diff --git a/e-invoicing-domain/src/main/kotlin/net/codinux/invoicing/converter/EInvoiceConverter.kt b/e-invoicing-domain/src/main/kotlin/net/codinux/invoicing/converter/EInvoiceConverter.kt
index 2edb32a..db5f3a5 100644
--- a/e-invoicing-domain/src/main/kotlin/net/codinux/invoicing/converter/EInvoiceConverter.kt
+++ b/e-invoicing-domain/src/main/kotlin/net/codinux/invoicing/converter/EInvoiceConverter.kt
@@ -3,14 +3,36 @@ package net.codinux.invoicing.converter
 import net.codinux.invoicing.creation.EInvoiceCreator
 import net.codinux.invoicing.model.Invoice
 import org.mustangproject.CII.CIIToUBL
+import org.mustangproject.ZUGFeRD.ZUGFeRDVisualizer
 import java.io.File
 
 class EInvoiceConverter {
 
+    fun convertInvoiceToHtml(invoice: Invoice, outputFile: File, language: ZUGFeRDVisualizer.Language = ZUGFeRDVisualizer.Language.DE) =
+        convertInvoiceToHtml(createXRechnungXml(invoice), outputFile, language)
+
+    fun convertInvoiceToHtml(invoiceXml: String, outputFile: File, language: ZUGFeRDVisualizer.Language = ZUGFeRDVisualizer.Language.DE): String {
+        val xmlFile = File.createTempFile("Zugferd", ".xml")
+            .also { it.writeText(invoiceXml) }
+
+        val visualizer = ZUGFeRDVisualizer()
+
+        val html = visualizer.visualize(xmlFile.absolutePath, language)
+
+        outputFile.writeText(html)
+        copyResource("xrechnung-viewer.css", outputFile, ".css")
+        copyResource("xrechnung-viewer.js", outputFile, ".js")
+
+        xmlFile.delete()
+
+        return html
+    }
+
+
     /**
      * Converts a CII (Cross Industry Invoice) invoice, e.g. a Zugferd or Factur-X invoice, to UBL (Universal Business Language).
      */
-    fun convertCiiToUbl(invoice: Invoice) = convertCiiToUbl(EInvoiceCreator().createXRechnungXml(invoice))
+    fun convertCiiToUbl(invoice: Invoice) = convertCiiToUbl(createXRechnungXml(invoice))
 
     /**
      * Converts a CII (Cross Industry Invoice) invoice, e.g. a Zugferd or Factur-X invoice, to UBL (Universal Business Language).
@@ -38,4 +60,14 @@ class EInvoiceConverter {
         val cii2Ubl = CIIToUBL()
         cii2Ubl.convert(xmlFile, outputFile)
     }
+
+
+    private fun createXRechnungXml(invoice: Invoice): String = EInvoiceCreator().createXRechnungXml(invoice)
+
+    private fun copyResource(resourceName: String, outputFile: File, outputFileExtension: String) {
+        javaClass.classLoader.getResourceAsStream(resourceName).use {
+            it?.copyTo(File(outputFile.parentFile, outputFile.nameWithoutExtension + outputFileExtension).outputStream())
+        }
+    }
+
 }
\ No newline at end of file
diff --git a/e-invoicing-domain/src/main/kotlin/net/codinux/invoicing/creation/EInvoiceCreator.kt b/e-invoicing-domain/src/main/kotlin/net/codinux/invoicing/creation/EInvoiceCreator.kt
index 4d109d1..4d9e117 100644
--- a/e-invoicing-domain/src/main/kotlin/net/codinux/invoicing/creation/EInvoiceCreator.kt
+++ b/e-invoicing-domain/src/main/kotlin/net/codinux/invoicing/creation/EInvoiceCreator.kt
@@ -52,33 +52,6 @@ class EInvoiceCreator(
         exporter.export(outputFile.outputStream())
     }
 
