diff --git a/src/Tools/ArchiveNameFromVersionHeader.py b/src/Tools/ArchiveNameFromVersionHeader.py
index 3232978cf6..160ed48f6f 100644
--- a/src/Tools/ArchiveNameFromVersionHeader.py
+++ b/src/Tools/ArchiveNameFromVersionHeader.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 ###
 #  A convenience script to generate a deployment archive name of the form
 #  FreeCAD_{Major Version Number}.{Minor Version Number}-{Git Revision Count}.{Git Short SHA}-{OS}-{Arch}
diff --git a/src/Tools/FCFileTools.py b/src/Tools/FCFileTools.py
index 2d5e061452..a5e9afcf94 100644
--- a/src/Tools/FCFileTools.py
+++ b/src/Tools/FCFileTools.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # shell and operating system
 import os, sys, re
 
diff --git a/src/Tools/LicenseChecker.py b/src/Tools/LicenseChecker.py
index 1046d01005..8441cbee50 100644
--- a/src/Tools/LicenseChecker.py
+++ b/src/Tools/LicenseChecker.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2013 Werner Mayer LGPL
 #
 # Utility to search for source, header and Python files with a missing license text
diff --git a/src/Tools/MakeApp.py b/src/Tools/MakeApp.py
index bd13753d87..d92b14a8a1 100644
--- a/src/Tools/MakeApp.py
+++ b/src/Tools/MakeApp.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2003 Werner Mayer LGPL
 # Create a new application module
 
diff --git a/src/Tools/MakeAppTools.py b/src/Tools/MakeAppTools.py
index 8f55c39808..14327e5af3 100644
--- a/src/Tools/MakeAppTools.py
+++ b/src/Tools/MakeAppTools.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 import os, sys, re, FCFileTools
 
 verbose = 0
diff --git a/src/Tools/MakeMacBundleRelocatable.py b/src/Tools/MakeMacBundleRelocatable.py
index 59ab6a5107..5765d125aa 100755
--- a/src/Tools/MakeMacBundleRelocatable.py
+++ b/src/Tools/MakeMacBundleRelocatable.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 import os
 import sys
 from subprocess import check_call, check_output
diff --git a/src/Tools/MakeNewBuildNbr.py b/src/Tools/MakeNewBuildNbr.py
index 6a8a4ed820..f7d5024744 100644
--- a/src/Tools/MakeNewBuildNbr.py
+++ b/src/Tools/MakeNewBuildNbr.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # ***************************************************************************
 # *   Copyright (c) 2002 Jürgen Riegel <juergen.riegel@web.de>              *
 # *                                                                         *
diff --git a/src/Tools/PythonToCPP.py b/src/Tools/PythonToCPP.py
index 99a39b7de4..55800720b2 100644
--- a/src/Tools/PythonToCPP.py
+++ b/src/Tools/PythonToCPP.py
@@ -1,4 +1,6 @@
 #!/usr/bin/python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2004 Werner Mayer LGPL
 
 import os, sys
diff --git a/src/Tools/SubWCRev.py b/src/Tools/SubWCRev.py
index f52db8297a..3e75e8efee 100644
--- a/src/Tools/SubWCRev.py
+++ b/src/Tools/SubWCRev.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2006 Werner Mayer LGPL
 #
 # FreeCAD RevInfo script to get the revision information from Subversion, Bazaar, and Git.
diff --git a/src/Tools/ThumbnailProvider/CMakeLists.txt b/src/Tools/ThumbnailProvider/CMakeLists.txt
index 09ce8be1a9..e8cbef0a72 100644
--- a/src/Tools/ThumbnailProvider/CMakeLists.txt
+++ b/src/Tools/ThumbnailProvider/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 project(ThumbnailProvider)
 
