diff --git a/src/invalidatebulkrecords.php b/src/invalidatebulkrecords.php
new file mode 100644
index 0000000..c6cf09e
--- /dev/null
+++ b/src/invalidatebulkrecords.php
@@ -0,0 +1,88 @@
+<?php
+require_once("core.php");
+security::checkType(security::HYPERADMIN);
+
+$companies = companies::getAll();
+
+$mdHeaderRowBefore = visual::backBtn("powertools.php");
+?>
+<!DOCTYPE html>
+<html>
+<head>
+  <title><?php echo $conf["appName"]; ?></title>
+  <?php visual::includeHead(); ?>
+  <link rel="stylesheet" href="css/dashboard.css">
+</head>
+<?php visual::printBodyTag(); ?>
+  <div class="mdl-layout mdl-js-layout mdl-layout--fixed-header mdl-layout--fixed-drawer">
+    <?php visual::includeNav(); ?>
+    <main class="mdl-layout__content">
+      <div class="page-content">
+        <div class="main mdl-shadow--4dp">
+          <h2>Invalidar registros en masa</h2>
+          <p>Selecciona los trabajadores de los cuales quieres invalidar sus registros, y el periodo de tiempo aplicable:</p>
+          <form action="doinvalidatebulkrecords.php" method="POST">
+            <h5>Periodo de tiempo</h5>
+            <p>Del <input type="date" name="begins" required> al <input type="date" name="ends" required></p>
+
+            <h5>Personas</h5>
+
+            <div class="overflow-wrapper overflow-wrapper--for-table">
+              <table class="mdl-data-table mdl-js-data-table mdl-data-table--selectable mdl-shadow--2dp">
+                <thead>
+                  <tr>
+                    <?php
+                    if ($conf["debug"]) {
+                      ?>
+                      <th class="extra">ID</th>
+                      <?php
+                    }
+                    ?>
+                    <th class="mdl-data-table__cell--non-numeric">Nombre</th>
+                    <th class="mdl-data-table__cell--non-numeric">Empresa</th>
+                    <th class="mdl-data-table__cell--non-numeric extra">Categoría</th>
+                  </tr>
+                </thead>
+                <tbody>
+                  <?php
+                  $workers = people::getAll(false, true);
+                  foreach ($workers as $w) {
+                    ?>
+                    <tr data-worker-id="<?=(int)$w["workerid"]?>">
+                      <?php
+                      if ($conf["debug"]) {
+                        ?>
+                        <td class="extra"><?=(int)$w["workerid"]?></td>
+                        <?php
+                      }
+                      ?>
+                      <td class="mdl-data-table__cell--non-numeric"><?=security::htmlsafe($w["name"])?></td>
+                      <td class="mdl-data-table__cell--non-numeric"><?=security::htmlsafe($companies[$w["companyid"]])?></td>
+                      <td class="mdl-data-table__cell--non-numeric extra"><?=security::htmlsafe($w["category"])?></td>
+                    </tr>
+                    <?php
+                  }
+                  ?>
+                </tbody>
+              </table>
+            </div>
+            <br>
+            <button class="mdl-button mdl-js-button mdl-button--raised mdl-button--accent mdl-js-ripple-effect">Invalidar</button>
+          </form>
+        </div>
+      </div>
+    </main>
+  </div>
+
+  <?php
+  visual::smartSnackbar([
+    ["empty", "Faltan datos por introducir en el formulario."],
+    ["unexpected", "Ha ocurrido un error inesperado. Inténtelo de nuevo en unos segundos."],
+    ["inverted", "La fecha de inicio debe ser igual o anterior a la de fin."],
+    ["success", "Se han invalidado todos los registros correspondientes correcamente."],
+    ["partialortotalfailure", "Varios (o todos) los registros no se han podido invalidar correctamente."]
+  ]);
+  ?>
+  <script src="js/invalidatebulkrecords.js"></script>
+</body>
+</html>