diff --git a/global.cpp b/global.cpp
index ac5bcd2..a664050 100644
--- a/global.cpp
+++ b/global.cpp
@@ -36,11 +36,11 @@ QString getValue(const QString &string, const QString &key, Type type)
         result.remove(QRegularExpression("^.*"+key+"\\s*=", QRegularExpression::DotMatchesEverythingOption));
     }
 
-    QString separator {"\n"};
+    QString separator {'\n'};
     if (type == eForTriggers) {
         separator = ":::";
     } else if (type == eForWeb) {
-        separator = " ";
+        separator = '&';
     } else if (type == eHttpHeader) {
         separator = "\r\n";
     }
@@ -49,6 +49,13 @@ QString getValue(const QString &string, const QString &key, Type type)
     if (valueEnd != -1) {
         result.remove(valueEnd, result.size()-valueEnd);
     }
+    else if (valueEnd == -1 and type == eForWeb) {
+        separator = ' ';
+        valueEnd = result.indexOf(separator);
+        if (valueEnd != -1) {
+            result.remove(valueEnd, result.size()-valueEnd);
+        }
+    }
 
     if (type == eForWeb) {
         result = QByteArray::fromPercentEncoding(result.toUtf8());
diff --git a/html/main.html b/html/main.html
index 5581fc8..94cb858 100644
--- a/html/main.html
+++ b/html/main.html
@@ -20,9 +20,17 @@
                 </div>
                 <div class="main_header__search">
                     <form class="main_header__search_form" method="get">
-                        <input class="main_header__search_input" type="search" name="toSearch" placeholder="{{SEARCH_PLACEHOLDER}}">
-                        <div class="main_header__search_button">
-                            <input class="main_header__search_button__img" type="submit" value="">
+                        <div class="main_header__search_block">
+                            <input class="main_header__search_input" type="search" name="toSearch" placeholder="{{SEARCH_PLACEHOLDER}}">
+                            <div class="main_header__search_button">
+                                <input class="main_header__search_button__img" type="submit" value="">
+                            </div>
+                        </div>
+                        <div class="main_header__search_checkbox">
+                            <input id="main_header__search_checkbox__button" type="checkbox" name="isRegexp">
+                            <label style="cursor: pointer;" for="main_header__search_checkbox__button">
+                                Regular expression
+                            </label>
                         </div>
                     </form>
                 </div>
diff --git a/html/style.css b/html/style.css
index 9bc725c..0b57d18 100644
--- a/html/style.css
+++ b/html/style.css
@@ -104,11 +104,18 @@ body {
     width: 100%;
     height: 70%;
     display: flex;
+    flex-direction: column;
+}
+
+.main_header__search_block {
+    flex: 90%;
+    width: 100%;
+    display: flex;
     flex-direction: row;
 }
 
 .main_header__search_input {
-    width: 75%;
+    width: 80%;
     height: 100%;
     border: 2px solid #b6c7d6;
     font-size: 18px;
@@ -119,7 +126,7 @@ body {
 .main_header__search_button {
     width: 20%;
     margin-left: 2%;
-    height: 84%;
+    height: 87%;
     border: 2px solid #b6c7d6;
 }
 
@@ -138,6 +145,10 @@ body {
     border: 2px solid #6493bc;
 }
 
+.main_header__search_checkbox {
+    color: #6493bc;
+}
+
 .main_middle {
     flex: 3%;
     display: flex;
diff --git a/httpserver.cpp b/httpserver.cpp
index e4125ce..f71aa08 100644
--- a/httpserver.cpp
+++ b/httpserver.cpp
@@ -70,10 +70,7 @@ std::pair<QString, QString> HttpServer::splitUserNameAndMessage(const QString &r
         return result;
     }
 
-    nick.replace('&', "&amp;");
-    nick.replace('<', "&lt;");
-    nick.replace('>', "&gt;");
-    nick.replace('\"', "&quot;");
+    nick = nick.toHtmlEscaped();
 
     // long nicks
     if (nick.size() > MAX_NICKNAME_LENGTH_WITHOUT_WBR) {
@@ -86,10 +83,7 @@ std::pair<QString, QString> HttpServer::splitUserNameAndMessage(const QString &r
         }
     }
 
-    text.replace('&', "&amp;");
-    text.replace('<', "&lt;");
-    text.replace('>', "&gt;");
-    text.replace('\"', "&quot;");
+    text = text.toHtmlEscaped();
 