 cmake_minimum_required(VERSION 2.6.0 FATAL_ERROR)
diff --git a/src/Tools/ThumbnailProvider/ClassFactory.cpp b/src/Tools/ThumbnailProvider/ClassFactory.cpp
index 05532450b1..3a3790aa65 100644
--- a/src/Tools/ThumbnailProvider/ClassFactory.cpp
+++ b/src/Tools/ThumbnailProvider/ClassFactory.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) 2011 Werner Mayer <wmayer@users.sourceforge.net>        *
  *                                                                         *
diff --git a/src/Tools/ThumbnailProvider/ClassFactory.h b/src/Tools/ThumbnailProvider/ClassFactory.h
index bad0928322..41e9d8cbd0 100644
--- a/src/Tools/ThumbnailProvider/ClassFactory.h
+++ b/src/Tools/ThumbnailProvider/ClassFactory.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) 2011 Werner Mayer <wmayer@users.sourceforge.net>        *
  *                                                                         *
diff --git a/src/Tools/ThumbnailProvider/Common.h b/src/Tools/ThumbnailProvider/Common.h
index b766f9daff..e3c4c5c306 100644
--- a/src/Tools/ThumbnailProvider/Common.h
+++ b/src/Tools/ThumbnailProvider/Common.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) 2011 Werner Mayer <wmayer@users.sourceforge.net>        *
  *                                                                         *
diff --git a/src/Tools/ThumbnailProvider/FCConfig.h b/src/Tools/ThumbnailProvider/FCConfig.h
index 91723c4bcf..0239575e0c 100644
--- a/src/Tools/ThumbnailProvider/FCConfig.h
+++ b/src/Tools/ThumbnailProvider/FCConfig.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) 2004 Jürgen Riegel <juergen.riegel@web.de>              *
  *                                                                         *
diff --git a/src/Tools/ThumbnailProvider/Main.cpp b/src/Tools/ThumbnailProvider/Main.cpp
index 3c6f03c275..154027edcd 100644
--- a/src/Tools/ThumbnailProvider/Main.cpp
+++ b/src/Tools/ThumbnailProvider/Main.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) 2011 Werner Mayer <wmayer@users.sourceforge.net>        *
  *                                                                         *
diff --git a/src/Tools/ThumbnailProvider/ThumbnailProvider.cpp b/src/Tools/ThumbnailProvider/ThumbnailProvider.cpp
index 7a48e06a5f..4d0314f8c2 100644
--- a/src/Tools/ThumbnailProvider/ThumbnailProvider.cpp
+++ b/src/Tools/ThumbnailProvider/ThumbnailProvider.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) 2011 Werner Mayer <wmayer@users.sourceforge.net>        *
  *                                                                         *
diff --git a/src/Tools/ThumbnailProvider/ThumbnailProvider.h b/src/Tools/ThumbnailProvider/ThumbnailProvider.h
index 632f3eda6f..f977ab3c69 100644
--- a/src/Tools/ThumbnailProvider/ThumbnailProvider.h
+++ b/src/Tools/ThumbnailProvider/ThumbnailProvider.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) 2011 Werner Mayer <wmayer@users.sourceforge.net>        *
  *                                                                         *
diff --git a/src/Tools/_TEMPLATEPY_/CMakeLists.txt b/src/Tools/_TEMPLATEPY_/CMakeLists.txt
index b64e5a0ede..d794cc9084 100644
--- a/src/Tools/_TEMPLATEPY_/CMakeLists.txt
+++ b/src/Tools/_TEMPLATEPY_/CMakeLists.txt
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 IF (BUILD_GUI)
     PYSIDE_WRAP_RC(_TEMPLATEPY__QRC_SRCS Resources/_TEMPLATEPY_.qrc)
diff --git a/src/Tools/_TEMPLATEPY_/Init.py b/src/Tools/_TEMPLATEPY_/Init.py
index b637b7b96e..98776aec07 100644
--- a/src/Tools/_TEMPLATEPY_/Init.py
+++ b/src/Tools/_TEMPLATEPY_/Init.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # FreeCAD init script of the _TEMPLATEPY_ module
 # (c) 2001 Juergen Riegel
 # License LGPL
diff --git a/src/Tools/_TEMPLATEPY_/InitGui.py b/src/Tools/_TEMPLATEPY_/InitGui.py
index e9af95ce9e..266ae13415 100644
--- a/src/Tools/_TEMPLATEPY_/InitGui.py
+++ b/src/Tools/_TEMPLATEPY_/InitGui.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # _TEMPLATEPY_ gui init module
 # (c) 2001 Juergen Riegel
 # License LGPL
diff --git a/src/Tools/_TEMPLATEPY_/_TEMPLATEPY_.py b/src/Tools/_TEMPLATEPY_/_TEMPLATEPY_.py
index e69de29bb2..bd4fba4dfe 100644
--- a/src/Tools/_TEMPLATEPY_/_TEMPLATEPY_.py
+++ b/src/Tools/_TEMPLATEPY_/_TEMPLATEPY_.py
@@ -0,0 +1 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
diff --git a/src/Tools/_TEMPLATEPY_/_TEMPLATEPY_Gui.py b/src/Tools/_TEMPLATEPY_/_TEMPLATEPY_Gui.py
index 3b39eff771..23abd7cb5c 100644
--- a/src/Tools/_TEMPLATEPY_/_TEMPLATEPY_Gui.py
+++ b/src/Tools/_TEMPLATEPY_/_TEMPLATEPY_Gui.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # FreeCAD tools of the _TEMPLATEPY_ workbench