-    // extract to EInvoiceConverter?
-    fun convertInvoiceToHtml(invoice: Invoice, outputFile: File, language: ZUGFeRDVisualizer.Language = ZUGFeRDVisualizer.Language.DE) =
-        convertInvoiceToHtml(createXRechnungXml(invoice), outputFile, language)
-
-    fun convertInvoiceToHtml(invoiceXml: String, outputFile: File, language: ZUGFeRDVisualizer.Language = ZUGFeRDVisualizer.Language.DE): String {
-        val xmlFile = File.createTempFile("Zugferd", ".xml")
-            .also { it.writeText(invoiceXml) }
-
-        val visualizer = ZUGFeRDVisualizer()
-
-        val html = visualizer.visualize(xmlFile.absolutePath, language)
-
-        outputFile.writeText(html)
-        copyResource("xrechnung-viewer.css", outputFile, ".css")
-        copyResource("xrechnung-viewer.js", outputFile, ".js")
-
-        xmlFile.delete()
-
-        return html
-    }
-
-    private fun copyResource(resourceName: String, outputFile: File, outputFileExtension: String) {
-        javaClass.classLoader.getResourceAsStream(resourceName).use {
-            it?.copyTo(File(outputFile.parentFile, outputFile.nameWithoutExtension + outputFileExtension).outputStream())
-        }
-    }
-
 
     private fun createXml(provider: IXMLProvider, invoice: Invoice): String {
         val transaction = mapper.mapToTransaction(invoice)
diff --git a/e-invoicing-domain/src/test/kotlin/net/codinux/invoicing/converter/EInvoiceConverterTest.kt b/e-invoicing-domain/src/test/kotlin/net/codinux/invoicing/converter/EInvoiceConverterTest.kt
index a722ffe..2c31356 100644
--- a/e-invoicing-domain/src/test/kotlin/net/codinux/invoicing/converter/EInvoiceConverterTest.kt
+++ b/e-invoicing-domain/src/test/kotlin/net/codinux/invoicing/converter/EInvoiceConverterTest.kt
@@ -3,6 +3,7 @@ package net.codinux.invoicing.converter
 import assertk.assertThat
 import assertk.assertions.isNotEmpty
 import net.codinux.invoicing.test.DataGenerator
+import java.io.File
 import kotlin.test.Test
 
 class EInvoiceConverterTest {
@@ -10,6 +11,16 @@ class EInvoiceConverterTest {
     private val underTest = EInvoiceConverter()
 
 
+    @Test
+    fun convertInvoiceToHtml() {
+        val invoice = createInvoice()
+        val testFile = File.createTempFile("Zugferd", ".html")
+
+        val result = underTest.convertInvoiceToHtml(invoice, testFile)
+
+        assertThat(result).isNotEmpty()
+    }
+
     @Test
     fun convertCiiToUbl() {
         val invoice = createInvoice()
diff --git a/e-invoicing-domain/src/test/kotlin/net/codinux/invoicing/creation/EInvoiceCreatorTest.kt b/e-invoicing-domain/src/test/kotlin/net/codinux/invoicing/creation/EInvoiceCreatorTest.kt
index 5ceae93..1beb989 100644
--- a/e-invoicing-domain/src/test/kotlin/net/codinux/invoicing/creation/EInvoiceCreatorTest.kt
+++ b/e-invoicing-domain/src/test/kotlin/net/codinux/invoicing/creation/EInvoiceCreatorTest.kt
@@ -1,7 +1,5 @@
 package net.codinux.invoicing.creation
 
-import assertk.assertThat
-import assertk.assertions.isNotEmpty
 import net.codinux.invoicing.test.DataGenerator
 import net.codinux.invoicing.test.InvoiceAsserter
 import org.mustangproject.ZUGFeRD.ZUGFeRDInvoiceImporter
@@ -44,16 +42,6 @@ class EInvoiceCreatorTest {
         assertInvoiceXml(xml)
     }
 
-    @Test
-    fun convertInvoiceToHtml() {
-        val invoice = createInvoice()
-        val testFile = File.createTempFile("Zugferd", ".html")
-
-        val result = underTest.convertInvoiceToHtml(invoice, testFile)
-
-        assertThat(result).isNotEmpty()
-    }
-
 
     private fun createInvoice() = DataGenerator.createInvoice()