpp
+++ b/Userland/DevTools/Profiler/Process.cpp
@@ -6,6 +6,8 @@
 
 #include "Process.h"
 
+namespace Profiler {
+
 Thread* Process::find_thread(pid_t tid, u64 timestamp)
 {
     auto it = threads.find(tid);
@@ -115,3 +117,5 @@ const LibraryMetadata::Library* LibraryMetadata::library_containing(FlatPtr ptr)
     }
     return nullptr;
 }
+
+}
diff --git a/Userland/DevTools/Profiler/Process.h b/Userland/DevTools/Profiler/Process.h
index 3e7c6b131b..b928d7bc23 100644
--- a/Userland/DevTools/Profiler/Process.h
+++ b/Userland/DevTools/Profiler/Process.h
@@ -12,6 +12,8 @@
 #include <AK/Vector.h>
 #include <LibELF/Image.h>
 
+namespace Profiler {
+
 struct MappedObject {
     NonnullRefPtr<MappedFile> file;
     ELF::Image elf;
@@ -66,3 +68,5 @@ struct Process {
         return timestamp >= start_valid && (end_valid == 0 || timestamp <= end_valid);
     }
 };
+
+}
diff --git a/Userland/DevTools/Profiler/ProcessPickerWidget.cpp b/Userland/DevTools/Profiler/ProcessPickerWidget.cpp
index ad78b1c989..2c34b149c8 100644
--- a/Userland/DevTools/Profiler/ProcessPickerWidget.cpp
+++ b/Userland/DevTools/Profiler/ProcessPickerWidget.cpp
@@ -10,6 +10,8 @@
 #include <LibGUI/ItemListModel.h>
 #include <LibGUI/Label.h>
 
+namespace Profiler {
+
 ProcessPickerWidget::ProcessPickerWidget(Profile& profile)
     : m_profile(profile)
 {
@@ -46,3 +48,5 @@ ProcessPickerWidget::ProcessPickerWidget(Profile& profile)
 ProcessPickerWidget::~ProcessPickerWidget()
 {
 }
+
+}
diff --git a/Userland/DevTools/Profiler/ProcessPickerWidget.h b/Userland/DevTools/Profiler/ProcessPickerWidget.h
index 85d8733a16..b1c64a374f 100644
--- a/Userland/DevTools/Profiler/ProcessPickerWidget.h
+++ b/Userland/DevTools/Profiler/ProcessPickerWidget.h
@@ -9,6 +9,8 @@
 #include <LibGUI/ComboBox.h>
 #include <LibGUI/Frame.h>
 
+namespace Profiler {
+
 class Profile;
 
 class ProcessPickerWidget final : public GUI::Frame {
@@ -29,3 +31,5 @@ private:
 
     RefPtr<GUI::ComboBox> m_process_combo;
 };
+
+}
diff --git a/Userland/DevTools/Profiler/Profile.cpp b/Userland/DevTools/Profiler/Profile.cpp
index 101f5ec598..76f3f8c764 100644
--- a/Userland/DevTools/Profiler/Profile.cpp
+++ b/Userland/DevTools/Profiler/Profile.cpp
@@ -18,6 +18,8 @@
 #include <LibELF/Image.h>
 #include <sys/stat.h>
 
+namespace Profiler {
+
 static void sort_profile_nodes(Vector<NonnullRefPtr<ProfileNode>>& nodes)
 {
     quick_sort(nodes.begin(), nodes.end(), [](auto& a, auto& b) {
@@ -459,3 +461,5 @@ const Process* ProfileNode::process(Profile& profile, u64 timestamp) const
 {
     return profile.find_process(m_pid, timestamp);
 }
+
+}
diff --git a/Userland/DevTools/Profiler/Profile.h b/Userland/DevTools/Profiler/Profile.h
index 661afd5c4b..64572d5b03 100644
--- a/Userland/DevTools/Profiler/Profile.h
+++ b/Userland/DevTools/Profiler/Profile.h
@@ -20,6 +20,8 @@
 #include <LibGUI/Forward.h>
 #include <LibGUI/ModelIndex.h>
 
+namespace Profiler {
+
 class DisassemblyModel;
 class Profile;
 class ProfileModel;
@@ -229,3 +231,5 @@ private:
     bool m_show_top_functions { false };
     bool m_show_percentages { false };
 };
+
+}
diff --git a/Userland/DevTools/Profiler/ProfileModel.cpp b/Userland/DevTools/Profiler/ProfileModel.cpp
index 2b77e38b75..f34f51722c 100644
--- a/Userland/DevTools/Profiler/ProfileModel.cpp
+++ b/Userland/DevTools/Profiler/ProfileModel.cpp
@@ -10,6 +10,8 @@
 #include <ctype.h>
 #include <stdio.h>
 