     // http links
     while (QRegularExpression("(^|\\s)http.?://").match(text).hasMatch()) {
@@ -391,9 +385,11 @@ void HttpServer::replaceTag(QString &page, const QString &tag, const QString &pa
 void HttpServer::writeMainPage(QTcpSocket *socket, QString &urlPath, bool isHeadRequest)
 {
     QString searchRequest;
+    bool isRegexp {false};
     int specSymbol = urlPath.indexOf('?'); // any actions like a ?toSearch=
     if (specSymbol != -1) {
         searchRequest = global::getValue(urlPath, "toSearch", global::eForWeb);
+        isRegexp = global::getValue(urlPath, "isRegexp", global::eForWeb) == "on";
         urlPath.remove(specSymbol, urlPath.size()-specSymbol);
     }
     if (urlPath == "/") {
@@ -409,10 +405,15 @@ void HttpServer::writeMainPage(QTcpSocket *socket, QString &urlPath, bool isHead
     else {
         if (socket->isOpen()) {
             socket->write(HEADER_404.toUtf8());
-            if (not isHeadRequest) socket->write("<title>Critical error</title><center><h1>NOT FOUND</H1><p>Maybe it is compilation error</p></center>");
+            if (not isHeadRequest) socket->write("<title>Critical error</title><center><h1>NOT FOUND</H1><p>Maybe it's compile time error</p></center>");
         }
     }
 
+    if (isRegexp) {
+        page.replace("<input id=\"main_header__search_checkbox__button\" type=\"checkbox\" name=\"isRegexp\">",
+                     "<input id=\"main_header__search_checkbox__button\" type=\"checkbox\" name=\"isRegexp\" checked>");
+    }
+
     QString server = getWordFromPath(urlPath);
     QDir fsPath(m_logFolder+server);
     if (not fsPath.exists()) {
@@ -609,7 +610,10 @@ void HttpServer::writeMainPage(QTcpSocket *socket, QString &urlPath, bool isHead
     replaceTag(page, "ONLINE", QString::number(currentOnline));
     replaceTag(page, "ONLINE_LIST", onlineUserS);
 
-    if (middlePath == "/") {
+    if (not searchRequest.isEmpty()) {
+        page.replace("<input class=\"main_header__search_input\" type=\"search\" name=\"toSearch\" placeholder=\"{{SEARCH_PLACEHOLDER}}\">",
+                     "<input class=\"main_header__search_input\" type=\"search\" name=\"toSearch\" value=\"" + searchRequest + "\">");
+    } else if (middlePath == "/") {
         replaceTag(page, "SEARCH_PLACEHOLDER", originalChannelName);
     } else if (month.isEmpty()) {
         replaceTag(page, "SEARCH_PLACEHOLDER", originalChannelName + "/" + year);
@@ -625,7 +629,9 @@ void HttpServer::writeMainPage(QTcpSocket *socket, QString &urlPath, bool isHead
         uint counter = 0;
         QRegularExpression userRgx(searchRequest, QRegularExpression::CaseInsensitiveOption);
         bool rgxIsValid = false;
-        if (userRgx.isValid()) rgxIsValid = true;
+        if (isRegexp and userRgx.isValid()) {
+            rgxIsValid = true;
+        }
         consoleLog("Search request (" + server + "): " + searchRequest);
 
         if (not day.isEmpty()) {
@@ -898,7 +904,9 @@ void HttpServer::writeMainPage(QTcpSocket *socket, QString &urlPath, bool isHead
                 }
             }
         }
-        middlePath += " [" + searchRequest + "]: " + QString::number(counter);
+        middlePath += " " + searchRequest + " ";
+        if (rgxIsValid) middlePath += "rgx";
+        middlePath += "(" + QString::number(counter) + ")";
     }
 
     // Plain log explorer
diff --git a/httpserver.h b/httpserver.h
index 781a72c..7fa9239 100644
--- a/httpserver.h
+++ b/httpserver.h
@@ -5,7 +5,7 @@
 #include <QTcpServer>
 #include <map>
 
-const QString HTTP_ACTUAL_ETAG {"2021-12-15"}; // Change it if svg, css or ico was modified
+const QString HTTP_ACTUAL_ETAG {"2021-12-24"}; // Change it if svg, css or ico was modified
 
 class HttpServer : public QObject
 {
@@ -25,6 +25,7 @@ private:
     void replaceTag(QString& page, const QString& tag, const QString& payload);
     void consoleLog(const QString &message);
     void debugLog(const QString &url);
+
     QTcpServer* m_TcpServer;
     QString m_mainChannel;
     QString m_logFolder;
diff --git a/ircclient.cpp b/ircclient.cpp
index 512f791..4ea9275 100644
--- a/ircclient.cpp
+++ b/ircclient.cpp
@@ -10,6 +10,7 @@
 
 const int NICK_RECOVER_TIMER = 60000; // 1 minute
 const int THREAD_SLEEP_ON_RECONNECT = 3; // seconds
+const int USER_LIST_ACTIALIZE = 1800000; // 30 minutes
 
 IrcClient::IrcClient(const ConnectionData& config, QObject *parent) :
     QObject(parent),
@@ -265,7 +266,7 @@ void IrcClient::onRead()
         if (not m_connected) {
             consoleLog("Connected to server!");
             m_timerToJoin.start(1000);
-            m_usersActualize.start(1800000); // 30 munites
+            m_usersActualize.start(USER_LIST_ACTIALIZE);
             m_connected = true;
             emit myOnline(m_connectionData.displayName, m_connected);
         }