 # (c) 2001 Juergen Riegel
 # License LGPL
diff --git a/src/Tools/_TEMPLATE_/App/App_TEMPLATE_.cpp b/src/Tools/_TEMPLATE_/App/App_TEMPLATE_.cpp
index 11f7bd5634..b0c6f619a1 100644
--- a/src/Tools/_TEMPLATE_/App/App_TEMPLATE_.cpp
+++ b/src/Tools/_TEMPLATE_/App/App_TEMPLATE_.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) YEAR YOUR NAME <Your e-mail address>                    *
  *                                                                         *
diff --git a/src/Tools/_TEMPLATE_/App/CMakeLists.txt b/src/Tools/_TEMPLATE_/App/CMakeLists.txt
index e8c7bf776f..b1cfbe7b3c 100644
--- a/src/Tools/_TEMPLATE_/App/CMakeLists.txt
+++ b/src/Tools/_TEMPLATE_/App/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 set(_TEMPLATE__LIBS
     FreeCADApp
 )
diff --git a/src/Tools/_TEMPLATE_/App/PreCompiled.h b/src/Tools/_TEMPLATE_/App/PreCompiled.h
index 833f94ecb2..a606f896f6 100644
--- a/src/Tools/_TEMPLATE_/App/PreCompiled.h
+++ b/src/Tools/_TEMPLATE_/App/PreCompiled.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) YEAR YOUR NAME <Your e-mail address>                    *
  *                                                                         *
diff --git a/src/Tools/_TEMPLATE_/CMakeLists.txt b/src/Tools/_TEMPLATE_/CMakeLists.txt
index b797a29a72..9ee90849ca 100644
--- a/src/Tools/_TEMPLATE_/CMakeLists.txt
+++ b/src/Tools/_TEMPLATE_/CMakeLists.txt
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 add_subdirectory(App)
 if(BUILD_GUI)
diff --git a/src/Tools/_TEMPLATE_/Gui/App_TEMPLATE_Gui.cpp b/src/Tools/_TEMPLATE_/Gui/App_TEMPLATE_Gui.cpp
index 229417fb84..c441b97b7c 100644
--- a/src/Tools/_TEMPLATE_/Gui/App_TEMPLATE_Gui.cpp
+++ b/src/Tools/_TEMPLATE_/Gui/App_TEMPLATE_Gui.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) YEAR YOUR NAME <Your e-mail address>                    *
  *                                                                         *
diff --git a/src/Tools/_TEMPLATE_/Gui/CMakeLists.txt b/src/Tools/_TEMPLATE_/Gui/CMakeLists.txt
index 6dad95a5df..851c4d35b6 100644
--- a/src/Tools/_TEMPLATE_/Gui/CMakeLists.txt
+++ b/src/Tools/_TEMPLATE_/Gui/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 include_directories(
     ${CMAKE_SOURCE_DIR}/src
     ${CMAKE_CURRENT_BINARY_DIR}
diff --git a/src/Tools/_TEMPLATE_/Gui/Command.cpp b/src/Tools/_TEMPLATE_/Gui/Command.cpp
index d5bf6eab5d..87ade5a73f 100644
--- a/src/Tools/_TEMPLATE_/Gui/Command.cpp
+++ b/src/Tools/_TEMPLATE_/Gui/Command.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) YEAR YOUR NAME <Your e-mail address>                    *
  *                                                                         *
diff --git a/src/Tools/_TEMPLATE_/Gui/PreCompiled.h b/src/Tools/_TEMPLATE_/Gui/PreCompiled.h
index 258c7f83c7..e6264c6fc9 100644
--- a/src/Tools/_TEMPLATE_/Gui/PreCompiled.h
+++ b/src/Tools/_TEMPLATE_/Gui/PreCompiled.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) YEAR YOUR NAME <Your e-mail address>                    *
  *                                                                         *
diff --git a/src/Tools/_TEMPLATE_/Gui/Workbench.cpp b/src/Tools/_TEMPLATE_/Gui/Workbench.cpp
index 529435aa32..cd7d721bc3 100644
--- a/src/Tools/_TEMPLATE_/Gui/Workbench.cpp
+++ b/src/Tools/_TEMPLATE_/Gui/Workbench.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) YEAR YOUR NAME <Your e-mail address>                    *
  *                                                                         *
diff --git a/src/Tools/_TEMPLATE_/Gui/Workbench.h b/src/Tools/_TEMPLATE_/Gui/Workbench.h
index 962f792939..8d2694c093 100644
--- a/src/Tools/_TEMPLATE_/Gui/Workbench.h
+++ b/src/Tools/_TEMPLATE_/Gui/Workbench.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) YEAR YOUR NAME <Your e-mail address>                    *
  *                                                                         *
diff --git a/src/Tools/_TEMPLATE_/Init.py b/src/Tools/_TEMPLATE_/Init.py
index 5d183c27dd..9ab3ed8ab1 100644
--- a/src/Tools/_TEMPLATE_/Init.py
+++ b/src/Tools/_TEMPLATE_/Init.py
@@ -1,2 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # FreeCAD init script of the _TEMPLATE_ module
 # (c) 2001 Juergen Riegel LGPL
diff --git a/src/Tools/_TEMPLATE_/InitGui.py b/src/Tools/_TEMPLATE_/InitGui.py
index b1f37f69ef..23fa825e24 100644
--- a/src/Tools/_TEMPLATE_/InitGui.py
+++ b/src/Tools/_TEMPLATE_/InitGui.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # _TEMPLATE_ gui init module
 # (c) 2001 Juergen Riegel LGPL
 
