diff --git a/src/Command/ConvertUploadsCommand.php b/src/Command/ConvertUploadsCommand.php
new file mode 100644
index 0000000..5358925
--- /dev/null
+++ b/src/Command/ConvertUploadsCommand.php
@@ -0,0 +1,60 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Command;
+
+use App\Entity\Upload;
+use App\Service\Pdf\Sanitizer;
+use App\Service\Upload\UploadHandler;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\Console\Attribute\AsCommand;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Helper\ProgressBar;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+#[AsCommand(name: 'app:uploads:convert', description: 'Converts all uploads to sanitized PDFs')]
+class ConvertUploadsCommand extends Command
+{
+    public function __construct(
+        private readonly EntityManagerInterface $entityManager,
+        private readonly UploadHandler $uploadHandler,
+        private readonly Sanitizer $sanitizer,
+    ) {
+        parent::__construct();
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $uploads = $this
+            ->entityManager
+            ->getRepository(Upload::class)
+            ->findBy([
+                'type' => [Upload::TYPE_INVOICE, Upload::TYPE_CONTRACT],
+            ]);
+
+        $progressBar = new ProgressBar($output, count($uploads));
+        $progressBar->start();
+
+        foreach ($uploads as $upload) {
+            /** @var Upload $upload */
+            $filepath = $this->uploadHandler->getUploadFilepath($upload);
+            try {
+                $targetFilepath = $this->sanitizer->sanitizeFile($filepath);
+                $upload
+                    ->setFilename(basename($targetFilepath))
+                    ->setMimeType('application/pdf')
+                ;
+            } catch (\Throwable $e) {
+            }
+
+            $progressBar->advance();
+        }
+
+        $this->entityManager->flush();
+        $progressBar->finish();
+
+        return Command::SUCCESS;
+    }
+}
diff --git a/src/Service/Pdf/Sanitizer.php b/src/Service/Pdf/Sanitizer.php
index 4915c40..12f9dc5 100644
--- a/src/Service/Pdf/Sanitizer.php
+++ b/src/Service/Pdf/Sanitizer.php
@@ -2,6 +2,7 @@
 
 namespace App\Service\Pdf;
 
+use Symfony\Component\Filesystem\Exception\FileNotFoundException;
 use Symfony\Component\Filesystem\Filesystem;
 use Symfony\Component\Process\Process;
 
@@ -16,11 +17,16 @@ class Sanitizer
 
     /**
      * @throws \InvalidArgumentException
+     * @throws FileNotFoundException
      */
     public function sanitizeFile(string $inputFilepath, ?string $targetFilepath = null, bool $backup = true): string
     {
         $filesystem = new Filesystem();
 
+        if (false === $filesystem->exists($inputFilepath)) {
+            throw new FileNotFoundException();
+        }
+
         if (true === $backup) {
             $parts = pathinfo($inputFilepath);
             $backupFilename = sprintf('%s/%s.orig.%s', $parts['dirname'], $parts['filename'], $parts['extension']);
@@ -32,7 +38,8 @@ class Sanitizer
         $pdfFilepath = null;
 
         if (null === $targetFilepath) {
-            $targetFilepath = $inputFilepath.'.pdf';
+            $parts = pathinfo($inputFilepath);
+            $targetFilepath  = sprintf('%s/%s.%s', $parts['dirname'], $parts['filename'], $parts['extension']);
         }
 
         if ('pdf' !== pathinfo($inputFilepath, PATHINFO_EXTENSION)) {
@@ -51,7 +58,10 @@ class Sanitizer
                 throw new \InvalidArgumentException('File could not be sanitized: '.$process->getErrorOutput());
             }
 
+            $filesystem->remove($inputFilepath);
+
             $inputFilepath = $pdfFilepath;
+            $targetFilepath.= '.pdf';
         }
 
         $command = [
@@ -61,7 +71,7 @@ class Sanitizer
             '-dBATCH',
             '-dPreserveAnnots=false',
             '-sDEVICE=pdfwrite',
-            '-dCompatibilityLevel=1.4',
+            '-dCompatibilityLevel=1.5',
             '-sOutputFile='.$outputFilepath,
             '-f',
             $inputFilepath,