diff --git a/.markdownlint.json b/.markdownlint.json
new file mode 100644
index 000000000..3a882a7cc
--- /dev/null
+++ b/.markdownlint.json
@@ -0,0 +1,6 @@
+{
+  "MD013": false,  // Disables the line length rule completely
+  // Or to customize it:
+  "MD013": { "line_length": 120 }  // Changes max line length to 120
+}
+
diff --git a/README.md b/README.md
index d3504028f..16cad2803 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,13 @@ Framework for QA of `onlyoffice-documentbuilder`
   rake run_test_on_win
 ```
 
+## Conversion test coverage matrix
+
+| Input format | Output format |       |      |      |      |      |     |      |     |     |     |      |     |     |
+|--------------|---------------|-------|------|------|------|------|-----|------|-----|-----|-----|------|-----|-----|
+|              | docx          | docxf | docm | dotm | dotx | epub | fb2 | html | odt | ott | pdf | pdfa | rtf | txt |
+| docx         | *             | *     | *    | *    | *    | *    | *   | *    | *   | *   | *   | *    | *   | *   |
+
 ## Project Information
 
 [Official website](https://www.onlyoffice.com)
diff --git a/js/conversion/docx/docx_to_docm.js b/js/conversion/docx/docx_to_docm.js
new file mode 100644
index 000000000..46c383a20
--- /dev/null
+++ b/js/conversion/docx/docx_to_docm.js
@@ -0,0 +1,6 @@
+builder.CreateFile("docx");
+var oDocument = Api.GetDocument();
+var oParagraph = oDocument.GetElement(0);
+oParagraph.AddText("This is just a sample text. Nothing special.");
+builder.SaveFile("docm", "AddText.docm");
+builder.CloseFile();
diff --git a/js/conversion/docx/docx_to_docxf.js b/js/conversion/docx/docx_to_docxf.js
new file mode 100644
index 000000000..47a1f27ca
--- /dev/null
+++ b/js/conversion/docx/docx_to_docxf.js
@@ -0,0 +1,6 @@
+builder.CreateFile("docx");
+var oDocument = Api.GetDocument();
+var oParagraph = oDocument.GetElement(0);
+oParagraph.AddText("This is just a sample text. Nothing special.");
+builder.SaveFile("docxf", "AddText.docxf");
+builder.CloseFile();
diff --git a/js/conversion/docx/docx_to_dotm.js b/js/conversion/docx/docx_to_dotm.js
new file mode 100644
index 000000000..114c33ba4
--- /dev/null
+++ b/js/conversion/docx/docx_to_dotm.js
@@ -0,0 +1,6 @@
+builder.CreateFile("docx");
+var oDocument = Api.GetDocument();
+var oParagraph = oDocument.GetElement(0);
+oParagraph.AddText("This is just a sample text. Nothing special.");
+builder.SaveFile("dotm", "AddText.dotm");
+builder.CloseFile();
diff --git a/js/conversion/docx/docx_to_dotx.js b/js/conversion/docx/docx_to_dotx.js
new file mode 100644
index 000000000..8ec5229fb
--- /dev/null
+++ b/js/conversion/docx/docx_to_dotx.js
@@ -0,0 +1,6 @@
+builder.CreateFile("docx");
+var oDocument = Api.GetDocument();
+var oParagraph = oDocument.GetElement(0);
+oParagraph.AddText("This is just a sample text. Nothing special.");
+builder.SaveFile("dotx", "AddText.dotx");
+builder.CloseFile();
diff --git a/js/conversion/docx/docx_to_epub.js b/js/conversion/docx/docx_to_epub.js
new file mode 100644
index 000000000..9e667a2fb
--- /dev/null
+++ b/js/conversion/docx/docx_to_epub.js
@@ -0,0 +1,6 @@
+builder.CreateFile("docx");
+var oDocument = Api.GetDocument();
+var oParagraph = oDocument.GetElement(0);
+oParagraph.AddText("This is just a sample text. Nothing special.");
+builder.SaveFile("epub", "AddText.epub");
+builder.CloseFile();
diff --git a/js/conversion/docx/docx_to_fb2.js b/js/conversion/docx/docx_to_fb2.js
new file mode 100644
index 000000000..853abd567
--- /dev/null
+++ b/js/conversion/docx/docx_to_fb2.js
@@ -0,0 +1,6 @@
+builder.CreateFile("docx");
+var oDocument = Api.GetDocument();
+var oParagraph = oDocument.GetElement(0);
+oParagraph.AddText("This is just a sample text. Nothing special.");
+builder.SaveFile("fb2", "AddText.fb2");
+builder.CloseFile();
diff --git a/js/conversion/docx/docx_to_html.js b/js/conversion/docx/docx_to_html.js
new file mode 100644
index 000000000..9980e6bb2
--- /dev/null
+++ b/js/conversion/docx/docx_to_html.js
@@ -0,0 +1,6 @@
+builder.CreateFile("docx");
+var oDocument = Api.GetDocument();
+var oParagraph = oDocument.GetElement(0);
+oParagraph.AddText("This is just a sample text. Nothing special.");
+builder.SaveFile("html", "AddText.html");
+builder.CloseFile();
diff --git a/js/conversion/docx/docx_to_ott.js b/js/conversion/docx/docx_to_ott.js
new file mode 100644
index 000000000..4b29f20c0
