diff --git a/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/AttributeUpdaterKernel.java b/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/AttributeUpdaterKernel.java
index 3f36952..4e1e05e 100644
--- a/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/AttributeUpdaterKernel.java
+++ b/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/AttributeUpdaterKernel.java
@@ -36,8 +36,12 @@ public class AttributeUpdaterKernel {
         executor.awaitTermination(1, TimeUnit.DAYS);
         runtime = System.currentTimeMillis() - beforeTimer;
 
-        System.out.printf("%nFiles changed: %s%n", filesChangedAmount);
-        System.out.printf("Files not changed: %s%n", filesNotChangedAmount);
+        System.out.printf("%nFiles %schanged: %s%n",
+                ConfigUtil.getInstance().isSafeMode() ? "would " : "",
+                filesChangedAmount);
+        System.out.printf("Files %s not changed: %s%n",
+                ConfigUtil.getInstance().isSafeMode() ? "would " : "",
+                filesNotChangedAmount);
         System.out.printf("Runtime: %ss%n", runtime / 1000);
     }
 
diff --git a/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/Main.java b/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/Main.java
index 78c1f2c..6afe134 100644
--- a/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/Main.java
+++ b/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/Main.java
@@ -46,6 +46,7 @@ public class Main {
         options.addRequiredOption("l", "library", true, "path to library");
         options.addOption("c", "config", false, "path to config");
         options.addOption("t", "threads", true, "thread count");
+        options.addOption("s", "safe-mode", false, "Test run (no files will be changes)");
 
         CommandLineParser parser = new DefaultParser();
         HelpFormatter formatter = new HelpFormatter();
@@ -56,6 +57,7 @@ public class Main {
             configUtil.loadConfig(cmd.getOptionValue("config", "config.yaml")); // use cmd input
             configUtil.setLibraryPath(cmd.getOptionValue("library"));
             if (cmd.hasOption("threads")) configUtil.setThreadCount(parseInt(cmd.getOptionValue("threads")));
+            configUtil.setSafeMode(cmd.hasOption("safe-mode"));
             configUtil.isValid();
         } catch (ParseException e) {
             log.error(e);
diff --git a/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/ConfigProcessor.java b/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/ConfigProcessor.java
index 82d2972..bf03fa5 100644
--- a/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/ConfigProcessor.java
+++ b/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/config/ConfigProcessor.java
@@ -2,6 +2,7 @@ package at.pcgamingfreaks.mkvaudiosubtitlechanger.config;
 
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.MKVToolProperties;
 import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.FileAttribute;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.util.ConfigUtil;
 import lombok.Getter;
 import lombok.Setter;
 import lombok.extern.log4j.Log4j2;
@@ -121,7 +122,9 @@ public class ConfigProcessor {
                 return true;
             }
             try{
-                Runtime.getRuntime().exec(stringBuffer.toString());
+                if(!ConfigUtil.getInstance().isSafeMode()) {
+                    Runtime.getRuntime().exec(stringBuffer.toString());
+                }
             }catch(IOException e){
                 log.error("Couldn't make changes to file");
             }
diff --git a/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/util/ConfigUtil.java b/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/util/ConfigUtil.java
index 32ff212..53acab6 100644
--- a/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/util/ConfigUtil.java
+++ b/src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/util/ConfigUtil.java
@@ -27,6 +27,7 @@ public class ConfigUtil {
     @Getter(AccessLevel.NONE)
     private String mkvtoolnixPath;
     private String libraryPath;
+    private boolean isSafeMode;
 
     public static ConfigUtil getInstance() {
         if(configUtil == null) {