diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0cbb7f6..e90ab71 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog - project.linkedcorp.net
 
+## [1.4.0] - 2026-09-09
+### Added
+- Boton de revelar/ocultar clave (icono de ojo) en todos los campos de contraseña de la app:
+  login, registro, restablecer clave, cambiar clave (usuario logueado), crear usuario y la clave
+  SMTP en Configuración. Nuevo componente reutilizable `PasswordInput`.
+### Fixed
+- El fix de espacios en SMTP del v1.3.0 usaba `trim()`, que solo recorta los bordes. El caso real
+  en producción tenía el espacio a mitad del host (`"mail.linkedcorp." + " " + "net"`), asi que
+  seguia fallando tras el primer fix. Corregido para quitar cualquier espacio, no solo los bordes.
+
 ## [1.3.0] - 2026-09-06
 ### Added
 - Configuración → Correo (SMTP): botón "Enviar prueba" con campo de destinatario. Ejecuta un envío
diff --git a/VERSION b/VERSION
index f0bb29e..88c5fb8 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.3.0
+1.4.0
diff --git a/backend/package.json b/backend/package.json
index 93f90b6..692be5a 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "project-linkedcorp-backend",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "private": true,
   "type": "module",
   "main": "src/server.js",
diff --git a/frontend/package.json b/frontend/package.json
index 3c9aa04..86cc16d 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -1,7 +1,7 @@
 {
   "name": "project-linkedcorp-frontend",
   "private": true,
-  "version": "1.3.0",
+  "version": "1.4.0",
   "type": "module",
   "scripts": {
     "dev": "vite",
diff --git a/frontend/src/app/AppShell.jsx b/frontend/src/app/AppShell.jsx
index b9c29d8..a209fd9 100644
--- a/frontend/src/app/AppShell.jsx
+++ b/frontend/src/app/AppShell.jsx
@@ -6,6 +6,7 @@ import { Flyout, FlyoutItem, FlyoutSeparator } from '../components/Flyout.jsx';
 import { DetailPopup } from '../components/DetailPopup.jsx';
 import { Field } from '../components/Field.jsx';
 import { Button } from '../components/Button.jsx';
+import { PasswordInput } from '../components/PasswordInput.jsx';
 import { useAuth } from '../context/auth-context.jsx';
 import { useUi } from '../context/ui-context.jsx';
 import { useAsync } from '../hooks/useAsync.js';
@@ -131,13 +132,13 @@ export default function AppShell() {
       <DetailPopup open={changingPassword} title={t('change_password_title')} onClose={() => setChangingPassword(false)} width={420} height={380}>
         {passwordError && <div className="login-error">{passwordError}</div>}
         <Field label={t('change_password_current')}>
-          <input className="input" type="password" value={passwordForm.currentPassword} onChange={(e) => setPasswordForm((f) => ({ ...f, currentPassword: e.target.value }))} autoFocus />
+          <PasswordInput value={passwordForm.currentPassword} onChange={(e) => setPasswordForm((f) => ({ ...f, currentPassword: e.target.value }))} autoFocus />
         </Field>
         <Field label={t('reset_password_new')}>
-          <input className="input" type="password" value={passwordForm.newPassword} onChange={(e) => setPasswordForm((f) => ({ ...f, newPassword: e.target.value }))} />
+          <PasswordInput value={passwordForm.newPassword} onChange={(e) => setPasswordForm((f) => ({ ...f, newPassword: e.target.value }))} />
         </Field>
         <Field label={t('register_password_confirm')}>
-          <input className="input" type="password" value={passwordForm.confirmPassword} onChange={(e) => setPasswordForm((f) => ({ ...f, confirmPassword: e.target.value }))} />
+          <PasswordInput value={passwordForm.confirmPassword} onChange={(e) => setPasswordForm((f) => ({ ...f, confirmPassword: e.target.value }))} />
         </Field>
         <div style={{ display: 'flex', gap: 8 }}>
           <Button variant="accent" icon={Save} onClick={submitChangePassword}>{t('common_save')}</Button>
diff --git a/frontend/src/components/PasswordInput.jsx b/frontend/src/components/PasswordInput.jsx
new file mode 100644
index 0000000..fc499ec
--- /dev/null
+++ b/frontend/src/components/PasswordInput.jsx
@@ -0,0 +1,32 @@
+import { useState } from 'react';
+import { Eye, EyeOff } from 'lucide-react';
+import { useUi } from '../context/ui-context.jsx';
+
+export function PasswordInput({ value, onChange, required, autoFocus, placeholder, id }) {
+  const { t } = useUi();
+  const [visible, setVisible] = useState(false);
+  return (
+    <div className="password-input">
+      <input
+        id={id}
+        className="input"
+        type={visible ? 'text' : 'password'}
+        value={value}
+        onChange={onChange}
+        required={required}
+        autoFocus={autoFocus}
+        placeholder={placeholder}
+      />
+      <button
+        type="button"
+        className="icon-btn password-toggle"
+        onClick={() => setVisible((v) => !v)}
+        tabIndex={-1}
+        aria-label={visible ? t('password_hide') : t('password_show')}
+        title={visible ? t('password_hide') : t('password_show')}
+      >
+        {visible ? <EyeOff /> : <Eye />}
+      </button>
+    </div>
+  );
+}
diff --git a/frontend/src/i18n/messages.js b/frontend/src/i18n/messages.js
index 8f48c02..4072fe6 100644
--- a/frontend/src/i18n/messages.js
+++ b/frontend/src/i18n/messages.js
@@ -59,6 +59,8 @@ export const messages = {
     smtp_test_send: 'Enviar prueba',
     smtp_test_sending: 'Enviando...',
     smtp_test_success: 'Correo de prueba enviado correctamente a',
+    password_show: 'Mostrar clave',
+    password_hide: 'Ocultar clave',
     common_new: 'Nuevo',
     common_edit: 'Editar',
     common_save: 'Guardar',
@@ -242,6 +244,8 @@ export const messages = {
     smtp_test_send: 'Send test',
     smtp_test_sending: 'Sending...',
     smtp_test_success: 'Test email sent successfully to',
+    password_show: 'Show password',
+    password_hide: 'Hide password',
     common_new: 'New',
     common_edit: 'Edit',
     common_save: 'Save',
diff --git a/frontend/src/pages/Configuracion/SmtpSettingsPanel.jsx b/frontend/src/pages/Configuracion/SmtpSettingsPanel.jsx
index 2f6d2f1..fd400ab 100644
--- a/frontend/src/pages/Configuracion/SmtpSettingsPanel.jsx
+++ b/frontend/src/pages/Configuracion/SmtpSettingsPanel.jsx
@@ -6,6 +6,7 @@ import { getSmtpConfig, updateSmtpConfig, testSmtpConfig } from '../../services/
 import { Field, FieldRow } from '../../components/Field.jsx';
 import { Button } from '../../components/Button.jsx';
 import { InfoBar } from '../../components/InfoBar.jsx';
+import { PasswordInput } from '../../components/PasswordInput.jsx';
 
