diff --git a/hwilib/_gui.py b/hwilib/_gui.py
index 5591a8c2b..bfdbc8e19 100644
--- a/hwilib/_gui.py
+++ b/hwilib/_gui.py
@@ -1,5 +1,6 @@
 #! /usr/bin/env python3
 
+import base64
 import json
 import logging
 import sys
@@ -26,7 +27,7 @@
     exit(-1)
 
 from PySide2.QtGui import QRegExpValidator
-from PySide2.QtWidgets import QApplication, QDialog, QDialogButtonBox, QLineEdit, QMessageBox, QMainWindow
+from PySide2.QtWidgets import QApplication, QDialog, QDialogButtonBox, QFileDialog, QLineEdit, QMessageBox, QMainWindow, QMenu
 from PySide2.QtCore import QCoreApplication, QRegExp, Signal, Slot
 
 def do_command(f, *args, **kwargs):
@@ -125,6 +126,52 @@ def __init__(self, client):
         self.ui.sign_psbt_button.clicked.connect(self.sign_psbt_button_clicked)
         self.ui.buttonBox.clicked.connect(self.accept)
 
+        menu = QMenu()
+        self.ui.import_toolbutton.setMenu(menu)
+        menu = self.ui.import_toolbutton.menu()
+        menu.addAction("From binary").triggered.connect(self.import_binary_clicked)
+        menu.addAction("From base64").triggered.connect(self.import_base64_clicked)
+
+        menu = QMenu()
+        self.ui.export_toolbutton.setMenu(menu)
+        menu = self.ui.export_toolbutton.menu()
+        menu.addAction("To binary").triggered.connect(self.export_binary_clicked)
+        menu.addAction("To base64").triggered.connect(self.export_base64_clicked)
+
+    @Slot()
+    def import_base64_clicked(self):
+        filename, _ = QFileDialog.getOpenFileName(self, 'Open file')
+        if filename:
+            with open(filename, 'r', encoding='utf-8') as f:
+                b64 = f.read()
+                self.ui.psbt_in_textedit.setPlainText(b64)
+
+    @Slot()
+    def import_binary_clicked(self):
+        filename, _ = QFileDialog.getOpenFileName(self, 'Open file', "", "PSBT (*.psbt)")
+        if filename:
+            with open(filename, 'rb') as f:
+                bin = f.read()
+                b64 = base64.b64encode(bin).decode()
+                self.ui.psbt_in_textedit.setPlainText(b64)
+
+    @Slot()
+    def export_base64_clicked(self):
+        filename, _ = QFileDialog.getSaveFileName(self, 'Save file')
+        if filename:
+            with open(filename, 'w') as f:
+                b64 = self.ui.psbt_out_textedit.toPlainText()
+                f.write(b64)
+
+    @Slot()
+    def export_binary_clicked(self):
+        filename, _ = QFileDialog.getSaveFileName(self, 'Save file', "untitled.psbt")
+        if filename:
+            with open(filename, 'wb') as f:
+                b64 = self.ui.psbt_out_textedit.toPlainText()
+                bin = base64.b64decode(b64.encode())
+                f.write(bin)
+
     @Slot()
     def sign_psbt_button_clicked(self):
         psbt_str = self.ui.psbt_in_textedit.toPlainText()
diff --git a/hwilib/ui/signpsbtdialog.ui b/hwilib/ui/signpsbtdialog.ui
index fbdeab4f7..ef9a67864 100644
--- a/hwilib/ui/signpsbtdialog.ui
+++ b/hwilib/ui/signpsbtdialog.ui
@@ -54,6 +54,16 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QToolButton" name="import_toolbutton">
+       <property name="text">
+        <string>Import PSBT</string>
+       </property>
+       <property name="popupMode">
+        <enum>QToolButton::InstantPopup</enum>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="verticalSpacer">
        <property name="orientation">
@@ -69,6 +79,26 @@
      </item>
     </layout>
    </item>
+   <item row="1" column="2">
+    <widget class="QPlainTextEdit" name="psbt_in_textedit">
+     <property name="minimumSize">
+      <size>
+       <width>300</width>
+       <height>120</height>
+      </size>
+     </property>
+    </widget>
+   </item>
+   <item row="4" column="2">
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Close</set>
+     </property>
+    </widget>
+   </item>
    <item row="3" column="0">
     <layout class="QVBoxLayout" name="verticalLayout">
      <item>
@@ -94,6 +124,16 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QToolButton" name="export_toolbutton">
+       <property name="text">
+        <string>Export PSBT</string>
+       </property>
+       <property name="popupMode">
+        <enum>QToolButton::InstantPopup</enum>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="verticalSpacer_4">
        <property name="orientation">
@@ -109,16 +149,6 @@
      </item>
     </layout>
    </item>
-   <item row="1" column="2">
-    <widget class="QPlainTextEdit" name="psbt_in_textedit">
-     <property name="minimumSize">
-      <size>
-       <width>300</width>
-       <height>120</height>
-      </size>
-     </property>
-    </widget>
-   </item>
    <item row="3" column="2">
     <widget class="QPlainTextEdit" name="psbt_out_textedit">
      <property name="minimumSize">
@@ -175,16 +205,6 @@
      </item>
     </layout>
    </item>
-   <item row="4" column="2">
-    <widget class="QDialogButtonBox" name="buttonBox">
-     <property name="orientation">
-      <enum>Qt::Horizontal</enum>
-     </property>
-     <property name="standardButtons">
-      <set>QDialogButtonBox::Close</set>
-     </property>
-    </widget>
-   </item>
   </layout>
  </widget>
  <resources/>