diff --git a/src/Tools/_TEMPLATE_/_TEMPLATE_Global.h b/src/Tools/_TEMPLATE_/_TEMPLATE_Global.h
index bab8d7defa..5d5e24fbfd 100644
--- a/src/Tools/_TEMPLATE_/_TEMPLATE_Global.h
+++ b/src/Tools/_TEMPLATE_/_TEMPLATE_Global.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) 2022 Werner Mayer <wmayer[at]users.sourceforge.net>     *
  *                                                                         *
diff --git a/src/Tools/bindings/generate.py b/src/Tools/bindings/generate.py
index 8af261e6b8..873e07bc0e 100644
--- a/src/Tools/bindings/generate.py
+++ b/src/Tools/bindings/generate.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2006 Jürgen Riegel  GPL
 
 import os
diff --git a/src/Tools/bindings/model/__init__.py b/src/Tools/bindings/model/__init__.py
index e69de29bb2..bd4fba4dfe 100644
--- a/src/Tools/bindings/model/__init__.py
+++ b/src/Tools/bindings/model/__init__.py
@@ -0,0 +1 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
diff --git a/src/Tools/bindings/model/generateDS.py b/src/Tools/bindings/model/generateDS.py
index 2124a8176d..df0143e86f 100644
--- a/src/Tools/bindings/model/generateDS.py
+++ b/src/Tools/bindings/model/generateDS.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+# SPDX-License-Identifier: MIT
 
 ## LICENSE
 
diff --git a/src/Tools/bindings/model/generateModel_Module.py b/src/Tools/bindings/model/generateModel_Module.py
index 8dbc66eec2..534f3cab3b 100644
--- a/src/Tools/bindings/model/generateModel_Module.py
+++ b/src/Tools/bindings/model/generateModel_Module.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 #
 # Generated Wed Sep 27 11:00:46 2023 by generateDS.py.
diff --git a/src/Tools/bindings/model/generateModel_Python.py b/src/Tools/bindings/model/generateModel_Python.py
index b48e0d5883..1782ffbcc3 100644
--- a/src/Tools/bindings/model/generateModel_Python.py
+++ b/src/Tools/bindings/model/generateModel_Python.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 """Parses Python binding interface files into a typed AST model."""
 
 import ast, re
diff --git a/src/Tools/bindings/model/generateTools.py b/src/Tools/bindings/model/generateTools.py
index ecc6150c01..b3a820d47f 100644
--- a/src/Tools/bindings/model/generateTools.py
+++ b/src/Tools/bindings/model/generateTools.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2007 Jürgen Riegel
 
 import os
diff --git a/src/Tools/bindings/model/typedModel.py b/src/Tools/bindings/model/typedModel.py
index a3d34b3033..7c60385fe5 100644
--- a/src/Tools/bindings/model/typedModel.py
+++ b/src/Tools/bindings/model/typedModel.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 from __future__ import annotations
 from dataclasses import dataclass, field
 from enum import Enum
diff --git a/src/Tools/bindings/templates/template.py b/src/Tools/bindings/templates/template.py
index 020dbda394..4ea6e1290e 100644
--- a/src/Tools/bindings/templates/template.py
+++ b/src/Tools/bindings/templates/template.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2006 Juergen Riegel
 
 
diff --git a/src/Tools/bindings/templates/templateCPPFile.py b/src/Tools/bindings/templates/templateCPPFile.py
index c970aadeee..784c80db77 100644
--- a/src/Tools/bindings/templates/templateCPPFile.py
+++ b/src/Tools/bindings/templates/templateCPPFile.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2006 Juergen Riegel
 
 import template
diff --git a/src/Tools/bindings/templates/templateClassPyExport.py b/src/Tools/bindings/templates/templateClassPyExport.py
index 588a11321b..36c57d1a20 100644
--- a/src/Tools/bindings/templates/templateClassPyExport.py
+++ b/src/Tools/bindings/templates/templateClassPyExport.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2006 Juergen Riegel
 
 
diff --git a/src/Tools/bindings/templates/templateModule.py b/src/Tools/bindings/templates/templateModule.py
index a336b92ca9..540b1013e3 100644
--- a/src/Tools/bindings/templates/templateModule.py
+++ b/src/Tools/bindings/templates/templateModule.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2006 Juergen Riegel
 
 from . import template, templateModuleApp
diff --git a/src/Tools/bindings/templates/templateModuleApp.py b/src/Tools/bindings/templates/templateModuleApp.py
index a906310119..b0517c8515 100644
--- a/src/Tools/bindings/templates/templateModuleApp.py
+++ b/src/Tools/bindings/templates/templateModuleApp.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2007 Juergen Riegel
 
 from . import template, templateModuleAppMain, templateModuleAppFeature
diff --git a/src/Tools/bindings/templates/templateModuleAppFeature.py b/src/Tools/bindings/templates/templateModuleAppFeature.py
index 169e761e22..e2b5e39fbc 100644
--- a/src/Tools/bindings/templates/templateModuleAppFeature.py
+++ b/src/Tools/bindings/templates/templateModuleAppFeature.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2006 Juergen Riegel
 
 from . import template
diff --git a/src/Tools/bindings/templates/templateModuleAppMain.py b/src/Tools/bindings/templates/templateModuleAppMain.py
index ff1ae419b7..830fa8707c 100644
--- a/src/Tools/bindings/templates/templateModuleAppMain.py
+++ b/src/Tools/bindings/templates/templateModuleAppMain.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2006 Juergen Riegel
 
 from . import template
diff --git a/src/Tools/catfiles.py b/src/Tools/catfiles.py
index cf6b313935..e73ffa55e5 100644
--- a/src/Tools/catfiles.py
+++ b/src/Tools/catfiles.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2018 Werner Mayer LGPL
 #
 
diff --git a/src/Tools/dir2qrc.py b/src/Tools/dir2qrc.py
index 46c0dc6483..25c9c0201c 100644
--- a/src/Tools/dir2qrc.py
+++ b/src/Tools/dir2qrc.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2007 Juergen Riegel GPL
 
