diff --git a/apps/api/documents/api.js b/apps/api/documents/api.js
index a955a106d0..7d1fb90ae4 100644
--- a/apps/api/documents/api.js
+++ b/apps/api/documents/api.js
@@ -517,6 +517,20 @@
             if (_config.editorConfig.customization && _config.editorConfig.customization.integrationMode==='embed')
                 window.AscEmbed && window.AscEmbed.initWorker(iframe);
 
+            if (_config.document && (_config.document.isForm===undefined)) {
+                iframe.onload = function() {
+                    _sendCommand({
+                        command: 'checkParams',
+                        data: {
+                            url: _config.document.url,
+                            directUrl: _config.document.directUrl,
+                            token: _config.document.token,
+                            key: _config.document.key
+                        }
+                    })
+                };
+            }
+
             if (iframe.src) {
                 var pathArray = iframe.src.split('/');
                 this.frameOrigin = pathArray[0] + '//' + pathArray[2];
@@ -1016,14 +1030,15 @@
         if (config.frameEditorId)
             params += "&frameEditorId=" + config.frameEditorId;
 
-        var type = config.document ? /^(?:(pdf))$/.exec(config.document.fileType) : null,
-            isPdf = type && typeof type[1] === 'string';
-        if (!isPdf && (config.editorConfig && config.editorConfig.mode == 'view' ||
+        var type = config.document ? /^(?:(pdf))$/.exec(config.document.fileType) : null;
+        if (!(type && typeof type[1] === 'string') && (config.editorConfig && config.editorConfig.mode == 'view' ||
             config.document && config.document.permissions && (config.document.permissions.edit === false && !config.document.permissions.review )))
             params += "&mode=view";
-        config.document.isForm = isPdf ? config.document.isForm : false;
-        if (config.document && (config.document.isForm!==undefined))
-            params += "&isForm=" + config.document.isForm;
+
+        if (config.document) {
+            config.document.isForm = (type && typeof type[1] === 'string') ? config.document.isForm : false;
+            (config.document.isForm!==undefined) && (params += "&isForm=" + config.document.isForm);
+        }
 
         if (config.editorConfig && config.editorConfig.customization && !!config.editorConfig.customization.compactHeader)
             params += "&compact=true";
@@ -1040,20 +1055,6 @@
         if (config.document && config.document.fileType)
             params += "&fileType=" + config.document.fileType;
 
-        if (isPdf) {
-            if (config.document && config.document.directUrl)
-                params += "&directUrl=" + encodeURIComponent(config.document.directUrl);
-
-            if (config.document && config.document.key)
-                params += "&key=" + config.document.key;
-
-            if (config.document && config.document.url)
-                params += "&url=" + encodeURIComponent(config.document.url);
-
-            if (config.document && config.document.token)
-                params += "&token=" + config.document.token;
-        }
-
         return params;
     }
 
