diff --git a/goldendict.pro b/goldendict.pro
index 08b5752e..f5c88c88 100644
--- a/goldendict.pro
+++ b/goldendict.pro
@@ -34,7 +34,8 @@ CONFIG( release, debug|release ) {
 # DEPENDPATH += . generators
 INCLUDEPATH += .
 INCLUDEPATH += ./src/
-INCLUDEPATH += ./src/ui # for compiled .ui files to find headers
+INCLUDEPATH += ./src/ui    # for compiled .ui files to find headers
+INCLUDEPATH += ./src/common
 
 QT += core \
       gui \
@@ -283,10 +284,27 @@ HEADERS += \
     src/audiolink.hh \
     src/audioplayerfactory.hh \
     src/audioplayerinterface.hh \
-    src/base/globalregex.hh \
-    src/base_type.hh \
     src/btreeidx.hh \
     src/chunkedstorage.hh \
+    src/common/base_type.hh \
+    src/common/ex.hh \
+    src/common/file.hh \
+    src/common/filetype.hh \
+    src/common/fsencoding.hh \
+    src/common/gddebug.hh \
+    src/common/globalbroadcaster.hh \
+    src/common/globalregex.hh \
+    src/common/htmlescape.hh \
+    src/common/iconv.hh \
+    src/common/inc_case_folding.hh \
+    src/common/inc_diacritic_folding.hh \
+    src/common/mutex.hh \
+    src/common/sptr.hh \
+    src/common/ufile.hh \
+    src/common/utf8.hh \
+    src/common/utils.hh \
+    src/common/wstring.hh \
+    src/common/wstring_qt.hh \
     src/config.hh \
     src/country.hh \
     src/decompress.hh \
@@ -312,6 +330,7 @@ HEADERS += \
     src/dict/mdx.hh \
     src/dict/mediawiki.hh \
     src/dict/programs.hh \
+    src/dict/ripemd.hh \
     src/dict/romaji.hh \
     src/dict/russiantranslit.hh \
     src/dict/sdict.hh \
@@ -327,29 +346,19 @@ HEADERS += \
     src/dict/zim.hh \
     src/dict/zipsounds.hh \
     src/dictzip.hh \
-    src/ex.hh \
     src/externalaudioplayer.hh \
     src/externalviewer.hh \
     src/ffmpegaudio.hh \
     src/ffmpegaudioplayer.hh \
-    src/file.hh \
-    src/filetype.hh \
     src/folding.hh \
-    src/fsencoding.hh \
     src/ftshelpers.hh \
     src/fulltextsearch.hh \
     src/gdappstyle.hh \
-    src/gddebug.hh \
     src/gestures.hh \
-    src/globalbroadcaster.hh \
     src/headwordsmodel.hh \
     src/history.hh \
     src/hotkeywrapper.hh \
-    src/htmlescape.hh \
-    src/iconv.hh \
     src/iframeschemehandler.hh \
-    src/inc_case_folding.hh \
-    src/inc_diacritic_folding.hh \
     src/indexedzip.hh \
     src/initializing.hh \
     src/instances.hh \
@@ -357,15 +366,11 @@ HEADERS += \
     src/langcoder.hh \
     src/language.hh \
     src/multimediaaudioplayer.hh \
-    src/mutex.hh \
     src/parsecmdline.hh \
     src/resourceschemehandler.hh \
-    src/ripemd.hh \
     src/splitfile.hh \
-    src/sptr.hh \
     src/termination.hh \
     src/tiff.hh \
-    src/ufile.hh \
     src/ui/about.hh \
     src/ui/article_inspect.hh \
     src/ui/articleview.hh \
@@ -393,15 +398,11 @@ HEADERS += \
     src/ui/searchpanewidget.hh \
     src/ui/stylescombobox.hh \
     src/ui/translatebox.hh \
-    src/utf8.hh \
-    src/utils.hh \
     src/webmultimediadownload.hh \
     src/weburlrequestinterceptor.hh \
     src/wordfinder.hh \
     src/wordlist.hh \
-    src/wstring.hh \
-    src/wstring_qt.hh \
-    src/zipfile.hh
+    src/zipfile.hh \
 
 FORMS += $$files(src/ui/*.ui)
 