 Usage = """dir2qrc - merging all files in a directory in a qrc file
diff --git a/src/Tools/dmg_settings.py b/src/Tools/dmg_settings.py
index 5be8ee57b3..b960b1bec4 100644
--- a/src/Tools/dmg_settings.py
+++ b/src/Tools/dmg_settings.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 files = [f"{containing_folder}/FreeCAD.app"]
 symlinks = {"Applications": "/Applications"}
 badge_icon = f"{containing_folder}/FreeCAD.app/Contents/Resources/freecad.icns"
diff --git a/src/Tools/doctools.py b/src/Tools/doctools.py
index 99b2c3bfb1..becb1376c7 100644
--- a/src/Tools/doctools.py
+++ b/src/Tools/doctools.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2010 Werner Mayer LGPL
 # FreeCAD Python script to work with the FCStd file format.
 
diff --git a/src/Tools/embedded/PySide/mainwindow.py b/src/Tools/embedded/PySide/mainwindow.py
index 9503a53c79..b664dc4ec6 100644
--- a/src/Tools/embedded/PySide/mainwindow.py
+++ b/src/Tools/embedded/PySide/mainwindow.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 import sys
 
 # sys.path.append("")
diff --git a/src/Tools/embedded/PySide/mainwindow2.py b/src/Tools/embedded/PySide/mainwindow2.py
index 907a38d7ea..8d99ecb1c6 100644
--- a/src/Tools/embedded/PySide/mainwindow2.py
+++ b/src/Tools/embedded/PySide/mainwindow2.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 import sys
 
 # sys.path.append("")
diff --git a/src/Tools/embedded/PySide/mainwindow3.py b/src/Tools/embedded/PySide/mainwindow3.py
index dc414e9eb0..e023b73fc3 100644
--- a/src/Tools/embedded/PySide/mainwindow3.py
+++ b/src/Tools/embedded/PySide/mainwindow3.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 import sys
 
 # sys.path.append("")
diff --git a/src/Tools/embedded/PySide/minimal.py b/src/Tools/embedded/PySide/minimal.py
index d612f5d57c..82fee17193 100644
--- a/src/Tools/embedded/PySide/minimal.py
+++ b/src/Tools/embedded/PySide/minimal.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 import sys
 from PySide2 import QtWidgets
 import FreeCADGui
diff --git a/src/Tools/embedded/PySide/ui_mainwindow.py b/src/Tools/embedded/PySide/ui_mainwindow.py
index 1ef8bbcf56..3285e80aed 100644
--- a/src/Tools/embedded/PySide/ui_mainwindow.py
+++ b/src/Tools/embedded/PySide/ui_mainwindow.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # Form implementation generated from reading ui file 'mainwindow.ui'
 #
 # Created: Fri Nov 20 18:03:04 2015
diff --git a/src/Tools/embedded/Qt/Qt.pro b/src/Tools/embedded/Qt/Qt.pro
index 8d1f508e07..9dfb8c4006 100644
--- a/src/Tools/embedded/Qt/Qt.pro
+++ b/src/Tools/embedded/Qt/Qt.pro
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 TEMPLATE = app
 TARGET = Qt
diff --git a/src/Tools/embedded/Qt/cxx/CMakeLists.txt b/src/Tools/embedded/Qt/cxx/CMakeLists.txt
index ad7aa735a3..ca3c914209 100644
--- a/src/Tools/embedded/Qt/cxx/CMakeLists.txt
+++ b/src/Tools/embedded/Qt/cxx/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 project(MyPlugin)
 cmake_minimum_required(VERSION 3.5)
 
diff --git a/src/Tools/embedded/Qt/cxx/PreCompiled.h b/src/Tools/embedded/Qt/cxx/PreCompiled.h
index ddd265a89e..4016c18530 100644
--- a/src/Tools/embedded/Qt/cxx/PreCompiled.h
+++ b/src/Tools/embedded/Qt/cxx/PreCompiled.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #ifndef QT_CXX_PRECOMPILED_H
 #define QT_CXX_PRECOMPILED_H
 