diff --git a/apps/common/checkExtendedPDF.js b/apps/common/checkExtendedPDF.js
index 5589c48732..469b8e18df 100644
--- a/apps/common/checkExtendedPDF.js
+++ b/apps/common/checkExtendedPDF.js
@@ -116,4 +116,46 @@ function downloadPartialy(url, limit, headers, callback) {
         }
     }
     xhr.send();
-}
\ No newline at end of file
+}
+
+var startCallback;
+var eventFn = function(msg) {
+    if (msg.origin !== window.parentOrigin && msg.origin !== window.location.origin && !(msg.origin==="null" && (window.parentOrigin==="file://" || window.location.origin==="file://"))) return;
+
+    var data = msg.data;
+    if (Object.prototype.toString.apply(data) !== '[object String]' || !window.JSON) {
+        return;
+    }
+    try {
+        data = window.JSON.parse(data)
+    } catch(e) {
+        data = '';
+    }
+
+    if (data && data.command==="checkParams") {
+        data = data.data || {};
+        checkExtendedPDF(data.directUrl, data.key, data.url, data.token, startCallback);
+        _unbindWindowEvents();
+    }
+};
+
+var _bindWindowEvents = function() {
+    if (window.addEventListener) {
+        window.addEventListener("message", eventFn, false)
+    } else if (window.attachEvent) {
+        window.attachEvent("onmessage", eventFn);
+    }
+};
+
+var _unbindWindowEvents = function() {
+    if (window.removeEventListener) {
+        window.removeEventListener("message", eventFn)
+    } else if (window.detachEvent) {
+        window.detachEvent("onmessage", eventFn);
+    }
+};
+
+function listenApiMsg(callback) {
+    startCallback = callback;
+    _bindWindowEvents();
+}
diff --git a/apps/documenteditor/embed/index.html b/apps/documenteditor/embed/index.html
index bddada7aa7..9242b17b78 100644
--- a/apps/documenteditor/embed/index.html
+++ b/apps/documenteditor/embed/index.html
@@ -197,10 +197,6 @@
            var params = getUrlParams(),
                lang = (params["lang"] || 'en').split(/[\-\_]/)[0],
                logo = params["headerlogo"] ? encodeUrlParam(params["headerlogo"]) : null,
-               directUrl = params["directUrl"] ? encodeUrlParam(params["directUrl"]) : null,
-               url = params["url"] ? encodeUrlParam(params["url"]) : null,
-               fileKey = params["key"] || '',
-               token = params["token"] || '',
                isForm = params["isForm"];
 
            window.frameEditorId = params["frameEditorId"];
@@ -306,7 +302,7 @@
               document.body.appendChild(script);
           }
           if (isForm===undefined) {
-              checkExtendedPDF(directUrl, fileKey, url, token, function (isform) {
+              listenApiMsg(function (isform) {
                   window.isPDFForm = !!isform;
                   startApp();
               });
diff --git a/apps/documenteditor/embed/index.html.deploy b/apps/documenteditor/embed/index.html.deploy
index feedff229f..5fd9b41c37 100644
--- a/apps/documenteditor/embed/index.html.deploy
+++ b/apps/documenteditor/embed/index.html.deploy
@@ -189,11 +189,7 @@
             var params = getUrlParams(),
                            lang = (params["lang"] || 'en').split(/[\-\_]/)[0],
                            logo = params["headerlogo"] ? encodeUrlParam(params["headerlogo"]) : null,
-                            directUrl = params["directUrl"] ? encodeUrlParam(params["directUrl"]) : null,
-                            url = params["url"] ? encodeUrlParam(params["url"]) : null,
-                            fileKey = params["key"] || '',
-                            token = params["token"] || '',
-                            isForm = params["isForm"];
+                           isForm = params["isForm"];
 
             window.frameEditorId = params["frameEditorId"];
             window.parentOrigin = params["parentOrigin"];
@@ -281,7 +277,7 @@
               document.body.appendChild(script);
           }
           if (isForm===undefined) {
-              checkExtendedPDF(directUrl, fileKey, url, token, function (isform) {
+              listenApiMsg(function (isform) {
                   window.isPDFForm = !!isform;
                   startApp();
               });
diff --git a/apps/documenteditor/embed/index_loader.html b/apps/documenteditor/embed/index_loader.html
index 971b43b8fa..b972da3666 100644
--- a/apps/documenteditor/embed/index_loader.html
+++ b/apps/documenteditor/embed/index_loader.html
@@ -237,10 +237,6 @@
                 margin = (customer !== '') ? 50 : 20,
                 loading = 'Loading...',
                 logo = params["logo"] ? ((params["logo"] !== 'none') ? ('<img src="' + encodeUrlParam(params["logo"]) + '" class="loader-logo" />') : '') : null,
-                directUrl = params["directUrl"] ? encodeUrlParam(params["directUrl"]) : null,
-                url = params["url"] ? encodeUrlParam(params["url"]) : null,
-                fileKey = params["key"] || '',
-                token = params["token"] || '',
                 isForm = params["isForm"];
 