@@ -412,9 +413,21 @@ SOURCES += \
     src/atomic_rename.cc \
     src/audiolink.cc \
     src/audioplayerfactory.cc \
-    src/base/globalregex.cc \
     src/btreeidx.cc \
     src/chunkedstorage.cc \
+    src/common/file.cc \
+    src/common/filetype.cc \
+    src/common/fsencoding.cc \
+    src/common/gddebug.cc \
+    src/common/globalbroadcaster.cc \
+    src/common/globalregex.cc \
+    src/common/htmlescape.cc \
+    src/common/iconv.cc \
+    src/common/mutex.cc \
+    src/common/ufile.cc \
+    src/common/utf8.cc \
+    src/common/utils.cc \
+    src/common/wstring_qt.cc \
     src/config.cc \
     src/country.cc \
     src/decompress.cc \
@@ -440,6 +453,7 @@ SOURCES += \
     src/dict/mdx.cc \
     src/dict/mediawiki.cc \
     src/dict/programs.cc \
+    src/dict/ripemd.cc \
     src/dict/romaji.cc \
     src/dict/russiantranslit.cc \
     src/dict/sdict.cc \
@@ -458,21 +472,14 @@ SOURCES += \
     src/externalaudioplayer.cc \
     src/externalviewer.cc \
     src/ffmpegaudio.cc \
-    src/file.cc \
-    src/filetype.cc \
     src/folding.cc \
-    src/fsencoding.cc \
     src/ftshelpers.cc \
     src/fulltextsearch.cc \
     src/gdappstyle.cc \
-    src/gddebug.cc \
     src/gestures.cc \
-    src/globalbroadcaster.cc \
     src/headwordsmodel.cc \
     src/history.cc \
     src/hotkeywrapper.cc \
-    src/htmlescape.cc \
-    src/iconv.cc \
     src/iframeschemehandler.cc \
     src/indexedzip.cc \
     src/initializing.cc \
@@ -482,14 +489,11 @@ SOURCES += \
     src/language.cc \
     src/main.cc \
     src/multimediaaudioplayer.cc \
-    src/mutex.cc \
     src/parsecmdline.cc \
     src/resourceschemehandler.cc \
-    src/ripemd.cc \
     src/splitfile.cc \
     src/termination.cc \
     src/tiff.cc \
-    src/ufile.cc \
     src/ui/about.cc \
     src/ui/article_inspect.cc \
     src/ui/articleview.cc \
@@ -515,13 +519,10 @@ SOURCES += \
     src/ui/searchpanel.cc \
     src/ui/stylescombobox.cc \
     src/ui/translatebox.cc \
-    src/utf8.cc \
-    src/utils.cc \
     src/webmultimediadownload.cc \
     src/weburlrequestinterceptor.cc \
     src/wordfinder.cc \
     src/wordlist.cc \
-    src/wstring_qt.cc \
     src/zipfile.cc
 
 #speech to text
diff --git a/src/article_maker.cc b/src/article_maker.cc
index 9dc82937..dd74c340 100644
--- a/src/article_maker.cc
+++ b/src/article_maker.cc
@@ -3,19 +3,18 @@
 
 #include "article_maker.hh"
 #include "config.hh"
-#include "htmlescape.hh"
-#include "utf8.hh"
-#include "wstring_qt.hh"
-#include <limits.h>
-#include <QFile>
-#include <QUrl>
-#include <QTextDocumentFragment>
 #include "folding.hh"
-#include "langcoder.hh"
 #include "gddebug.hh"
-#include "utils.hh"
 #include "globalbroadcaster.hh"
-#include "base/globalregex.hh"
+#include "globalregex.hh"
+#include "htmlescape.hh"
+#include "langcoder.hh"
+#include "utils.hh"
+#include "wstring_qt.hh"
+#include <QFile>
+#include <QTextDocumentFragment>
+#include <QUrl>
+#include <limits.h>
 
