diff --git a/api/qz_sign.php b/api/qz_sign.php
new file mode 100644
index 0000000..76bd7a8
--- /dev/null
+++ b/api/qz_sign.php
@@ -0,0 +1,18 @@
+<?php
+/**
+ * POST /api/qz_sign.php
+ * Firma el request de QZ Tray con la llave privada RSA del servidor.
+ * QZ Tray verifica la firma usando el digital-certificate.txt instalado en el cliente.
+ */
+header('Content-Type: text/plain');
+header('Access-Control-Allow-Origin: *');
+
+$request = file_get_contents('php://input');
+if (!$request) { http_response_code(400); exit('missing request'); }
+
+$keyPath = __DIR__ . '/../config/qz/private-key.pem';
+$key = openssl_pkey_get_private('file://' . $keyPath);
+if (!$key) { http_response_code(500); exit('key error'); }
+
+openssl_sign($request, $signature, $key, 'SHA512');
+echo base64_encode($signature);
diff --git a/assets/js/qz-print.js b/assets/js/qz-print.js
new file mode 100644
index 0000000..f0d932d
--- /dev/null
+++ b/assets/js/qz-print.js
@@ -0,0 +1,48 @@
+/**
+ * qz-print.js — Impresión silenciosa vía QZ Tray
+ * Requiere qz-tray.js cargado antes de este archivo.
+ * Uso: qzPrint({ url, printer })
+ */
+window.qzPrint = async function({ printer } = {}) {
+    try {
+        // 1. Conectar
+        if (!qz.websocket.isActive()) {
+            await qz.websocket.connect();
+        }
+
+        // 2. Firma con el servidor
+        qz.security.setSignatureAlgorithm('SHA512');
+        qz.security.setSignaturePromise(function(toSign) {
+            return function(resolve, reject) {
+                fetch('/api/qz_sign.php', { method: 'POST', body: toSign })
+                    .then(r => r.text()).then(resolve).catch(reject);
+            };
+        });
+
+        // 3. Certificado público
+        qz.security.setCertificatePromise(function(resolve) {
+            fetch('/config/qz/digital-certificate.txt')
+                .then(r => r.text()).then(resolve);
+        });
+
+        // 4. Seleccionar impresora
+        var p = printer || await qz.printers.getDefault();
+        console.log('[QZ] Impresora:', p);
+
+        // 5. Imprimir la página actual como HTML
+        var cfg  = qz.configs.create(p);
+        var data = [{
+            type  : 'pixel',
+            format: 'html',
+            flavor: 'plain',
+            data  : document.documentElement.outerHTML,
+        }];
+
+        await qz.print(cfg, data);
+        console.log('[QZ] Trabajo enviado correctamente');
+    } catch(e) {
+        console.warn('[QZ] Error:', e.message || e);
+        // Fallback al diálogo del navegador si QZ no está disponible
+        window.print();
+    }
+};
diff --git a/config/qz/.htaccess b/config/qz/.htaccess
new file mode 100644
index 0000000..104644c
--- /dev/null
+++ b/config/qz/.htaccess
@@ -0,0 +1,5 @@
+# Bloquear acceso web a la llave privada
+<Files "private-key.pem">
+    Order deny,allow
+    Deny from all
+</Files>
diff --git a/config/qz/digital-certificate.txt b/config/qz/digital-certificate.txt
new file mode 100644
index 0000000..9a03dcb
--- /dev/null
+++ b/config/qz/digital-certificate.txt
@@ -0,0 +1,24 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/config/qz/private-key.pem b/config/qz/private-key.pem
new file mode 100644
index 0000000..a9eb89c
--- /dev/null
+++ b/config/qz/private-key.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/ver_formulario_enviado.php b/ver_formulario_enviado.php
index 4ceb626..0628da1 100644
--- a/ver_formulario_enviado.php
+++ b/ver_formulario_enviado.php
@@ -2762,7 +2762,16 @@ const topaz = (() => {
 <?php endif; ?>
 </script>
 <?php if ($autoprint): ?>
-<script>window.addEventListener('load', function() { setTimeout(function() { window.print(); }, 600); });</script>
+<script src="https://cdn.jsdelivr.net/npm/qz-tray@2.2.4/qz-tray.js"></script>
+<script src="/assets/js/qz-print.js"></script>
+<script>
+window.addEventListener('load', function() {
+    setTimeout(function() {
+        if (typeof qz !== 'undefined') { qzPrint(); }
+        else { window.print(); }
+    }, 800);
+});
+</script>
 <?php endif; ?>
 </body>
 </html>