diff --git a/src/Bundle/ChillDocStoreBundle/Service/StoredObjectToPdfConverter.php b/src/Bundle/ChillDocStoreBundle/Service/StoredObjectToPdfConverter.php
new file mode 100644
index 000000000..abfcca4cc
--- /dev/null
+++ b/src/Bundle/ChillDocStoreBundle/Service/StoredObjectToPdfConverter.php
@@ -0,0 +1,75 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\DocStoreBundle\Service;
+
+use Chill\DocStoreBundle\Entity\StoredObject;
+use Chill\DocStoreBundle\Entity\StoredObjectPointInTime;
+use Chill\DocStoreBundle\Entity\StoredObjectPointInTimeReasonEnum;
+use Chill\DocStoreBundle\Entity\StoredObjectVersion;
+use Chill\DocStoreBundle\Exception\StoredObjectManagerException;
+use Chill\WopiBundle\Service\WopiConverter;
+use Symfony\Component\Mime\MimeTypesInterface;
+
+/**
+ * Class StoredObjectToPdfConverter.
+ *
+ * Converts stored objects to PDF or other specified formats using WopiConverter.
+ */
+class StoredObjectToPdfConverter
+{
+    public function __construct(
+        private readonly StoredObjectManagerInterface $storedObjectManager,
+        private readonly WopiConverter $wopiConverter,
+        private readonly MimeTypesInterface $mimeTypes,
+    ) {}
+
+    /**
+     * Converts the given stored object to a specified format and stores the new version.
+     *
+     * @param StoredObject $storedObject the stored object to be converted
+     * @param string       $lang         the language for the conversion context
+     * @param string       $convertTo    The target format for the conversion. Default is 'pdf'.
+     *
+     * @return array{0: StoredObjectPointInTime, 1: StoredObjectVersion} contains the point in time before conversion and the new version of the stored object
+     *
+     * @throws \UnexpectedValueException    if the preferred mime type for the conversion is not found
+     * @throws \RuntimeException            if the conversion or storage of the new version fails
+     * @throws StoredObjectManagerException
+     */
+    public function addConvertedVersion(StoredObject $storedObject, string $lang, $convertTo = 'pdf'): array
+    {
+        $newMimeType = $this->mimeTypes->getMimeTypes($convertTo)[0] ?? null;
+
+        if (null === $newMimeType) {
+            throw new \UnexpectedValueException(sprintf('could not find a preferred mime type for conversion to %s', $convertTo));
+        }
+
+        $currentVersion = $storedObject->getCurrentVersion();
+
+        if ($currentVersion->getType() === $newMimeType) {
+            throw new \UnexpectedValueException('Already at the same mime type');
+        }
+
+        $content = $this->storedObjectManager->read($currentVersion);
+
+        try {
+            $converted = $this->wopiConverter->convert($lang, $content, $newMimeType, $convertTo);
+        } catch (\RuntimeException $e) {
+            throw new \RuntimeException('could not store a new version for document', previous: $e);
+        }
+
+        $pointInTime = new StoredObjectPointInTime($currentVersion, StoredObjectPointInTimeReasonEnum::KEEP_BEFORE_CONVERSION);
+        $version = $this->storedObjectManager->write($storedObject, $converted, $newMimeType);
+
+        return [$pointInTime, $version];
+    }
+}
diff --git a/src/Bundle/ChillDocStoreBundle/Tests/Service/StoredObjectToPdfConverterTest.php b/src/Bundle/ChillDocStoreBundle/Tests/Service/StoredObjectToPdfConverterTest.php
new file mode 100644
index 000000000..da3ed9210
--- /dev/null
+++ b/src/Bundle/ChillDocStoreBundle/Tests/Service/StoredObjectToPdfConverterTest.php
@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\DocStoreBundle\Tests\Service;
+
+use Chill\DocStoreBundle\Entity\StoredObject;
+use Chill\DocStoreBundle\Entity\StoredObjectPointInTime;
+use Chill\DocStoreBundle\Entity\StoredObjectVersion;
+use Chill\DocStoreBundle\Service\StoredObjectManagerInterface;
+use Chill\DocStoreBundle\Service\StoredObjectToPdfConverter;
+use Chill\WopiBundle\Service\WopiConverter;
+use PHPUnit\Framework\TestCase;
+use Prophecy\PhpUnit\ProphecyTrait;
+use Symfony\Component\Mime\MimeTypes;
+
+/**
+ * @internal
+ *
+ * @coversNothing
+ */
+class StoredObjectToPdfConverterTest extends TestCase
+{
+    use ProphecyTrait;
+
+    public function testAddConvertedVersion(): void
+    {
+        $storedObject = new StoredObject();
+        $currentVersion = $storedObject->registerVersion(type: 'text/html');
+
+        $storedObjectManager = $this->prophesize(StoredObjectManagerInterface::class);
+        $storedObjectManager->read($currentVersion)->willReturn('1234');
+        $storedObjectManager->write($storedObject, '5678', 'application/pdf')->shouldBeCalled()
+            ->will(function ($args) {
+                /** @var StoredObject $storedObject */
+                $storedObject = $args[0];
+
+                return $storedObject->registerVersion(type: $args[2]);
+            });
+
+        $converter = $this->prophesize(WopiConverter::class);
+        $converter->convert('fr', '1234', 'application/pdf', 'pdf')->shouldBeCalled()
+            ->willReturn('5678');
+
+        $converter = new StoredObjectToPdfConverter($storedObjectManager->reveal(), $converter->reveal(), MimeTypes::getDefault());
+
+        $actual = $converter->addConvertedVersion($storedObject, 'fr');
+
+        self::assertIsArray($actual);
+        self::assertInstanceOf(StoredObjectPointInTime::class, $actual[0]);
+        self::assertSame($currentVersion, $actual[0]->getObjectVersion());
+        self::assertInstanceOf(StoredObjectVersion::class, $actual[1]);
+    }
+}