 using std::vector;
 using std::string;
diff --git a/src/common/0README.md b/src/common/0README.md
new file mode 100644
index 00000000..2138f8fd
--- /dev/null
+++ b/src/common/0README.md
@@ -0,0 +1,3 @@
+Code shared everywhere.
+
+Consider this folder as somehow "standard library"
diff --git a/src/base_type.hh b/src/common/base_type.hh
similarity index 100%
rename from src/base_type.hh
rename to src/common/base_type.hh
diff --git a/src/ex.hh b/src/common/ex.hh
similarity index 100%
rename from src/ex.hh
rename to src/common/ex.hh
diff --git a/src/file.cc b/src/common/file.cc
similarity index 100%
rename from src/file.cc
rename to src/common/file.cc
diff --git a/src/file.hh b/src/common/file.hh
similarity index 100%
rename from src/file.hh
rename to src/common/file.hh
diff --git a/src/filetype.cc b/src/common/filetype.cc
similarity index 100%
rename from src/filetype.cc
rename to src/common/filetype.cc
diff --git a/src/filetype.hh b/src/common/filetype.hh
similarity index 100%
rename from src/filetype.hh
rename to src/common/filetype.hh
diff --git a/src/fsencoding.cc b/src/common/fsencoding.cc
similarity index 100%
rename from src/fsencoding.cc
rename to src/common/fsencoding.cc
diff --git a/src/fsencoding.hh b/src/common/fsencoding.hh
similarity index 100%
rename from src/fsencoding.hh
rename to src/common/fsencoding.hh
diff --git a/src/gddebug.cc b/src/common/gddebug.cc
similarity index 100%
rename from src/gddebug.cc
rename to src/common/gddebug.cc
diff --git a/src/gddebug.hh b/src/common/gddebug.hh
similarity index 100%
rename from src/gddebug.hh
rename to src/common/gddebug.hh
diff --git a/src/globalbroadcaster.cc b/src/common/globalbroadcaster.cc
similarity index 100%
rename from src/globalbroadcaster.cc
rename to src/common/globalbroadcaster.cc
diff --git a/src/globalbroadcaster.hh b/src/common/globalbroadcaster.hh
similarity index 100%
rename from src/globalbroadcaster.hh
rename to src/common/globalbroadcaster.hh
diff --git a/src/base/globalregex.cc b/src/common/globalregex.cc
similarity index 100%
rename from src/base/globalregex.cc
rename to src/common/globalregex.cc
diff --git a/src/base/globalregex.hh b/src/common/globalregex.hh
similarity index 100%
rename from src/base/globalregex.hh
rename to src/common/globalregex.hh
diff --git a/src/htmlescape.cc b/src/common/htmlescape.cc
similarity index 100%
rename from src/htmlescape.cc
rename to src/common/htmlescape.cc
diff --git a/src/htmlescape.hh b/src/common/htmlescape.hh
similarity index 100%
rename from src/htmlescape.hh
rename to src/common/htmlescape.hh
diff --git a/src/iconv.cc b/src/common/iconv.cc
similarity index 100%
rename from src/iconv.cc
rename to src/common/iconv.cc
diff --git a/src/iconv.hh b/src/common/iconv.hh
similarity index 100%
rename from src/iconv.hh
rename to src/common/iconv.hh
diff --git a/src/inc_case_folding.hh b/src/common/inc_case_folding.hh
similarity index 100%
rename from src/inc_case_folding.hh
rename to src/common/inc_case_folding.hh
diff --git a/src/inc_diacritic_folding.hh b/src/common/inc_diacritic_folding.hh
similarity index 100%
rename from src/inc_diacritic_folding.hh
rename to src/common/inc_diacritic_folding.hh
diff --git a/src/mutex.cc b/src/common/mutex.cc
similarity index 100%
rename from src/mutex.cc
rename to src/common/mutex.cc
diff --git a/src/mutex.hh b/src/common/mutex.hh
similarity index 100%
rename from src/mutex.hh
rename to src/common/mutex.hh
diff --git a/src/sptr.hh b/src/common/sptr.hh
similarity index 100%
rename from src/sptr.hh
rename to src/common/sptr.hh
diff --git a/src/ufile.cc b/src/common/ufile.cc
similarity index 100%
rename from src/ufile.cc
rename to src/common/ufile.cc
diff --git a/src/ufile.hh b/src/common/ufile.hh
similarity index 100%
rename from src/ufile.hh
rename to src/common/ufile.hh
diff --git a/src/utf8.cc b/src/common/utf8.cc
similarity index 100%
rename from src/utf8.cc
rename to src/common/utf8.cc
diff --git a/src/utf8.hh b/src/common/utf8.hh
similarity index 100%
rename from src/utf8.hh
rename to src/common/utf8.hh
diff --git a/src/utils.cc b/src/common/utils.cc
similarity index 100%
rename from src/utils.cc
rename to src/common/utils.cc
diff --git a/src/utils.hh b/src/common/utils.hh
similarity index 100%
rename from src/utils.hh
rename to src/common/utils.hh
diff --git a/src/wstring.hh b/src/common/wstring.hh
similarity index 100%
rename from src/wstring.hh
rename to src/common/wstring.hh
diff --git a/src/wstring_qt.cc b/src/common/wstring_qt.cc
similarity index 100%
rename from src/wstring_qt.cc
rename to src/common/wstring_qt.cc
diff --git a/src/wstring_qt.hh b/src/common/wstring_qt.hh
similarity index 100%
rename from src/wstring_qt.hh
rename to src/common/wstring_qt.hh
diff --git a/src/dict/epwing.cc b/src/dict/epwing.cc
index 0d5a6501..2a922c6d 100644
--- a/src/dict/epwing.cc
+++ b/src/dict/epwing.cc
@@ -25,7 +25,7 @@
 #include "utf8.hh"
 #include "filetype.hh"
 #include "ftshelpers.hh"
-#include "base/globalregex.hh"
+#include "globalregex.hh"
 #include "sptr.hh"
 