 export default function SmtpSettingsPanel() {
   const { t, pushToast } = useUi();
@@ -66,7 +67,7 @@ export default function SmtpSettingsPanel() {
         </Field>
       </FieldRow>
       <Field label={t('smtp_pass')} hint={config.configured ? t('smtp_pass_configured_hint') : undefined}>
-        <input className="input" type="password" value={form.pass} onChange={(e) => setForm((f) => ({ ...f, pass: e.target.value }))} />
+        <PasswordInput value={form.pass} onChange={(e) => setForm((f) => ({ ...f, pass: e.target.value }))} />
       </Field>
       <Button variant="accent" icon={Save} onClick={save}>{t('common_save')}</Button>
 
diff --git a/frontend/src/pages/Login/LoginPage.jsx b/frontend/src/pages/Login/LoginPage.jsx
index 64c7a41..1ce1246 100644
--- a/frontend/src/pages/Login/LoginPage.jsx
+++ b/frontend/src/pages/Login/LoginPage.jsx
@@ -5,6 +5,7 @@ import { useAuth } from '../../context/auth-context.jsx';
 import { useUi } from '../../context/ui-context.jsx';
 import { Field } from '../../components/Field.jsx';
 import { Button } from '../../components/Button.jsx';
+import { PasswordInput } from '../../components/PasswordInput.jsx';
 import logoDark from '../../assets/logoLinkedCorpTxt.png';
 import logoLight from '../../assets/logoLinkedCorpTxtBlack.png';
 
@@ -43,7 +44,7 @@ export default function LoginPage() {
           <input className="input" type="email" value={email} onChange={(e) => setEmail(e.target.value)} required autoFocus />
         </Field>
         <Field label={t('login_password')}>
-          <input className="input" type="password" value={password} onChange={(e) => setPassword(e.target.value)} required />
+          <PasswordInput value={password} onChange={(e) => setPassword(e.target.value)} required />
         </Field>
         <Button variant="accent" icon={LogIn} type="submit" disabled={loading} style={{ width: '100%', justifyContent: 'center' }}>
           {t('login_submit')}
diff --git a/frontend/src/pages/Login/RegisterPage.jsx b/frontend/src/pages/Login/RegisterPage.jsx
index e821366..6a67d0a 100644
--- a/frontend/src/pages/Login/RegisterPage.jsx
+++ b/frontend/src/pages/Login/RegisterPage.jsx
@@ -6,6 +6,7 @@ import { useUi } from '../../context/ui-context.jsx';
 import { register } from '../../services/auth.js';
 import { Field } from '../../components/Field.jsx';
 import { Button } from '../../components/Button.jsx';
+import { PasswordInput } from '../../components/PasswordInput.jsx';
 import logoDark from '../../assets/logoLinkedCorpTxt.png';
 import logoLight from '../../assets/logoLinkedCorpTxtBlack.png';
 
