diff --git a/README.md b/README.md
index 84d024c..3865970 100644
--- a/README.md
+++ b/README.md
@@ -110,6 +110,15 @@ devd convert to_upper_case [input]
 # devd c uppercase aa
 ```
 
+#### Encode/Decode base64
+
+```bash
+devd convert encode_base64 [input]
+# devd c base64 123
+devd convert decode_base64 [base64]
+# devd c decode_base64 TVRJeg==
+```
+
 ### Hashing tools
 
 ```bash
diff --git a/cmd/convert/decode_base64.go b/cmd/convert/decode_base64.go
new file mode 100644
index 0000000..7cd055b
--- /dev/null
+++ b/cmd/convert/decode_base64.go
@@ -0,0 +1,25 @@
+package convert
+
+import (
+	"encoding/base64"
+	"fmt"
+	libutils "github.com/EscanBE/go-lib/utils"
+	"github.com/spf13/cobra"
+)
+
+// GetDecodeBase64CaseCmd creates a helper command that decode base64
+func GetDecodeBase64CaseCmd() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "decode_base64 [base64]",
+		Short: "Decode base64",
+		Args:  cobra.ExactArgs(1),
+		Run: func(cmd *cobra.Command, args []string) {
+			data, err := base64.StdEncoding.DecodeString(args[0])
+			libutils.ExitIfErr(err, "failed to decode base64")
+
+			fmt.Println(string(data))
+		},
+	}
+
+	return cmd
+}
diff --git a/cmd/convert/encode_base64.go b/cmd/convert/encode_base64.go
new file mode 100644
index 0000000..290903d
--- /dev/null
+++ b/cmd/convert/encode_base64.go
@@ -0,0 +1,23 @@
+package convert
+
+import (
+	"encoding/base64"
+	"fmt"
+	"github.com/spf13/cobra"
+	"strings"
+)
+
+// GetEncodeBase64CaseCmd creates a helper command that encode input into base64
+func GetEncodeBase64CaseCmd() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:     "encode_base64 [text]",
+		Aliases: []string{"base64"},
+		Short:   "Encode input into base64",
+		Args:    cobra.MinimumNArgs(1),
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Println(base64.StdEncoding.EncodeToString([]byte(strings.Join(args, " "))))
+		},
+	}
+
+	return cmd
+}
diff --git a/cmd/convert/root.go b/cmd/convert/root.go
index abd6edd..fd1ffc3 100644
--- a/cmd/convert/root.go
+++ b/cmd/convert/root.go
@@ -19,6 +19,8 @@ func Commands() *cobra.Command {
 		GetConvertSolcSignatureCmd(),
 		GetConvertToLowerCaseCmd(),
 		GetConvertToUpperCaseCmd(),
+		GetDecodeBase64CaseCmd(),
+		GetEncodeBase64CaseCmd(),
 	)
 
 	return cmd