 namespace Epwing {
diff --git a/src/dict/mdx.cc b/src/dict/mdx.cc
index 233c193c..1514f4f4 100644
--- a/src/dict/mdx.cc
+++ b/src/dict/mdx.cc
@@ -30,19 +30,17 @@
 #include <stub_msvc.h>
 #endif
 
-#include <QDir>
-#include <QString>
-#include <QSemaphore>
-#include <QThreadPool>
-#include <QAtomicInt>
-#include <QTextDocument>
-#include <QCryptographicHash>
-
-#include <QRegularExpression>
-
+#include "globalregex.hh"
 #include "tiff.hh"
 #include "utils.hh"
-#include "base/globalregex.hh"
+#include <QAtomicInt>
+#include <QCryptographicHash>
+#include <QDir>
+#include <QRegularExpression>
+#include <QSemaphore>
+#include <QString>
+#include <QTextDocument>
+#include <QThreadPool>
 #include <QtConcurrent>
 
 namespace Mdx
diff --git a/src/ripemd.cc b/src/dict/ripemd.cc
similarity index 100%
rename from src/ripemd.cc
rename to src/dict/ripemd.cc
diff --git a/src/ripemd.hh b/src/dict/ripemd.hh
similarity index 100%
rename from src/ripemd.hh
rename to src/dict/ripemd.hh
diff --git a/src/ftshelpers.cc b/src/ftshelpers.cc
index 452bf53d..6b993f34 100644
--- a/src/ftshelpers.cc
+++ b/src/ftshelpers.cc
@@ -21,7 +21,7 @@
 
 #include "wildcard.hh"
 #include <QtConcurrent>
-#include "base/globalregex.hh"
+#include "globalregex.hh"
 #include <QFutureSynchronizer>
 #include <QSemaphoreReleaser>
 
diff --git a/src/fulltextsearch.cc b/src/fulltextsearch.cc
index ec392581..88e922f0 100644
--- a/src/fulltextsearch.cc
+++ b/src/fulltextsearch.cc
@@ -19,7 +19,7 @@
 #include <QOperatingSystemVersion>
 
 #endif
-#include "base/globalregex.hh"
+#include "globalregex.hh"
 
 namespace FTS
 {
diff --git a/src/ui/mainwindow.cc b/src/ui/mainwindow.cc
index e9dc21c3..127d9cec 100644
--- a/src/ui/mainwindow.cc
+++ b/src/ui/mainwindow.cc
@@ -39,7 +39,6 @@
 #include "gddebug.hh"
 
 #include "dictinfo.hh"
-#include "fsencoding.hh"
 #include "historypanewidget.hh"
 #include "utils.hh"
 #include <qscreen.h>
@@ -47,7 +46,7 @@
 #include "resourceschemehandler.hh"
 
 #include "keyboardstate.hh"
-#include "base/globalregex.hh"
+#include "globalregex.hh"
 
 #ifdef Q_OS_MAC
 #include "macos/macmouseover.hh"