--- /dev/null
+++ b/js/conversion/docx/docx_to_ott.js
@@ -0,0 +1,6 @@
+builder.CreateFile("docx");
+var oDocument = Api.GetDocument();
+var oParagraph = oDocument.GetElement(0);
+oParagraph.AddText("This is just a sample text. Nothing special.");
+builder.SaveFile("ott", "AddText.ott");
+builder.CloseFile();
diff --git a/js/conversion/docx/docx_to_pdfa.js b/js/conversion/docx/docx_to_pdfa.js
new file mode 100644
index 000000000..b01ca63d0
--- /dev/null
+++ b/js/conversion/docx/docx_to_pdfa.js
@@ -0,0 +1,6 @@
+builder.CreateFile("docx");
+var oDocument = Api.GetDocument();
+var oParagraph = oDocument.GetElement(0);
+oParagraph.AddText("This is just a sample text. Nothing special.");
+builder.SaveFile("pdfa", "AddText.pdfa");
+builder.CloseFile();
diff --git a/lib/doc_builder_testing/doc_builder_helper.rb b/lib/doc_builder_testing/doc_builder_helper.rb
index 38d1580fe..d06349223 100644
--- a/lib/doc_builder_testing/doc_builder_helper.rb
+++ b/lib/doc_builder_testing/doc_builder_helper.rb
@@ -2,6 +2,7 @@
 
 # Helpers method for document builder
 module DocBuilderHelper
+  # Actual verison: 7.2.2
   # [Hash] list of minimal file size by formats
   MINIMAL_FILESIZE = { '.odt' => 3656,
                        '.rtf' => 976,
@@ -9,7 +10,12 @@ module DocBuilderHelper
                        '.txt' => 5,
                        '.odp' => 3933,
                        '.ods' => 3351,
-                       '.csv' => 1 }.freeze
+                       '.csv' => 1,
+                       '.epub' => 1758,
+                       '.fb2' => 498,
+                       '.ott' => 272,
+                       '.html' => 4234,
+                       '.pdfa' => 4999 }.freeze
 
   # Parse file
   # @param path [String] file to path
diff --git a/spec/docx/conversion/docx_conversion_spec.rb b/spec/docx/conversion/docx_conversion_spec.rb
index 4b2bc075f..202c30965 100644
--- a/spec/docx/conversion/docx_conversion_spec.rb
+++ b/spec/docx/conversion/docx_conversion_spec.rb
@@ -1,29 +1,105 @@
 # frozen_string_literal: true
 
 require 'spec_helper'
-describe 'Conversion tests from Docx' do
-  it 'Conversion | Docx to Docx', :critical do
-    docx = builder.build_and_parse('js/conversion/docx/docx_to_docx.js')
-    expect(docx).to be_with_data
+describe 'Conversion tests from docx' do
+  it 'Conversion | docx to docx' do
+    parsed_output_file = builder.build_and_parse('js/conversion/docx/docx_to_docx.js')
+    expect(parsed_output_file).to be_with_data
   end
 
-  it 'Conversion | Docx to Odt' do
+  it 'Conversion | docx to docxf' do
+    parsed_output_file = builder.build_and_parse('js/conversion/docx/docx_to_docxf.js')
+    ext = builder.recognize_output_format(File.read('js/conversion/docx/docx_to_docxf.js'))
+    expect(File.extname(parsed_output_file.file_path).strip.downcase[1..]).to eq(ext)
+    expect(parsed_output_file).to be_with_data
+  end
+
+  it 'Conversion | docx to docm' do
+    parsed_output_file = builder.build_and_parse('js/conversion/docx/docx_to_docm.js')
+    ext = builder.recognize_output_format(File.read('js/conversion/docx/docx_to_docm.js'))
+    expect(File.extname(parsed_output_file.file_path).strip.downcase[1..]).to eq(ext)
+    expect(parsed_output_file).to be_with_data
+  end
+
+  it 'Conversion | docx to dotx' do
+    parsed_output_file = builder.build_and_parse('js/conversion/docx/docx_to_dotx.js')
+    ext = builder.recognize_output_format(File.read('js/conversion/docx/docx_to_dotx.js'))
+    expect(File.extname(parsed_output_file.file_path).strip.downcase[1..]).to eq(ext)
+    expect(parsed_output_file).to be_with_data
+  end
+
+  it 'Conversion | docx to dotm' do
+    parsed_output_file = builder.build_and_parse('js/conversion/docx/docx_to_dotm.js')
+    ext = builder.recognize_output_format(File.read('js/conversion/docx/docx_to_dotm.js'))
+    expect(File.extname(parsed_output_file.file_path).strip.downcase[1..]).to eq(ext)
+    expect(parsed_output_file).to be_with_data
+  end
+
+  it 'Conversion | docx to pdf' do
+    parsed_output_file = builder.build_and_parse('js/conversion/docx/docx_to_pdf.js')
+    ext = builder.recognize_output_format(File.read('js/conversion/docx/docx_to_pdf.js'))
+    expect(File.extname(parsed_output_file.file_path).strip.downcase[1..]).to eq(ext)
+    expect(parsed_output_file.pages[0][:text]).to eq('This is just a sample text. Nothing special.')
