diff --git a/src/flextype/core/Parsers/Expressions/UnlessExpression.php b/src/flextype/core/Parsers/Expressions/UnlessExpression.php
new file mode 100644
index 00000000..49a47ce6
--- /dev/null
+++ b/src/flextype/core/Parsers/Expressions/UnlessExpression.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+ /**
+ * Flextype - Hybrid Content Management System with the freedom of a headless CMS
+ * and with the full functionality of a traditional CMS!
+ *
+ * Copyright (c) Sergey Romanenko (https://awilum.github.io)
+ *
+ * Licensed under The MIT License.
+ *
+ * For full copyright and license information, please see the LICENSE
+ * Redistributions of files must retain the above copyright notice.
+ */
+
+namespace Flextype\Parsers\Expressions;
+
+use Symfony\Component\ExpressionLanguage\ExpressionFunction;
+use Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface;
+
+use Glowy\Macroable\Macroable;
+
+class WhenExpression implements ExpressionFunctionProviderInterface
+{
+    public function getFunctions()
+    {
+        return [
+            new ExpressionFunction('unless', 
+                static fn (bool $value, $result) => ($value === false) ? $result : '', 
+                static fn ($arguments, bool $value, $result) => ($value === false) ? $result : ''
+            )
+        ];
+    }
+}
\ No newline at end of file
diff --git a/src/flextype/core/Parsers/Expressions/WhenExpression.php b/src/flextype/core/Parsers/Expressions/WhenExpression.php
new file mode 100644
index 00000000..e715f9e5
--- /dev/null
+++ b/src/flextype/core/Parsers/Expressions/WhenExpression.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+ /**
+ * Flextype - Hybrid Content Management System with the freedom of a headless CMS
+ * and with the full functionality of a traditional CMS!
+ *
+ * Copyright (c) Sergey Romanenko (https://awilum.github.io)
+ *
+ * Licensed under The MIT License.
+ *
+ * For full copyright and license information, please see the LICENSE
+ * Redistributions of files must retain the above copyright notice.
+ */
+
+namespace Flextype\Parsers\Expressions;
+
+use Symfony\Component\ExpressionLanguage\ExpressionFunction;
+use Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface;
+
+use Glowy\Macroable\Macroable;
+
+class WhenExpression implements ExpressionFunctionProviderInterface
+{
+    public function getFunctions()
+    {
+        return [
+            new ExpressionFunction('when', 
+                static fn (bool $value, $result) => ($value === true) ? $result : '', 
+                static fn ($arguments, bool $value, $result) => ($value === true) ? $result : ''
+            )
+        ];
+    }
+}
\ No newline at end of file
diff --git a/src/flextype/settings.yaml b/src/flextype/settings.yaml
index defef310..f62a6123 100644
--- a/src/flextype/settings.yaml
+++ b/src/flextype/settings.yaml
@@ -725,7 +725,13 @@ parsers:
       url:
         enabled: true
         class: "Flextype\\Parsers\\Expressions\\UrlExpression"
-
+      when:
+        enabled: true
+        class: "Flextype\\Parsers\\Expressions\\WhenExpression"
+      unless:
+        enabled: true
+        class: "Flextype\\Parsers\\Expressions\\UnlessnExpression"
+        
 # CORS
 #
 # CORS (Cross-origin resource sharing) allows JavaScript web apps to make HTTP requests to other domains.
diff --git a/tests/src/flextype/core/Parsers/Expressions/UnlessExpressionTest.php b/tests/src/flextype/core/Parsers/Expressions/UnlessExpressionTest.php
new file mode 100644
index 00000000..aead2a55
--- /dev/null
+++ b/tests/src/flextype/core/Parsers/Expressions/UnlessExpressionTest.php
@@ -0,0 +1,26 @@
+<?php
+
+use Flextype\Component\Filesystem\Filesystem;
+use function Glowy\Filesystem\filesystem;
+use function Flextype\entries;
+
+beforeEach(function() {
+    filesystem()->directory(FLEXTYPE_PATH_PROJECT . '/entries')->create();
+});
+
+afterEach(function (): void {
+    filesystem()->directory(FLEXTYPE_PATH_PROJECT . '/entries')->delete();
+});
+
+test('unless expression', function () {
+    
+    entries()->create('unless', [
+        'title' => 'Title',
+
+        'test-unless-positive' => '[[ unless(title == "Foo", "Yes!") ]]',
+        'test-unless-negative' => '[[ unless(title == "Title", "No!") ]]'
+    ]);
+
+    expect(entries()->fetch('unless')['test-unless-positive'])->toBe('Yes!');
+    expect(entries()->fetch('unless')['test-unless-negative'])->toBe('No!');
+});
\ No newline at end of file
diff --git a/tests/src/flextype/core/Parsers/Expressions/WhenExpressionTest.php b/tests/src/flextype/core/Parsers/Expressions/WhenExpressionTest.php
new file mode 100644
index 00000000..16f7b01a
--- /dev/null
+++ b/tests/src/flextype/core/Parsers/Expressions/WhenExpressionTest.php
@@ -0,0 +1,26 @@
+<?php
+
+use Flextype\Component\Filesystem\Filesystem;
+use function Glowy\Filesystem\filesystem;
+use function Flextype\entries;
+
+beforeEach(function() {
+    filesystem()->directory(FLEXTYPE_PATH_PROJECT . '/entries')->create();
+});
+
+afterEach(function (): void {
+    filesystem()->directory(FLEXTYPE_PATH_PROJECT . '/entries')->delete();
+});
+
+test('when expression', function () {
+    
+    entries()->create('when', [
+        'title' => 'Title',
+
+        'test-when-positive' => '[[ when(title == "Title", "Yes!") ]]',
+        'test-when-negative' => '[[ when(title == "Foo", "No!") ]]'
+    ]);
+
+    expect(entries()->fetch('when')['test-when-positive'])->toBe('Yes!');
+    expect(entries()->fetch('when')['test-when-negative'])->toBe('No!');
+});
\ No newline at end of file