diff --git a/composer.json b/composer.json
index 36dd461e..dd12097c 100644
--- a/composer.json
+++ b/composer.json
@@ -90,6 +90,7 @@
         "symfony/yaml": "7.4.*",
         "symplify/easy-coding-standard": "^12.5.20",
         "tecnickcom/tc-lib-barcode": "^2.1.4",
+        "tiendanube/gtinvalidation": "^1.0",
         "twig/cssinliner-extra": "^3.0",
         "twig/extra-bundle": "^3.8",
         "twig/html-extra": "^3.8",
diff --git a/composer.lock b/composer.lock
index b56a61f9..9ccb922e 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "7ca9c95fb85f6bf3d9b8a3aa98ca33f6",
+    "content-hash": "b47c8579efa64349c5e65296e2a44206",
     "packages": [
         {
             "name": "amphp/amp",
@@ -16830,6 +16830,54 @@
             ],
             "time": "2025-05-14T06:15:44+00:00"
         },
+        {
+            "name": "tiendanube/gtinvalidation",
+            "version": "v1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/TiendaNube/GtinValidator.git",
+                "reference": "7ff5794b6293eb748bf1efcddf4e20a657c31855"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/TiendaNube/GtinValidator/zipball/7ff5794b6293eb748bf1efcddf4e20a657c31855",
+                "reference": "7ff5794b6293eb748bf1efcddf4e20a657c31855",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.4"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "4.6.*"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "GtinValidation\\": "src/GtinValidation"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Ryan Blakemore",
+                    "homepage": "https://github.com/ryanblak",
+                    "role": "developer"
+                }
+            ],
+            "description": "Validates GTIN product codes.",
+            "keywords": [
+                "gtin",
+                "product codes"
+            ],
+            "support": {
+                "issues": "https://github.com/TiendaNube/GtinValidator/issues",
+                "source": "https://github.com/TiendaNube/GtinValidator/tree/master"
+            },
+            "time": "2018-07-25T22:31:29+00:00"
+        },
         {
             "name": "tijsverkoyen/css-to-inline-styles",
             "version": "v2.4.0",
diff --git a/src/Entity/Parts/PartTraits/AdvancedPropertyTrait.php b/src/Entity/Parts/PartTraits/AdvancedPropertyTrait.php
index 38130f0d..065469b5 100644
--- a/src/Entity/Parts/PartTraits/AdvancedPropertyTrait.php
+++ b/src/Entity/Parts/PartTraits/AdvancedPropertyTrait.php
@@ -24,6 +24,7 @@ namespace App\Entity\Parts\PartTraits;
 
 use App\Entity\Parts\InfoProviderReference;
 use App\Entity\Parts\PartCustomState;
+use App\Validator\Constraints\ValidGTIN;
 use Doctrine\DBAL\Types\Types;
 use App\Entity\Parts\Part;
 use Doctrine\ORM\Mapping as ORM;
@@ -89,7 +90,7 @@ trait AdvancedPropertyTrait
      */
     #[Groups(['extended', 'full', 'import', 'part:read', 'part:write'])]
     #[ORM\Column(type: Types::STRING, nullable: true)]
-    #[Length(max: 14)]
+    #[ValidGTIN]
     protected ?string $gtin = null;
 
     /**
diff --git a/src/Form/Part/PartBaseType.php b/src/Form/Part/PartBaseType.php
index b8276589..902aff40 100644
--- a/src/Form/Part/PartBaseType.php
+++ b/src/Form/Part/PartBaseType.php
@@ -216,7 +216,13 @@ class PartBaseType extends AbstractType
                 'disable_not_selectable' => true,
                 'label' => 'part.edit.partCustomState',
             ])
-            ->add('ipn', TextType::class, $ipnOptions);
+            ->add('ipn', TextType::class, $ipnOptions)
+            ->add('gtin', TextType::class, [
+                'required' => false,
+                'empty_data' => null,
+                'label' => 'part.gtin',
+            ])
+            ;
 