             window.frameEditorId = params["frameEditorId"];
@@ -365,7 +361,7 @@
               document.body.appendChild(script);
           }
           if (isForm===undefined) {
-              checkExtendedPDF(directUrl, fileKey, url, token, function (isform) {
+              listenApiMsg(function (isform) {
                   window.isPDFForm = !!isform;
                   startApp();
               });
diff --git a/apps/documenteditor/embed/index_loader.html.deploy b/apps/documenteditor/embed/index_loader.html.deploy
index 39dff2ee4c..7844bb22e3 100644
--- a/apps/documenteditor/embed/index_loader.html.deploy
+++ b/apps/documenteditor/embed/index_loader.html.deploy
@@ -229,10 +229,6 @@
                 margin = (customer !== '') ? 50 : 20,
                 loading = 'Loading...',
                 logo = params["logo"] ? ((params["logo"] !== 'none') ? ('<img src="' + encodeUrlParam(params["logo"]) + '" class="loader-logo" />') : '') : null,
-                directUrl = params["directUrl"] ? encodeUrlParam(params["directUrl"]) : null,
-                url = params["url"] ? encodeUrlParam(params["url"]) : null,
-                fileKey = params["key"] || '',
-                token = params["token"] || '',
                 isForm = params["isForm"];
 
             window.frameEditorId = params["frameEditorId"];
@@ -342,7 +338,7 @@
               document.body.appendChild(script);
           }
           if (isForm===undefined) {
-              checkExtendedPDF(directUrl, fileKey, url, token, function (isform) {
+              listenApiMsg(function (isform) {
                   window.isPDFForm = !!isform;
                   startApp();
               });
diff --git a/apps/documenteditor/mobile/src/app.js b/apps/documenteditor/mobile/src/app.js
index 8e0d2e2624..cadbd22776 100644
--- a/apps/documenteditor/mobile/src/app.js
+++ b/apps/documenteditor/mobile/src/app.js
@@ -51,12 +51,8 @@ const startApp = () => {
 
 const params = getUrlParams(),
       isForm = params["isForm"];
-if (isForm===undefined && checkExtendedPDF) {
-    const directUrl = params["directUrl"] ? encodeUrlParam(params["directUrl"]) : null,
-        url = params["url"] ? encodeUrlParam(params["url"]) : null,
-        fileKey = params["key"] || '',
-        token = params["token"] || '';
-    checkExtendedPDF(directUrl, fileKey, url, token, function (isform) {
+if (isForm===undefined && listenApiMsg) {
+    listenApiMsg(function (isform) {
         window.isPDFForm = !!isform;
         startApp();
     });
diff --git a/apps/pdfeditor/main/index.html b/apps/pdfeditor/main/index.html
index 5069292184..25ecbface6 100644
--- a/apps/pdfeditor/main/index.html
+++ b/apps/pdfeditor/main/index.html
@@ -257,10 +257,6 @@
             lang = (params["lang"] || 'en').split(/[\-\_]/)[0],
             logo = params["headerlogo"] ? encodeUrlParam(params["headerlogo"]) : null,
             logoDark = params["headerlogodark"] ? encodeUrlParam(params["headerlogodark"]) : null,
-            directUrl = params["directUrl"] ? encodeUrlParam(params["directUrl"]) : null,
-            url = params["url"] ? encodeUrlParam(params["url"]) : null,
-            fileKey = params["key"] || '',
-            token = params["token"] || '',
             isForm = params["isForm"];
 