+  end
+
+  it 'Conversion | docx to epub' do
+    output_file = builder.build_file('js/conversion/docx/docx_to_epub.js')
+    ext = builder.recognize_output_format(File.read('js/conversion/docx/docx_to_epub.js'))
+    expect(File.extname(output_file).strip.downcase[1..]).to eq(ext)
+    expect(builder).not_to be_file_empty(output_file)
+  end
+
+  it 'Conversion | docx to fb2' do
+    output_file = builder.build_file('js/conversion/docx/docx_to_fb2.js')
+    ext = builder.recognize_output_format(File.read('js/conversion/docx/docx_to_fb2.js'))
+    expect(File.extname(output_file).strip.downcase[1..]).to eq(ext)
+    expect(builder).not_to be_file_empty(output_file)
+  end
+
+  it 'Conversion | docx to html' do
+    output_file = builder.build_file('js/conversion/docx/docx_to_html.js')
+    ext = builder.recognize_output_format(File.read('js/conversion/docx/docx_to_html.js'))
+    expect(File.extname(output_file).strip.downcase[1..]).to eq(ext)
+    expect(builder).not_to be_file_empty(output_file)
+  end
+
+  it 'Conversion | docx to ott' do
+    output_file = builder.build_file('js/conversion/docx/docx_to_ott.js')
+    ext = builder.recognize_output_format(File.read('js/conversion/docx/docx_to_ott.js'))
+    expect(File.extname(output_file).strip.downcase[1..]).to eq(ext)
+    expect(builder).not_to be_file_empty(output_file)
+  end
+
+  it 'Conversion | docx to odt' do
     output_file = builder.build_file('js/conversion/docx/docx_to_odt.js')
+    ext = builder.recognize_output_format(File.read('js/conversion/docx/docx_to_odt.js'))
+    expect(File.extname(output_file).strip.downcase[1..]).to eq(ext)
     expect(builder).not_to be_file_empty(output_file)
   end
 
-  it 'Conversion | Docx to Pdf', :critical do
+  it 'Conversion | Docx to Pdf' do
     output_file = builder.build_file('js/conversion/docx/docx_to_pdf.js')
     expect(builder).not_to be_file_empty(output_file)
   end
 
-  it 'Conversion | Docx to Rtf', :critical do
+  it 'Conversion | docx to pdfa' do
+    output_file = builder.build_file('js/conversion/docx/docx_to_pdfa.js')
+    ext = builder.recognize_output_format(File.read('js/conversion/docx/docx_to_pdfa.js'))
+    expect(File.extname(output_file).strip.downcase[1..]).to eq(ext)
+    expect(builder).not_to be_file_empty(output_file)
+  end
+
+  it 'Conversion | docx to rtf' do
     output_file = builder.build_file('js/conversion/docx/docx_to_rtf.js')
+    ext = builder.recognize_output_format(File.read('js/conversion/docx/docx_to_rtf.js'))
+    expect(File.extname(output_file).strip.downcase[1..]).to eq(ext)
     expect(builder).not_to be_file_empty(output_file)
   end
 
-  it 'Conversion | Docx to Txt', :critical do
+  it 'Conversion | Docx to Txt' do
     output_file = builder.build_file('js/conversion/docx/docx_to_txt.js')
+    ext = builder.recognize_output_format(File.read('js/conversion/docx/docx_to_txt.js'))
+    expect(File.extname(output_file).strip.downcase[1..]).to eq(ext)
     expect(builder).not_to be_file_empty(output_file)
   end
 end