diff --git a/share/manifest b/share/manifest
index abffd73..962e4fe 100644
--- a/share/manifest
+++ b/share/manifest
@@ -42,7 +42,7 @@ new pdf2htmlEX.Viewer('pdf-main');
 <div id="pdf-outline">
 """
 
-$outlines
+$outline
 
 """
 </div>
diff --git a/src/HTMLRenderer/HTMLRenderer.h b/src/HTMLRenderer/HTMLRenderer.h
index 4b162c0..087cae9 100644
--- a/src/HTMLRenderer/HTMLRenderer.h
+++ b/src/HTMLRenderer/HTMLRenderer.h
@@ -434,7 +434,7 @@ class HTMLRenderer : public OutputDev
         struct {
             std::ofstream fs;
             std::string path;
-        } f_pages, f_css, f_outlines;
+        } f_outline, f_pages, f_css;
 
         static const std::string MANIFEST_FILENAME;
 };
diff --git a/src/HTMLRenderer/general.cc b/src/HTMLRenderer/general.cc
index 932cc1e..a81ed09 100644
--- a/src/HTMLRenderer/general.cc
+++ b/src/HTMLRenderer/general.cc
@@ -294,20 +294,41 @@ void HTMLRenderer::pre_process(PDFDoc * doc)
         if(param->single_html && (!param->split_pages))
             tmp_files.add((char*)fn);
 
-        f_css.path = (char*)fn,
+        f_css.path = (char*)fn;
         f_css.fs.open(f_css.path, ofstream::binary);
         if(!f_css.fs)
             throw string("Cannot open ") + (char*)fn + " for writing";
         set_stream_flags(f_css.fs);
     }
 
+    {
+        /*
+         * The logic for outline is similar to css
+         */
+
+        auto fn = (param->single_html && (!param->split_pages))
+            ? str_fmt("%s/__outline", param->tmp_dir.c_str())
+            : str_fmt("%s/%s", param->dest_dir.c_str(), param->outline_filename.c_str());
+
+        if(param->single_html && (!param->split_pages))
+            tmp_files.add((char*)fn);
+
+        f_outline.path = (char*)fn;
+        f_outline.fs.open(f_outline.path, ofstream::binary);
+        if(!f_outline.fs)
+            throw string("Cannot open") + (char*)fn + " for writing";
+
+        // might not be necessary
+        set_stream_flags(f_outline.fs);
+    }
+
     // if split-pages is specified, open & close the file in the process loop
     // if not, open the file here:
     if(!param->split_pages)
     {
         /*
          * If single-html
-         * we have to keep the html file (for page) into a temporary place
+         * we have to keep the html file for pages into a temporary place
          * because we'll have to embed css before it
          *
          * Otherwise just generate it 
@@ -326,6 +347,7 @@ void HTMLRenderer::pre_process(PDFDoc * doc)
 void HTMLRenderer::post_process()
 {
     // close files
+    f_outline.fs.close();
     f_pages.fs.close(); 
     f_css.fs.close();
 
@@ -379,6 +401,13 @@ void HTMLRenderer::post_process()
             {
                 embed_file(output, f_css.path, ".css", false);
             }
+            else if (line == "$outline")
+            {
+                ifstream fin(f_outline.path, ifstream::binary);
+                if(!fin)
+                    throw "Cannot open read the pages";
+                output << fin.rdbuf();
+            }
             else if (line == "$pages")
             {
                 ifstream fin(f_pages.path, ifstream::binary);
diff --git a/src/Param.h b/src/Param.h
index 2d22396..2a49ddd 100644
--- a/src/Param.h
+++ b/src/Param.h
@@ -63,6 +63,7 @@ struct Param
      * Output
      */
     std::string css_filename;
+    std::string outline_filename;
 
     /*
      * Debug
diff --git a/src/pdf2htmlEX.cc b/src/pdf2htmlEX.cc
index 162ffea..b337871 100644
--- a/src/pdf2htmlEX.cc
+++ b/src/pdf2htmlEX.cc
@@ -101,6 +101,7 @@ void parse_options (int argc, char **argv)
         .add("font-format", &param.font_format, "opentype", "format for extracted font files")
         .add("external-hint-tool", &param.external_hint_tool, "", "external tool for hintting fonts.(overrides --auto-hint)")
         .add("css-filename", &param.css_filename, "", "Specify the file name of the generated css file")
+        .add("outline-filename", &param.outline_filename, "", "Specify the file name of the generated outline file")
 
         .add("debug", &param.debug, 0, "output debug information")
         .add("clean-tmp", &param.clean_tmp, 1, "clean temporary files after processing")
@@ -202,7 +203,7 @@ int main(int argc, char **argv)
         param.first_page = min<int>(max<int>(param.first_page, 1), doc->getNumPages());
         param.last_page = min<int>(max<int>(param.last_page, param.first_page), doc->getNumPages());
 
-        if(param.output_filename == "")
+        if(param.output_filename.empty())
         {
             const string s = get_filename(param.input_filename);
 
@@ -223,7 +224,7 @@ int main(int argc, char **argv)
                 
             }
         }
-        if(param.css_filename == "")
+        if(param.css_filename.empty())
         {
             const string s = get_filename(param.input_filename);
 
@@ -237,6 +238,21 @@ int main(int argc, char **argv)
                     param.css_filename = s + ".css";
             }
         }
+        if(param.outline_filename.empty())
+        {
+            const string s = get_filename(param.input_filename);
+
+            if(get_suffix(param.input_filename) == ".pdf")
+            {
+                param.outline_filename = s.substr(0, s.size() - 4) + ".outline";
+            }
+            else
+            {
+                if(!param.split_pages)
+                    param.outline_filename = s + ".outline";
+            }
+
+        }
 
         HTMLRenderer * htmlOut = new HTMLRenderer(&param);
         htmlOut->process(doc);