+namespace Profiler {
+
 ProfileModel::ProfileModel(Profile& profile)
     : m_profile(profile)
 {
@@ -129,3 +131,5 @@ void ProfileModel::update()
 {
     did_update(Model::InvalidateAllIndices);
 }
+
+}
diff --git a/Userland/DevTools/Profiler/ProfileModel.h b/Userland/DevTools/Profiler/ProfileModel.h
index b9612c2894..5678a077ca 100644
--- a/Userland/DevTools/Profiler/ProfileModel.h
+++ b/Userland/DevTools/Profiler/ProfileModel.h
@@ -8,6 +8,8 @@
 
 #include <LibGUI/Model.h>
 
+namespace Profiler {
+
 class Profile;
 
 class ProfileModel final : public GUI::Model {
@@ -44,3 +46,5 @@ private:
     GUI::Icon m_user_frame_icon;
     GUI::Icon m_kernel_frame_icon;
 };
+
+}
diff --git a/Userland/DevTools/Profiler/ProfileTimelineWidget.cpp b/Userland/DevTools/Profiler/ProfileTimelineWidget.cpp
index ebc532e908..748f7e197a 100644
--- a/Userland/DevTools/Profiler/ProfileTimelineWidget.cpp
+++ b/Userland/DevTools/Profiler/ProfileTimelineWidget.cpp
@@ -9,6 +9,8 @@
 #include <LibGUI/Painter.h>
 #include <LibGfx/Font.h>
 
+namespace Profiler {
+
 ProfileTimelineWidget::ProfileTimelineWidget(Profile& profile)
     : m_profile(profile)
 {
@@ -121,3 +123,5 @@ void ProfileTimelineWidget::mouseup_event(GUI::MouseEvent& event)
     if (m_select_start_time == m_select_end_time)
         m_profile.clear_timestamp_filter_range();
 }
+
+}
diff --git a/Userland/DevTools/Profiler/ProfileTimelineWidget.h b/Userland/DevTools/Profiler/ProfileTimelineWidget.h
index 92e5b914b9..66dfebaec1 100644
--- a/Userland/DevTools/Profiler/ProfileTimelineWidget.h
+++ b/Userland/DevTools/Profiler/ProfileTimelineWidget.h
@@ -8,6 +8,8 @@
 
 #include <LibGUI/Frame.h>
 
+namespace Profiler {
+
 class Profile;
 
 class ProfileTimelineWidget final : public GUI::Frame {
@@ -32,3 +34,5 @@ private:
     u64 m_select_end_time { 0 };
     u64 m_hover_time { 0 };
 };
+
+}
diff --git a/Userland/DevTools/Profiler/SamplesModel.cpp b/Userland/DevTools/Profiler/SamplesModel.cpp
index e4cae4ab1b..ce8161d343 100644
--- a/Userland/DevTools/Profiler/SamplesModel.cpp
+++ b/Userland/DevTools/Profiler/SamplesModel.cpp
@@ -9,6 +9,8 @@
 #include <AK/StringBuilder.h>
 #include <stdio.h>
 
+namespace Profiler {
+
 SamplesModel::SamplesModel(Profile& profile)
     : m_profile(profile)
 {
@@ -91,3 +93,5 @@ void SamplesModel::update()
 {
     did_update(Model::InvalidateAllIndices);
 }
+
+}
diff --git a/Userland/DevTools/Profiler/SamplesModel.h b/Userland/DevTools/Profiler/SamplesModel.h
index e2a643f2ff..3488f1fce8 100644
--- a/Userland/DevTools/Profiler/SamplesModel.h
+++ b/Userland/DevTools/Profiler/SamplesModel.h
@@ -8,6 +8,8 @@
 
 #include <LibGUI/Model.h>
 
+namespace Profiler {
+
 class Profile;
 
 class SamplesModel final : public GUI::Model {
@@ -43,3 +45,5 @@ private:
     GUI::Icon m_user_frame_icon;
     GUI::Icon m_kernel_frame_icon;
 };
+
+}
diff --git a/Userland/DevTools/Profiler/main.cpp b/Userland/DevTools/Profiler/main.cpp
index 219e929361..56a14d26a0 100644
--- a/Userland/DevTools/Profiler/main.cpp
+++ b/Userland/DevTools/Profiler/main.cpp
@@ -32,6 +32,8 @@
 #include <serenity.h>
 #include <string.h>
 
+using namespace Profiler;
+
 static bool generate_profile(pid_t& pid);
 
 int main(int argc, char** argv)