diff --git a/src/Tools/embedded/Qt/cxx/main.cpp b/src/Tools/embedded/Qt/cxx/main.cpp
index ca2da30e1f..6e3495b58c 100644
--- a/src/Tools/embedded/Qt/cxx/main.cpp
+++ b/src/Tools/embedded/Qt/cxx/main.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 
 #include <QApplication>
 #include <QDialog>
diff --git a/src/Tools/embedded/Qt/cxx/plugin.cpp b/src/Tools/embedded/Qt/cxx/plugin.cpp
index 68a3d61ce6..522522aae8 100644
--- a/src/Tools/embedded/Qt/cxx/plugin.cpp
+++ b/src/Tools/embedded/Qt/cxx/plugin.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 
 #include <QApplication>
 #include <QMainWindow>
diff --git a/src/Tools/embedded/Qt/main.cpp b/src/Tools/embedded/Qt/main.cpp
index b2ab4a0c4d..3b06317f24 100644
--- a/src/Tools/embedded/Qt/main.cpp
+++ b/src/Tools/embedded/Qt/main.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 
 #include <Python.h>
 #include <QApplication>
diff --git a/src/Tools/embedded/Qt/mainwindow.cpp b/src/Tools/embedded/Qt/mainwindow.cpp
index f930a12770..ff232464c1 100644
--- a/src/Tools/embedded/Qt/mainwindow.cpp
+++ b/src/Tools/embedded/Qt/mainwindow.cpp
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 
 #include <Python.h>
 #include <QtGui>
diff --git a/src/Tools/embedded/Qt/mainwindow.h b/src/Tools/embedded/Qt/mainwindow.h
index f7472d7c06..93e950737c 100644
--- a/src/Tools/embedded/Qt/mainwindow.h
+++ b/src/Tools/embedded/Qt/mainwindow.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
 
 #ifndef MAINWINDOW_H
 #define MAINWINDOW_H
diff --git a/src/Tools/embedded/Win32/FreeCAD_widget/FreeCAD_widget.cpp b/src/Tools/embedded/Win32/FreeCAD_widget/FreeCAD_widget.cpp
index 3eaac9997f..f7c82bf317 100644
--- a/src/Tools/embedded/Win32/FreeCAD_widget/FreeCAD_widget.cpp
+++ b/src/Tools/embedded/Win32/FreeCAD_widget/FreeCAD_widget.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 // FreeCAD_widget.cpp : Defines the entry point for the application.
 //
 
diff --git a/src/Tools/embedded/Win32/FreeCAD_widget/FreeCAD_widget.h b/src/Tools/embedded/Win32/FreeCAD_widget/FreeCAD_widget.h
index e60f2eb7ed..e6ff0a3368 100644
--- a/src/Tools/embedded/Win32/FreeCAD_widget/FreeCAD_widget.h
+++ b/src/Tools/embedded/Win32/FreeCAD_widget/FreeCAD_widget.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #pragma once
 
 #include "resource.h"
diff --git a/src/Tools/embedded/Win32/FreeCAD_widget/resource.h b/src/Tools/embedded/Win32/FreeCAD_widget/resource.h
index 335e7928e6..b6079abc91 100644
--- a/src/Tools/embedded/Win32/FreeCAD_widget/resource.h
+++ b/src/Tools/embedded/Win32/FreeCAD_widget/resource.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 //{{NO_DEPENDENCIES}}
 // Microsoft Visual C++ generated include file.
 // Used by FreeCAD_widget.rc
diff --git a/src/Tools/embedded/Win32/FreeCAD_widget/stdafx.cpp b/src/Tools/embedded/Win32/FreeCAD_widget/stdafx.cpp
index 370cff3253..dae4becf73 100644
--- a/src/Tools/embedded/Win32/FreeCAD_widget/stdafx.cpp
+++ b/src/Tools/embedded/Win32/FreeCAD_widget/stdafx.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 // stdafx.cpp : source file that includes just the standard includes
 // FreeCAD_widget.pch will be the pre-compiled header
 // stdafx.obj will contain the pre-compiled type information
diff --git a/src/Tools/embedded/Win32/FreeCAD_widget/stdafx.h b/src/Tools/embedded/Win32/FreeCAD_widget/stdafx.h
index fdee2a522e..d2a7b38e28 100644
--- a/src/Tools/embedded/Win32/FreeCAD_widget/stdafx.h
+++ b/src/Tools/embedded/Win32/FreeCAD_widget/stdafx.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 // stdafx.h : include file for standard system include files,
 // or project specific include files that are used frequently, but
 // are changed infrequently
diff --git a/src/Tools/embedded/Win32/FreeCAD_widget/targetver.h b/src/Tools/embedded/Win32/FreeCAD_widget/targetver.h
index f477c8681c..3caafcd4e5 100644
--- a/src/Tools/embedded/Win32/FreeCAD_widget/targetver.h
+++ b/src/Tools/embedded/Win32/FreeCAD_widget/targetver.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #pragma once
 
 // The following macros define the minimum required platform.  The minimum required platform
diff --git a/src/Tools/embedded/glib/main.c b/src/Tools/embedded/glib/main.c
index 9d4a5fbfaa..1830695845 100644
--- a/src/Tools/embedded/glib/main.c
+++ b/src/Tools/embedded/glib/main.c
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 #include <Python.h>
 #include <gtk/gtk.h>
 #include <stdlib.h>
diff --git a/src/Tools/examplePy2wiki.py b/src/Tools/examplePy2wiki.py
index f4cb678fd7..2cd207d01a 100644
--- a/src/Tools/examplePy2wiki.py
+++ b/src/Tools/examplePy2wiki.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2009 Juergen Riegel GPL
 
