diff --git a/src/filechooser.h b/src/filechooser.h
--- a/src/filechooser.h
+++ b/src/filechooser.h
@@ -27,6 +27,7 @@
 
 class KFileWidget;
 class QDialogButtonBox;
+class QCheckBox;
 
 class FileDialog : public QDialog
 {
@@ -37,7 +38,9 @@
     FileDialog(QDialog *parent = nullptr, Qt::WindowFlags flags = {});
     ~FileDialog();
 
+    bool readOnly() const;
 private:
+    QCheckBox *m_readOnlyCheckbox;
     QDialogButtonBox *m_buttons;
 protected:
     KFileWidget *m_fileWidget;
diff --git a/src/filechooser.cpp b/src/filechooser.cpp
--- a/src/filechooser.cpp
+++ b/src/filechooser.cpp
@@ -22,6 +22,7 @@
 #include "utils.h"
 
 #include <QDialogButtonBox>
+#include <QCheckBox>
 #include <QDBusMetaType>
 #include <QDBusArgument>
 #include <QLoggingCategory>
@@ -90,6 +91,11 @@
     setLayout(new QVBoxLayout);
     layout()->addWidget(m_fileWidget);
 
+    m_readOnlyCheckbox = new QCheckBox(this);
+    m_readOnlyCheckbox->setChecked(false);
+    m_readOnlyCheckbox->setText(i18n("Open as read-only"));
+    m_fileWidget->setCustomWidget(m_readOnlyCheckbox);
+
     m_buttons = new QDialogButtonBox(this);
     m_buttons->addButton(m_fileWidget->okButton(), QDialogButtonBox::AcceptRole);
     m_buttons->addButton(m_fileWidget->cancelButton(), QDialogButtonBox::RejectRole);
@@ -105,6 +111,11 @@
 {
 }
 
+bool FileDialog::readOnly() const
+{
+    return m_readOnlyCheckbox->isChecked();
+}
+
 FileChooserPortal::FileChooserPortal(QObject *parent)
     : QDBusAbstractAdaptor(parent)
 {
@@ -209,6 +220,7 @@
         }
 
         results.insert(QStringLiteral("uris"), files);
+        results.insert(QStringLiteral("writable"), !fileDialog->readOnly());
         return 0;
     }