diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,6 +15,7 @@
 
 include(ECMSetupVersion)
 include(ECMMarkNonGuiExecutable)
+include(ECMQtDeclareLoggingCategory)
 include(CMakePackageConfigHelpers)
 include(GenerateExportHeader)
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -25,8 +25,15 @@
     install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${_custom_dtd_kdex}.install DESTINATION ${KDE_INSTALL_DATADIR_KF5}/kdoctools/customization/dtd RENAME ${_custom_dtd_kdex_name})
 endif()
 
+ecm_qt_declare_logging_category(kdoctoolslog_core_SRCS
+    HEADER loggingcategory.h
+    IDENTIFIER KDocToolsLog
+    CATEGORY_NAME kf5.kdoctools
+    DEFAULT_SEVERITY Warning
+)
+
 # needed by KIO, need to export it
-add_library(KF5DocTools SHARED xslt.cpp xslt_kde.cpp)
+add_library(KF5DocTools SHARED xslt.cpp xslt_kde.cpp ${kdoctoolslog_core_SRCS})
 generate_export_header(KF5DocTools BASE_NAME KDocTools EXPORT_FILE_NAME "${CMAKE_CURRENT_BINARY_DIR}/kdoctools_export.h")
 add_library(KF5::DocTools ALIAS KF5DocTools)
 if (NOT MEINPROC_NO_KARCHIVE)
@@ -102,7 +109,7 @@
     set(meinproc_additional_LIBS KF5::Archive)
 endif()
 
-add_executable(meinproc5 meinproc.cpp meinproc_common.cpp xslt.cpp ${meinproc_additional_SRCS})
+add_executable(meinproc5 meinproc.cpp meinproc_common.cpp xslt.cpp ${meinproc_additional_SRCS} ${kdoctoolslog_core_SRCS})
 ecm_mark_nongui_executable(meinproc5)
 target_link_libraries(meinproc5 Qt5::Core KF5::DocTools ${LIBXML2_LIBRARIES} ${LIBXSLT_LIBRARIES} ${LIBXSLT_EXSLT_LIBRARIES} ${meinproc_additional_LIBS})
 install(TARGETS meinproc5 EXPORT KF5DocToolsTargets ${KF5_INSTALL_TARGETS_DEFAULT_ARGS})
@@ -198,7 +205,7 @@
 
 ########### l10n xml helper ###############
 
-set( docbookl10nhelper_SRCS docbookl10nhelper.cpp )
+set( docbookl10nhelper_SRCS docbookl10nhelper.cpp ${kdoctoolslog_core_SRCS})
 add_executable( docbookl10nhelper ${docbookl10nhelper_SRCS} )
 ecm_mark_nongui_executable( docbookl10nhelper )
 target_link_libraries( docbookl10nhelper Qt5::Core )
@@ -225,7 +232,7 @@
 
 ########### checkxml5 helper ###############
 
-set( checkXML5_SRCS checkXML5.cpp )
+set( checkXML5_SRCS checkXML5.cpp ${kdoctoolslog_core_SRCS})
 add_executable( checkXML5 ${checkXML5_SRCS} )
 ecm_mark_nongui_executable( checkXML5 )
 target_link_libraries( checkXML5 Qt5::Core )
diff --git a/src/checkXML5.cpp b/src/checkXML5.cpp
--- a/src/checkXML5.cpp
+++ b/src/checkXML5.cpp
@@ -18,6 +18,8 @@
     License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#include "loggingcategory.h"
+
 #include <QCoreApplication>
 #include <QProcess>
 #include <QDebug>
@@ -30,7 +32,7 @@
 
     const QStringList arguments = app.arguments();
     if (arguments.count() != 2) {
-        qCritical() << "wrong argument count";
+        qCCritical(KDocToolsLog) << "wrong argument count";
         return (1);
     }
 
diff --git a/src/docbookl10nhelper.cpp b/src/docbookl10nhelper.cpp
--- a/src/docbookl10nhelper.cpp
+++ b/src/docbookl10nhelper.cpp
@@ -18,6 +18,8 @@
     License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#include "loggingcategory.h"
+
 #include <QCoreApplication>
 #include <QDebug>
 #include <QDir>
@@ -50,8 +52,8 @@
 
     QFile outFile(fname);
     if (! outFile.open(QIODevice::WriteOnly)) {
-        qCritical() << QStringLiteral("Could not write %1")
-                    .arg(outFile.fileName());
+        qCCritical(KDocToolsLog) << QStringLiteral("Could not write %1")
+                                 .arg(outFile.fileName());
         return (1);
     }
 
@@ -62,7 +64,7 @@
 
     LangListType::const_iterator i = langMap.constBegin();
     while (i != langMap.constEnd()) {
-        //qDebug() << (*i).first << ": " << (*i).second;
+        //qCDebug(KDocToolsLog) << (*i).first << ": " << (*i).second;
         outStream << QStringLiteral("<!ENTITY %1 SYSTEM \"%2\">")
                   .arg((*i).first).arg((*i).second) << endl;
         ++i;
@@ -93,8 +95,8 @@
 
