diff --git a/datacooker-commons/src/main/java/io/github/pastorgl/datacooker/commons/functions/StringFunctions.java b/datacooker-commons/src/main/java/io/github/pastorgl/datacooker/commons/functions/StringFunctions.java
index 7c75525..0ec5331 100644
--- a/datacooker-commons/src/main/java/io/github/pastorgl/datacooker/commons/functions/StringFunctions.java
+++ b/datacooker-commons/src/main/java/io/github/pastorgl/datacooker/commons/functions/StringFunctions.java
@@ -11,6 +11,7 @@
 import io.github.pastorgl.datacooker.scripting.Function.Ternary;
 import io.github.pastorgl.datacooker.scripting.Function.Unary;
 
+import java.util.Base64;
 import java.util.Deque;
 import java.util.Locale;
 
@@ -202,4 +203,38 @@ public String descr() {
                     " See Java Formatter class for complete reference";
         }
     }
+
+    public static class DECODE64 extends Unary<String, String> {
+        @Override
+        public String call(Deque<Object> args) {
+            return new String(Base64.getDecoder().decode(Evaluator.popString(args)));
+        }
+
+        @Override
+        public String name() {
+            return "STR_DECODE64";
+        }
+
+        @Override
+        public String descr() {
+            return "Decode a BASE64 encoded string";
+        }
+    }
+
+    public static class ENCODE64 extends Unary<String, Object> {
+        @Override
+        public String call(Deque<Object> args) {
+            return Base64.getEncoder().encodeToString(Evaluator.popBytes(args));
+        }
+
+        @Override
+        public String name() {
+            return "STR_BASE64";
+        }
+
+        @Override
+        public String descr() {
+            return "Encode stringified Object or byte array to a BASE64 encoded string";
+        }
+    }
 }
diff --git a/datacooker-commons/src/main/java/io/github/pastorgl/datacooker/scripting/Evaluator.java b/datacooker-commons/src/main/java/io/github/pastorgl/datacooker/scripting/Evaluator.java
index 3223238..3a25b93 100644
--- a/datacooker-commons/src/main/java/io/github/pastorgl/datacooker/scripting/Evaluator.java
+++ b/datacooker-commons/src/main/java/io/github/pastorgl/datacooker/scripting/Evaluator.java
@@ -18,6 +18,15 @@ static String popString(Deque<Object> args) {
         return String.valueOf(a);
     }
 
+    static byte[] popBytes(Deque<Object> args) {
+        Object a = args.pop();
+        if (!(a instanceof byte[])) {
+            return String.valueOf(a).getBytes();
+        }
+
+        return (byte[]) a;
+    }
+
     static Number popNumeric(Deque<Object> args) {
         Object a = args.pop();
         if (a instanceof Number) {