 Usage = """examplePy2wiki - generating a wiki text out of a python example
diff --git a/src/Tools/fcbt.py b/src/Tools/fcbt.py
index 73496fc924..0e446c885d 100644
--- a/src/Tools/fcbt.py
+++ b/src/Tools/fcbt.py
@@ -1,4 +1,6 @@
 #!python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 #  FreeCAD Build Tool
 # (c) 2004 Juergen Riegel
 
diff --git a/src/Tools/fcbt/BuildDoc.py b/src/Tools/fcbt/BuildDoc.py
index 5e4ac0f0eb..9254826300 100644
--- a/src/Tools/fcbt/BuildDoc.py
+++ b/src/Tools/fcbt/BuildDoc.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # shell and operating system
 import os, sys, FileTools
 
diff --git a/src/Tools/fcbt/BuildDocDoxy.cfg b/src/Tools/fcbt/BuildDocDoxy.cfg
index 737e95a478..3bff6bd7e6 100644
--- a/src/Tools/fcbt/BuildDocDoxy.cfg
+++ b/src/Tools/fcbt/BuildDocDoxy.cfg
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 # Doxyfile 1.3.8
 
 #---------------------------------------------------------------------------
diff --git a/src/Tools/fcbt/CreateModule.py b/src/Tools/fcbt/CreateModule.py
index 1710bbacac..88fcfa5d44 100644
--- a/src/Tools/fcbt/CreateModule.py
+++ b/src/Tools/fcbt/CreateModule.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # FreeCAD MakeNewBuildNbr script
 # (c) 2003 Werner Mayer
 #
diff --git a/src/Tools/fcbt/CreatePyModule.py b/src/Tools/fcbt/CreatePyModule.py
index 4ff1b697b5..910a2ce405 100644
--- a/src/Tools/fcbt/CreatePyModule.py
+++ b/src/Tools/fcbt/CreatePyModule.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # ***************************************************************************
 # *   Copyright (c) 2003 Werner Mayer <werner.wm.mayer@gmx.de>              *
 # *                                                                         *
diff --git a/src/Tools/fcbt/DistBin.py b/src/Tools/fcbt/DistBin.py
index 1785c42d46..979b69bd4b 100644
--- a/src/Tools/fcbt/DistBin.py
+++ b/src/Tools/fcbt/DistBin.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # shell and operating system
 import os, sys
 
diff --git a/src/Tools/fcbt/DistSetup.py b/src/Tools/fcbt/DistSetup.py
index 2acd816c16..0dfe9c668d 100644
--- a/src/Tools/fcbt/DistSetup.py
+++ b/src/Tools/fcbt/DistSetup.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 from . import DistTools, FileTools
 
 DistName = DistTools.BuildDistName()
diff --git a/src/Tools/fcbt/DistSrc.py b/src/Tools/fcbt/DistSrc.py
index 9786b05f2c..db8c55e013 100644
--- a/src/Tools/fcbt/DistSrc.py
+++ b/src/Tools/fcbt/DistSrc.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # shell and operating system
 import os, sys
 
diff --git a/src/Tools/fcbt/DistTools.py b/src/Tools/fcbt/DistTools.py
index 72f3b7e00a..a4bc48fa34 100644
--- a/src/Tools/fcbt/DistTools.py
+++ b/src/Tools/fcbt/DistTools.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # shell and operating system
 import os
 
diff --git a/src/Tools/fcbt/FileTools.py b/src/Tools/fcbt/FileTools.py
index 1178e46ba1..a8e133b4d0 100644
--- a/src/Tools/fcbt/FileTools.py
+++ b/src/Tools/fcbt/FileTools.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # shell and operating system
 import os, sys, re
 
diff --git a/src/Tools/fcbt/NextBuildNumber.py b/src/Tools/fcbt/NextBuildNumber.py
index 0c531b2d09..b7276c30e3 100644
--- a/src/Tools/fcbt/NextBuildNumber.py
+++ b/src/Tools/fcbt/NextBuildNumber.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # ***************************************************************************
 # *   Copyright (c) 2002 Juergen Riegel <juergen.riegel@web.de>             *
 # *                                                                         *
diff --git a/src/Tools/fcbt/__init__.py b/src/Tools/fcbt/__init__.py
index e69de29bb2..bd4fba4dfe 100644
--- a/src/Tools/fcbt/__init__.py
+++ b/src/Tools/fcbt/__init__.py
@@ -0,0 +1 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
diff --git a/src/Tools/fcinfo b/src/Tools/fcinfo
index 23598065ac..8062279b01 100755
--- a/src/Tools/fcinfo
+++ b/src/Tools/fcinfo
@@ -1,4 +1,5 @@
 #!/usr/bin/python3
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 # -*- coding: utf8 -*-
 
diff --git a/src/Tools/freecad-thumbnailer.in b/src/Tools/freecad-thumbnailer.in
index 09c11cd8d5..1cfeae0676 100644
--- a/src/Tools/freecad-thumbnailer.in
+++ b/src/Tools/freecad-thumbnailer.in
@@ -1,4 +1,6 @@
 #!/usr/bin/python3
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 """Support file to show FreeCAD thumbnails on Free Desktop Environments (like GNOME or KDE)
 