     QFile outFile(fname);
     if (! outFile.open(QIODevice::WriteOnly)) {
-        qCritical() << QStringLiteral("Could not write %1")
-                    .arg(outFile.fileName());
+        qCCritical(KDocToolsLog) << QStringLiteral("Could not write %1")
+                                 .arg(outFile.fileName());
         return (1);
     }
 
@@ -132,7 +134,7 @@
 
     const QStringList arguments = app.arguments();
     if (arguments.count() != 4) {
-        qCritical() << "wrong argument count";
+        qCCritical(KDocToolsLog) << "wrong argument count";
         return (1);
     }
 
@@ -143,7 +145,7 @@
     QFile i18nFile(l10nDir + QStringLiteral("common/l10n.xml"));
 
     if (! i18nFile.open(QIODevice::ReadOnly)) {
-        qCritical() << i18nFile.fileName() << " not found";
+        qCCritical(KDocToolsLog) << i18nFile.fileName() << " not found";
         return (1);
     }
 
@@ -173,10 +175,10 @@
         case 0:
             if (rxDocType.indexIn(line) != -1) {
                 parsingState = 1;
-                //qDebug() << "DTD found";
+                //qCDebug(KDocToolsLog) << "DTD found";
             } else if (rxDocType2.indexIn(line) != -1) {
                 parsingState = 1;
-                //qDebug() << "DTD found";
+                //qCDebug(KDocToolsLog) << "DTD found";
             }
             break;
         case 1:
@@ -186,13 +188,13 @@
                 langCode = rxEntity.cap(1);
                 langFile = l10nDir + QStringLiteral("common/") + rxEntity.cap(2);
                 allLangs += qMakePair(langCode, langFile);
-                //qDebug() << langCode << " - " << langFile;
+                //qCDebug(KDocToolsLog) << langCode << " - " << langFile;
             } else if (rxEntity2.indexIn(line) != -1  && !foundRxEntity) {
                 foundRxEntity2 = true;
                 langCode = rxEntity2.cap(1);
                 langFile = l10nDir + QStringLiteral("common/") + rxEntity2.cap(2);
                 allLangs += qMakePair(langCode, langFile);
-                //qDebug() << langCode << " - " << langFile;
+                //qCDebug(KDocToolsLog) << langCode << " - " << langFile;
             }
             break;
         }
@@ -213,7 +215,7 @@
      */
     customLangFiles.removeOne(QStringLiteral("all-l10n.xml"));
     customLangFiles.removeOne(QStringLiteral("kde-custom-l10n.xml"));
-    //qDebug() << "customLangFiles:" << customLangFiles;
+    //qCDebug(KDocToolsLog) << "customLangFiles:" << customLangFiles;
 
     /*
      * for each custom language (from directory listing), if it is not
diff --git a/src/meinproc.cpp b/src/meinproc.cpp
--- a/src/meinproc.cpp
+++ b/src/meinproc.cpp
@@ -3,6 +3,7 @@
 #include "docbookxslt.h"
 #include "docbookxslt_p.h"
 #include "meinproc_common.h"
+#include "loggingcategory.h"
 
 #include <QCoreApplication>
 #include <QtCore/QDebug>
@@ -48,7 +49,7 @@
 
 typedef QList<MyPair> PairList;
 
-#define DIE(x) do { qCritical() << "Error:" << x; exit(1); } while (0)
+#define DIE(x) do { qCCritical(KDocToolsLog) << "Error:" << x; exit(1); } while (0)
 
 void parseEntry(PairList &list, xmlNodePtr cur, int base)
 {
@@ -202,7 +203,7 @@
     const QString cache = parser.value(QStringLiteral("cache"));
 #else
     if (parser.isSet("cache")) {
-        qWarning() << QCoreApplication::translate("main", "The cache option is not available, please re-compile with KArchive support. See MEINPROC_NO_KARCHIVE in KDocTools");
+        qCWarning(KDocToolsLog) << QCoreApplication::translate("main", "The cache option is not available, please re-compile with KArchive support. See MEINPROC_NO_KARCHIVE in KDocTools");
     }
 #endif
     const bool usingStdOut = parser.isSet(QStringLiteral("stdout"));
@@ -217,7 +218,7 @@
 #ifndef MEINPROC_NO_KARCHIVE
     if (!cache.isEmpty()) {
         if (!saveToCache(output, cache)) {
-            qWarning() << QCoreApplication::translate("main", "Could not write to cache file %1.").arg(cache);
+            qCWarning(KDocToolsLog) << QCoreApplication::translate("main", "Could not write to cache file %1.").arg(cache);
         }
         goto end;
     }
diff --git a/src/meinproc_common.h b/src/meinproc_common.h
--- a/src/meinproc_common.h
+++ b/src/meinproc_common.h
@@ -2,7 +2,6 @@
 #ifndef MEINPROC_COMMON_H
 #define MEINPROC_COMMON_H
 
