diff --git a/scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitDiffCommand.java b/scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitDiffCommand.java
index 1ac64c1b5e..d6203f2a1b 100644
--- a/scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitDiffCommand.java
+++ b/scm-plugins/scm-git-plugin/src/main/java/sonia/scm/repository/spi/GitDiffCommand.java
@@ -33,13 +33,18 @@ package sonia.scm.repository.spi;
 
 import org.eclipse.jgit.diff.DiffEntry;
 import org.eclipse.jgit.diff.DiffFormatter;
+import org.eclipse.jgit.util.QuotedString;
 import sonia.scm.repository.Repository;
 import sonia.scm.repository.api.DiffCommandBuilder;
 
+import java.io.BufferedOutputStream;
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.io.OutputStream;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
 
 /**
- *
  * @author Sebastian Sdorra
  */
 public class GitDiffCommand extends AbstractGitCommand implements DiffCommand {
@@ -51,12 +56,12 @@ public class GitDiffCommand extends AbstractGitCommand implements DiffCommand {
   @Override
   public DiffCommandBuilder.OutputStreamConsumer getDiffResult(DiffCommandRequest request) throws IOException {
     @SuppressWarnings("squid:S2095") // repository will be closed with the RepositoryService
-    org.eclipse.jgit.lib.Repository repository = open();
+      org.eclipse.jgit.lib.Repository repository = open();
 
     Differ.Diff diff = Differ.diff(repository, request);
 
     return output -> {
-      try (DiffFormatter formatter = new DiffFormatter(output)) {
+      try (DiffFormatter formatter = new DiffFormatter(new DequoteOutputStream(output))) {
         formatter.setRepository(repository);
 
         for (DiffEntry e : diff.getEntries()) {
@@ -70,4 +75,115 @@ public class GitDiffCommand extends AbstractGitCommand implements DiffCommand {
     };
   }
 
+  static class DequoteOutputStream extends OutputStream {
+
+    private static final String[] DEQUOTE_STARTS = {
+      "--- ",
+      "+++ ",
+      "diff --git "
+    };
+
+    private final OutputStream target;
+
+    private boolean afterNL = true;
+    private boolean writeToBuffer = false;
+    private int numberOfPotentialBeginning = -1;
+    private int potentialBeginningCharCount = 0;
+    private boolean inPotentialQuotedLine = false;
+
+    private final ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+
+    DequoteOutputStream(OutputStream target) {
+      this.target = new BufferedOutputStream(target);
+    }
+
+    @Override
+    public void write(int i) throws IOException {
+      if (i == (int) '\n') {
+        handleNewLine(i);
+        return;
+      }
+
+      if (afterNL) {
+        afterNL = false;
+        if (foundPotentialBeginning(i)) {
+          return;
+        }
+        numberOfPotentialBeginning = -1;
+      }
+
+      if (inPotentialQuotedLine && i == '"') {
+        handleQuote();
+        return;
+      }
+
+      if (numberOfPotentialBeginning > -1 && checkForFurtherBeginning(i)) {
+        return;
+      }
+
+      if (writeToBuffer) {
+        buffer.write(i);
+      } else {
+        target.write(i);
+      }
+    }
+
+    private boolean checkForFurtherBeginning(int i) throws IOException {
+      if (i == DEQUOTE_STARTS[numberOfPotentialBeginning].charAt(potentialBeginningCharCount)) {
+        if (potentialBeginningCharCount + 1 < DEQUOTE_STARTS[numberOfPotentialBeginning].length()) {
+          ++potentialBeginningCharCount;
+        } else {
+          inPotentialQuotedLine = true;
+        }
+        target.write(i);
+        return true;
+      } else {
+        numberOfPotentialBeginning = -1;
+      }
+      return false;
+    }
+
+    private boolean foundPotentialBeginning(int i) throws IOException {
+      for (int n = 0; n < DEQUOTE_STARTS.length; ++n) {
+        if (i == DEQUOTE_STARTS[n].charAt(0)) {
+          numberOfPotentialBeginning = n;
+          potentialBeginningCharCount = 1;
+          target.write(i);
+          return true;
+        }
+      }
+      return false;
+    }
+
+    private void handleQuote() throws IOException {
+      if (writeToBuffer) {
+        buffer.write('"');
+        dequoteBuffer();
+      } else {
+        writeToBuffer = true;
+        buffer.reset();
+        buffer.write('"');
+      }
+    }
+
+    private void handleNewLine(int i) throws IOException {
+      afterNL = true;
+      if (writeToBuffer) {
+        dequoteBuffer();
+      }
+      target.write(i);
+    }
+
+    private void dequoteBuffer() throws IOException {
+      byte[] bytes = buffer.toByteArray();
+      String dequote = QuotedString.GIT_PATH.dequote(bytes, 0, bytes.length);
+      target.write(dequote.getBytes(UTF_8));
+      writeToBuffer = false;
+    }
+
+    @Override
+    public void flush() throws IOException {
+      target.flush();
+    }
+  }
 }
diff --git a/scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/GitDiffCommand_DequoteOutputStreamTest.java b/scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/GitDiffCommand_DequoteOutputStreamTest.java
new file mode 100644
index 0000000000..8eaab4fc16
--- /dev/null
+++ b/scm-plugins/scm-git-plugin/src/test/java/sonia/scm/repository/spi/GitDiffCommand_DequoteOutputStreamTest.java
@@ -0,0 +1,35 @@
+package sonia.scm.repository.spi;
+
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+public class GitDiffCommand_DequoteOutputStreamTest {
+
+  @Test
+  void shouldDequoteText() throws IOException {
+    String s = "diff --git \"a/file \\303\\272\\303\\274\\303\\276\\303\\253\\303\\251\\303\\245\\303\\253\\303\\245\\303\\251 a\" \"b/file \\303\\272\\303\\274\\303\\276\\303\\253\\303\\251\\303\\245\\303\\253\\303\\245\\303\\251 b\"\n" +
+      "new file mode 100644\n" +
+      "index 0000000..8cb0607\n" +
+      "--- /dev/null\n" +
+      "+++ \"b/\\303\\272\\303\\274\\303\\276\\303\\253\\303\\251\\303\\245\\303\\253\\303\\245\\303\\251 \\303\\245g\\303\\260f\\303\\237\"\n" +
+      "@@ -0,0 +1 @@\n" +
+      "+rthms";
+
+    ByteArrayOutputStream buffer = new ByteArrayOutputStream();
+    GitDiffCommand.DequoteOutputStream stream = new GitDiffCommand.DequoteOutputStream(buffer);
+    byte[] bytes = s.getBytes();
+    stream.write(bytes, 0, bytes.length);
+    stream.flush();
+
+    Assertions.assertThat(buffer.toString()).isEqualTo("diff --git a/file úüþëéåëåé a b/file úüþëéåëåé b\n" +
+      "new file mode 100644\n" +
+      "index 0000000..8cb0607\n" +
+      "--- /dev/null\n" +
+      "+++ b/úüþëéåëåé ågðfß\n" +
+      "@@ -0,0 +1 @@\n" +
+      "+rthms");
+  }
+}