 Installation:
diff --git a/src/Tools/githubstats.py b/src/Tools/githubstats.py
index f29feebd62..aae668e7d6 100755
--- a/src/Tools/githubstats.py
+++ b/src/Tools/githubstats.py
@@ -1,4 +1,5 @@
 #!/usr/bin/python
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 print("Fetching download statistics from github...")
 
diff --git a/src/Tools/make_snapshot.py b/src/Tools/make_snapshot.py
index 2ac9dceb61..25969b23e1 100644
--- a/src/Tools/make_snapshot.py
+++ b/src/Tools/make_snapshot.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2022 Werner Mayer LGPL
 
 """
diff --git a/src/Tools/makedist.py b/src/Tools/makedist.py
index fc3a6e65d5..7610ff19e6 100644
--- a/src/Tools/makedist.py
+++ b/src/Tools/makedist.py
@@ -1,4 +1,6 @@
 #! python
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # (c) 2006 Werner Mayer LGPL
 #
 # Python script to make source tarballs.
diff --git a/src/Tools/params_utils.py b/src/Tools/params_utils.py
index d2c65f8064..3a3b3ba3a3 100644
--- a/src/Tools/params_utils.py
+++ b/src/Tools/params_utils.py
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 # ***************************************************************************
 # *   Copyright (c) 2022 Zheng Lei (realthunder) <realthunder.dev@gmail.com>*
 # *                                                                         *
diff --git a/src/Tools/plugins/widget/CMakeLists.txt b/src/Tools/plugins/widget/CMakeLists.txt
index 3f5adeb136..c66c44d788 100644
--- a/src/Tools/plugins/widget/CMakeLists.txt
+++ b/src/Tools/plugins/widget/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 if (PROJECT_NAME)
     set(IS_SUB_PROJECT TRUE)
 endif()
diff --git a/src/Tools/plugins/widget/customwidgets.cpp b/src/Tools/plugins/widget/customwidgets.cpp
index 2514dbc18f..bfe40808c5 100644
--- a/src/Tools/plugins/widget/customwidgets.cpp
+++ b/src/Tools/plugins/widget/customwidgets.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) 2006 Werner Mayer <werner.wm.mayer@gmx.de>              *
  *                                                                         *
diff --git a/src/Tools/plugins/widget/customwidgets.h b/src/Tools/plugins/widget/customwidgets.h
index ed91cf2c24..a97413761c 100644
--- a/src/Tools/plugins/widget/customwidgets.h
+++ b/src/Tools/plugins/widget/customwidgets.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) 2006 Werner Mayer <werner.wm.mayer@gmx.de>              *
  *                                                                         *
diff --git a/src/Tools/plugins/widget/plugin.cpp b/src/Tools/plugins/widget/plugin.cpp
index dee5844e13..0f142a9e5d 100644
--- a/src/Tools/plugins/widget/plugin.cpp
+++ b/src/Tools/plugins/widget/plugin.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) 2006 Werner Mayer <werner.wm.mayer@gmx.de>              *
  *                                                                         *
diff --git a/src/Tools/plugins/widget/plugin.h b/src/Tools/plugins/widget/plugin.h
index 6accfb5d75..e38228cb4d 100644
--- a/src/Tools/plugins/widget/plugin.h
+++ b/src/Tools/plugins/widget/plugin.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) 2006 Werner Mayer <werner.wm.mayer@gmx.de>              *
  *                                                                         *
diff --git a/src/Tools/plugins/widget/plugin.pro b/src/Tools/plugins/widget/plugin.pro
index 4e11ebe1f5..2e9c4b6b11 100644
--- a/src/Tools/plugins/widget/plugin.pro
+++ b/src/Tools/plugins/widget/plugin.pro
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
 
 TEMPLATE = lib
 CONFIG += plugin
diff --git a/src/Tools/plugins/widget/wizard.cpp b/src/Tools/plugins/widget/wizard.cpp
index 3a51e4b6ba..fa9b8803fc 100644
--- a/src/Tools/plugins/widget/wizard.cpp
+++ b/src/Tools/plugins/widget/wizard.cpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) 2007 Werner Mayer <wmayer@users.sourceforge.net>        *
  *                                                                         *
diff --git a/src/Tools/plugins/widget/wizard.h b/src/Tools/plugins/widget/wizard.h
index 02d8da75e8..a8eed3ad66 100644
--- a/src/Tools/plugins/widget/wizard.h
+++ b/src/Tools/plugins/widget/wizard.h
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
 /***************************************************************************
  *   Copyright (c) 2007 Werner Mayer <wmayer@users.sourceforge.net>        *
  *                                                                         *
diff --git a/src/Tools/xmlformat/CMakeLists.txt b/src/Tools/xmlformat/CMakeLists.txt
index b06e4d0798..d40383ac60 100644
--- a/src/Tools/xmlformat/CMakeLists.txt
+++ b/src/Tools/xmlformat/CMakeLists.txt
@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+
 cmake_minimum_required(VERSION 3.14)
 
 project(xmlformat LANGUAGES CXX)