         window.frameEditorId = params["frameEditorId"];
@@ -382,7 +378,7 @@
         document.body.appendChild(script);
     }
     if (isForm===undefined) {
-        checkExtendedPDF(directUrl, fileKey, url, token, function (isform) {
+        listenApiMsg(function (isform) {
             window.isPDFForm = !!isform;
             startApp();
         });
diff --git a/apps/pdfeditor/main/index.html.deploy b/apps/pdfeditor/main/index.html.deploy
index 71f3660be7..812545605f 100644
--- a/apps/pdfeditor/main/index.html.deploy
+++ b/apps/pdfeditor/main/index.html.deploy
@@ -230,10 +230,6 @@
             lang = (params["lang"] || 'en').split(/[\-\_]/)[0],
             logo = params["headerlogo"] ? encodeUrlParam(params["headerlogo"]) : null,
             logoDark = params["headerlogodark"] ? encodeUrlParam(params["headerlogodark"]) : null,
-            directUrl = params["directUrl"] ? encodeUrlParam(params["directUrl"]) : null,
-            url = params["url"] ? encodeUrlParam(params["url"]) : null,
-            fileKey = params["key"] || '',
-            token = params["token"] || '',
             isForm = params["isForm"];
 
         window.frameEditorId = params["frameEditorId"];
@@ -340,7 +336,7 @@
             document.body.appendChild(script);
         }
         if (isForm===undefined) {
-            checkExtendedPDF(directUrl, fileKey, url, token, function (isform) {
+            listenApiMsg(function (isform) {
                 window.isPDFForm = !!isform;
                 startApp();
             });
diff --git a/apps/pdfeditor/main/index_loader.html b/apps/pdfeditor/main/index_loader.html
index 559f7313de..738e9f61b8 100644
--- a/apps/pdfeditor/main/index_loader.html
+++ b/apps/pdfeditor/main/index_loader.html
@@ -220,10 +220,6 @@
             margin = (customer !== '') ? 50 : 20,
             loading = 'Loading...',
             logo = params["logo"] ? ((params["logo"] !== 'none') ? ('<img src="' + encodeUrlParam(params["logo"]) + '" class="loader-logo" />') : '') : null,
-            directUrl = params["directUrl"] ? encodeUrlParam(params["directUrl"]) : null,
-            url = params["url"] ? encodeUrlParam(params["url"]) : null,
-            fileKey = params["key"] || '',
-            token = params["token"] || '',
             isForm = params["isForm"];
 
         window.frameEditorId = params["frameEditorId"];
@@ -315,7 +311,7 @@
         document.body.appendChild(script);
     }
     if (isForm===undefined) {
-        checkExtendedPDF(directUrl, fileKey, url, token, function (isform) {
+        listenApiMsg(function (isform) {
             window.isPDFForm = !!isform;
             startApp();
         });
diff --git a/apps/pdfeditor/main/index_loader.html.deploy b/apps/pdfeditor/main/index_loader.html.deploy
index e9c3e2c14a..1ac39891cc 100644
--- a/apps/pdfeditor/main/index_loader.html.deploy
+++ b/apps/pdfeditor/main/index_loader.html.deploy
@@ -242,10 +242,6 @@
             margin = (customer !== '') ? 50 : 20,
             loading = 'Loading...',
             logo = params["logo"] ? ((params["logo"] !== 'none') ? ('<img src="' + encodeUrlParam(params["logo"]) + '" class="loader-logo" />') : '') : null,
-            directUrl = params["directUrl"] ? encodeUrlParam(params["directUrl"]) : null,
-            url = params["url"] ? encodeUrlParam(params["url"]) : null,
-            fileKey = params["key"] || '',
-            token = params["token"] || '',
             isForm = params["isForm"];
 
         window.frameEditorId = params["frameEditorId"];
@@ -335,7 +331,7 @@
             document.body.appendChild(script);
         }
         if (isForm===undefined) {
-            checkExtendedPDF(directUrl, fileKey, url, token, function (isform) {
+            listenApiMsg(function (isform) {
                 window.isPDFForm = !!isform;
                 startApp();
             });