@@ -61,10 +62,10 @@ export default function RegisterPage() {
               <input className="input" type="email" value={email} onChange={(e) => setEmail(e.target.value)} required />
             </Field>
             <Field label={t('login_password')}>
-              <input className="input" type="password" value={password} onChange={(e) => setPassword(e.target.value)} required />
+              <PasswordInput value={password} onChange={(e) => setPassword(e.target.value)} required />
             </Field>
             <Field label={t('register_password_confirm')}>
-              <input className="input" type="password" value={confirm} onChange={(e) => setConfirm(e.target.value)} required />
+              <PasswordInput value={confirm} onChange={(e) => setConfirm(e.target.value)} required />
             </Field>
             <Button variant="accent" icon={UserPlus} type="submit" disabled={loading} style={{ width: '100%', justifyContent: 'center' }}>
               {t('register_submit')}
diff --git a/frontend/src/pages/Login/ResetPasswordPage.jsx b/frontend/src/pages/Login/ResetPasswordPage.jsx
index fdcf28c..d019d75 100644
--- a/frontend/src/pages/Login/ResetPasswordPage.jsx
+++ b/frontend/src/pages/Login/ResetPasswordPage.jsx
@@ -5,6 +5,7 @@ import { useUi } from '../../context/ui-context.jsx';
 import { resetPassword } from '../../services/auth.js';
 import { Field } from '../../components/Field.jsx';
 import { Button } from '../../components/Button.jsx';
+import { PasswordInput } from '../../components/PasswordInput.jsx';
 import logoDark from '../../assets/logoLinkedCorpTxt.png';
 import logoLight from '../../assets/logoLinkedCorpTxtBlack.png';
 
@@ -49,10 +50,10 @@ export default function ResetPasswordPage() {
         ) : (
           <>
             <Field label={t('reset_password_new')}>
-              <input className="input" type="password" value={password} onChange={(e) => setPassword(e.target.value)} required autoFocus />
+              <PasswordInput value={password} onChange={(e) => setPassword(e.target.value)} required autoFocus />
             </Field>
             <Field label={t('register_password_confirm')}>
-              <input className="input" type="password" value={confirm} onChange={(e) => setConfirm(e.target.value)} required />
+              <PasswordInput value={confirm} onChange={(e) => setConfirm(e.target.value)} required />
             </Field>
             <Button variant="accent" icon={KeyRound} type="submit" disabled={loading || !token} style={{ width: '100%', justifyContent: 'center' }}>
               {t('reset_password_submit')}
diff --git a/frontend/src/pages/Organizacion/UsersPanel.jsx b/frontend/src/pages/Organizacion/UsersPanel.jsx
index 43a305e..db04294 100644
--- a/frontend/src/pages/Organizacion/UsersPanel.jsx
+++ b/frontend/src/pages/Organizacion/UsersPanel.jsx
@@ -12,6 +12,7 @@ import { Field, FieldRow } from '../../components/Field.jsx';
 import { ComboBox } from '../../components/ComboBox.jsx';
 import { Badge } from '../../components/Badge.jsx';
 import { DetailPopup } from '../../components/DetailPopup.jsx';
+import { PasswordInput } from '../../components/PasswordInput.jsx';
 
 function flatten(nodes, acc = []) {
   for (const n of nodes) { acc.push(n); if (n.children?.length) flatten(n.children, acc); }
@@ -169,7 +170,7 @@ export default function UsersPanel() {
           </Field>
           {!selected && (
             <Field label={t('user_password')}>
-              <input className="input" type="password" value={form.password} onChange={(e) => setForm((f) => ({ ...f, password: e.target.value }))} />
+              <PasswordInput value={form.password} onChange={(e) => setForm((f) => ({ ...f, password: e.target.value }))} />
             </Field>
           )}
         </FieldRow>
diff --git a/frontend/src/styles/app.css b/frontend/src/styles/app.css
index 4629df7..d5c2384 100644
--- a/frontend/src/styles/app.css
+++ b/frontend/src/styles/app.css
@@ -124,6 +124,15 @@ button { font-family: inherit; }
 .search-input input { padding-left: 32px; }
 .search-input svg { position: absolute; left: 9px; top: 50%; transform: translateY(-50%); width: 15px; height: 15px; color: rgb(var(--muted)); }
 
+/* --- Password reveal toggle: input queda dentro para no romper el layout de .field --- */
+.password-input { position: relative; width: 100%; }
+.password-input input { padding-right: 34px; }
+.password-input .password-toggle {
+  position: absolute; right: 2px; top: 50%; transform: translateY(-50%);
+  width: 28px; height: 28px;
+}
+.password-input .password-toggle svg { width: 16px; height: 16px; }
+
 .list-card { background: rgb(var(--surface)); border: 1px solid rgb(var(--line)); border-radius: var(--r-lg); overflow: hidden; }
 table.list-table { width: 100%; border-collapse: collapse; font-size: .8rem; }
 .list-table th {