         //Comment section
         $builder->add('comment', RichTextEditorType::class, [
diff --git a/src/Validator/Constraints/ValidGTIN.php b/src/Validator/Constraints/ValidGTIN.php
new file mode 100644
index 00000000..20e81f1d
--- /dev/null
+++ b/src/Validator/Constraints/ValidGTIN.php
@@ -0,0 +1,35 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2026 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+
+namespace App\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * A constraint to ensure that a GTIN is valid.
+ */
+#[\Attribute(\Attribute::TARGET_PROPERTY)]
+class ValidGTIN extends Constraint
+{
+
+}
diff --git a/src/Validator/Constraints/ValidGTINValidator.php b/src/Validator/Constraints/ValidGTINValidator.php
new file mode 100644
index 00000000..57eb23e6
--- /dev/null
+++ b/src/Validator/Constraints/ValidGTINValidator.php
@@ -0,0 +1,54 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2026 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+
+namespace App\Validator\Constraints;
+
+use GtinValidation\GtinValidator;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+
+class ValidGTINValidator extends ConstraintValidator
+{
+
+    public function validate(mixed $value, Constraint $constraint): void
+    {
+        if (!$constraint instanceof ValidGTIN) {
+            throw new UnexpectedTypeException($constraint, ValidGTIN::class);
+        }
+
+        if (null === $value || '' === $value) {
+            return;
+        }
+
+        if (!is_string($value)) {
+            throw new UnexpectedTypeException($value, 'string');
+        }
+
+        $gtinValidator = new GtinValidator($value);
+        if (!$gtinValidator->isValid()) {
+            $this->context->buildViolation('validator.invalid_gtin')
+                ->addViolation();
+        }
+    }
+}
diff --git a/templates/parts/edit/_advanced.html.twig b/templates/parts/edit/_advanced.html.twig
index b0f1ff86..30479d11 100644
--- a/templates/parts/edit/_advanced.html.twig
+++ b/templates/parts/edit/_advanced.html.twig
@@ -13,4 +13,5 @@
     {{ form_row(form.ipn) }}
 </div>
 {{ form_row(form.partUnit) }}
-{{ form_row(form.partCustomState) }}
\ No newline at end of file
+{{ form_row(form.partCustomState) }}
+{{ form_row(form.gtin) }}
diff --git a/tests/Validator/Constraints/ValidGTINValidatorTest.php b/tests/Validator/Constraints/ValidGTINValidatorTest.php
new file mode 100644
index 00000000..f35b053a
--- /dev/null
+++ b/tests/Validator/Constraints/ValidGTINValidatorTest.php
@@ -0,0 +1,72 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2026 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace App\Tests\Validator\Constraints;
+
+use App\Validator\Constraints\ValidGTINValidator;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Validator\ConstraintValidatorInterface;
+use Symfony\Component\Validator\Test\ConstraintValidatorTestCase;
+
+class ValidGTINValidatorTest extends ConstraintValidatorTestCase
+{
+
+    public function testAllowNull(): void
+    {
+        $this->validator->validate(null, new \App\Validator\Constraints\ValidGTIN());
+        $this->assertNoViolation();
+    }
+
+    public function testValidGTIN8(): void
+    {
+        $this->validator->validate('12345670', new \App\Validator\Constraints\ValidGTIN());
+        $this->assertNoViolation();
+    }
+
+    public function testValidGTIN12(): void
+    {
+        $this->validator->validate('123456789012', new \App\Validator\Constraints\ValidGTIN());
+        $this->assertNoViolation();
+    }
+
+    public function testValidGTIN13(): void
+    {
+        $this->validator->validate('1234567890128', new \App\Validator\Constraints\ValidGTIN());
+        $this->assertNoViolation();
+    }
+
+    public function testValidGTIN14(): void
+    {
+        $this->validator->validate('12345678901231', new \App\Validator\Constraints\ValidGTIN());
+        $this->assertNoViolation();
+    }
+
+    public function testInvalidGTIN(): void
+    {
+        $this->validator->validate('1234567890123', new \App\Validator\Constraints\ValidGTIN());
+        $this->buildViolation('validator.invalid_gtin')
+            ->assertRaised();
+    }
+
+    protected function createValidator(): ConstraintValidatorInterface
+    {
+        return new ValidGTINValidator();
+    }
+}
diff --git a/translations/messages.en.xlf b/translations/messages.en.xlf
index 5692ed25..66053133 100644
--- a/translations/messages.en.xlf
+++ b/translations/messages.en.xlf
@@ -12401,5 +12401,11 @@ Buerklin-API Authentication server:
         <target>Update to</target>
       </segment>
     </unit>
+    <unit id="XPhnMxn" name="part.gtin">
+      <segment>
+        <source>part.gtin</source>
+        <target>GTIN / EAN</target>
+      </segment>
+    </unit>
   </file>
-</xliff>
\ No newline at end of file
+</xliff>
diff --git a/translations/validators.en.xlf b/translations/validators.en.xlf
index e2e70d03..ed824f0b 100644
--- a/translations/validators.en.xlf
+++ b/translations/validators.en.xlf
@@ -247,5 +247,11 @@
         <target>There is already a translation defined for this type and language!</target>
       </segment>
     </unit>
+    <unit id="zT_j_oQ" name="validator.invalid_gtin">
+      <segment>
+        <source>validator.invalid_gtin</source>
+        <target>This is not an valid GTIN / EAN!</target>
+      </segment>
+    </unit>
   </file>
-</xliff>
\ No newline at end of file
+</xliff>