diff --git a/src/cmd/converter/converter.go b/src/cmd/converter/converter.go
new file mode 100644
index 000000000..32c028d63
--- /dev/null
+++ b/src/cmd/converter/converter.go
@@ -0,0 +1,51 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/alcionai/corso/src/internal/converters/eml"
+	"github.com/alcionai/corso/src/pkg/services/m365/api"
+)
+
+func main() {
+	if len(os.Args) == 1 {
+		fmt.Println("Usage: converter <source-format> <target-format> <filename>")
+		os.Exit(1)
+	}
+
+	from := os.Args[1]
+	to := os.Args[2]
+	filename := os.Args[3]
+
+	body, err := os.ReadFile(filename)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	var out string
+
+	switch from {
+	case "msg":
+		switch to {
+		case "eml":
+			msg, err := api.BytesToMessageable(body)
+			if err != nil {
+				log.Fatal(err)
+			}
+
+			out, err = eml.ToEml(context.Background(), msg)
+			if err != nil {
+				log.Fatal(err)
+			}
+		default:
+			log.Fatal("Unknown target format", to)
+		}
+	default:
+		log.Fatal("Unknown source format", from)
+	}
+
+	fmt.Print(out)
+}