-#include <QDebug>
 #include <QString>
 
 enum CheckFileResult {
diff --git a/src/xslt.cpp b/src/xslt.cpp
--- a/src/xslt.cpp
+++ b/src/xslt.cpp
@@ -8,6 +8,7 @@
 #endif
 
 #include "../config-kdoctools.h"
+#include "loggingcategory.h"
 
 #include <libxslt/xsltconfig.h>
 #include <libxslt/xsltInternals.h>
@@ -67,7 +68,7 @@
     for (i = replaceURLList.constBegin(); i != replaceURLList.constEnd(); i++) {
         if (url.startsWith(i.key())) {
             url.replace(i.key(), i.value());
-            qDebug() << "converted" << _URL << "to" << url;
+            qCDebug(KDocToolsLog) << "converted" << _URL << "to" << url;
         }
     }
     char URL[1024];
@@ -96,7 +97,7 @@
             if (warning != NULL) {
                 ctxt->sax->warning = warning;
             }
-            qDebug() << "Loaded URL=\"" << URL << "\" ID=\"" << ID << "\"";
+            qCDebug(KDocToolsLog) << "Loaded URL=\"" << URL << "\" ID=\"" << ID << "\"";
             return (ret);
         }
     }
@@ -112,7 +113,7 @@
                 if (warning != NULL) {
                     ctxt->sax->warning = warning;
                 }
-                qDebug() << "Loaded URL=\"" << newURL << "\" ID=\"" << ID << "\"";
+                qCDebug(KDocToolsLog) << "Loaded URL=\"" << newURL << "\" ID=\"" << ID << "\"";
                 xmlFree(newURL);
                 return (ret);
             }
@@ -257,11 +258,11 @@
         int endindex = parsed.indexOf(QStringLiteral("</FILENAME>"), index);
         int startindex = parsed.indexOf(QStringLiteral("<FILENAME "), index) + 1;
 
-//        //qDebug() << "FILENAME " << startindex << " " << endindex << " " << inside << " " << parsed.mid(startindex + 18, 15)<< " " << parsed.length();
+        //qCDebug(KDocToolsLog) << "FILENAME " << startindex << " " << endindex << " " << inside << " " << parsed.mid(startindex + 18, 15)<< " " << parsed.length();
 
         if (startindex > 0) {
             if (startindex < endindex) {
-                //              //qDebug() << "finding another";
+                //qCDebug(KDocToolsLog) << "finding another";
                 index = startindex + 8;
                 inside++;
             } else {
@@ -396,7 +397,7 @@
         catalogs += QUrl::fromLocalFile(srcdir + QStringLiteral("/customization/catalog.xml")).toEncoded();
         s_dtdDirs()->srcdir = srcdir;
     }
-    //qDebug() << "XML_CATALOG_FILES: " << catalogs;
+    //qCDebug(KDocToolsLog) << "XML_CATALOG_FILES: " << catalogs;
     qputenv("XML_CATALOG_FILES", catalogs);
     xmlInitializeCatalog();
 }
@@ -420,7 +421,7 @@
         if (QFile::exists(test)) {
             return QStringList() << test;
         }
-        qDebug() << "Could not locate file" << file << "in" << srcdir;
+        qCDebug(KDocToolsLog) << "Could not locate file" << file << "in" << srcdir;
         return QStringList();
     }
     // Using locateAll() is necessary to be able to find all catalogs when
@@ -444,7 +445,7 @@
     }
 
     if (result.isEmpty()) {
-        qDebug() << "Could not locate file" << fileName << "in" << QStandardPaths::standardLocations(QStandardPaths::GenericDataLocation);
+        qCDebug(KDocToolsLog) << "Could not locate file" << fileName << "in" << QStandardPaths::standardLocations(QStandardPaths::GenericDataLocation);
     }
     return result;
 }
@@ -478,6 +479,6 @@
     foreach (const QString &aCatalog, catalogFiles) {
         catalogs << aCatalog;
     }
-    //qDebug() << "Found catalogs: " << catalogs;
+    //qCDebug(KDocToolsLog) << "Found catalogs: " << catalogs;
     return catalogs;
 }
diff --git a/src/xslt_kde.cpp b/src/xslt_kde.cpp
--- a/src/xslt_kde.cpp
+++ b/src/xslt_kde.cpp
@@ -2,6 +2,7 @@
 #ifndef MEINPROC_NO_KARCHIVE
 #include <kfilterdev.h>
 #else
+#include "loggingcategory.h"
 #include <QDebug>
 #endif
 
@@ -17,7 +18,7 @@
     fd.write(contents.toUtf8());
     fd.close();
 #else
-    qWarning() << "This function is dummy because KArchive support has been disabled. "
+    qCWarning(KDocToolsLog) << "This function is dummy because KArchive support has been disabled. "
                "This mode should be enabled only for specific usage on KDE infrastructure.";
     Q_UNUSED(contents)
     Q_UNUSED(filename)