diff --git a/README.md b/README.md
index 8dad80c..c472075 100644
--- a/README.md
+++ b/README.md
@@ -129,6 +129,27 @@ array(3) {
 
 [`TextNodeProcessorInterface`]: src/NodeProcessor/TextNodeProcessorInterface.php
 
+## Passing custom data to `processFile`
+
+`XmlProcessor::processFile()` accepts an optional associative array of custom data.
+It is stored on the [`XmlProcessorContext`], together with the filename currently being processed,
+and is available to every node processor via `$context->getXmlProcessorContext()`.
+
+```php
+$processor->processFile('file.xml', ['tenant' => 'acme']);
+```
+
+```php
+public function openElement(OpenContext $context)
+{
+    $xmlProcessorContext = $context->getXmlProcessorContext();
+    $filename = $xmlProcessorContext->getFilename();
+    $tenant = $xmlProcessorContext->get('tenant');
+}
+```
+
+[`XmlProcessorContext`]: src/XmlProcessorContext.php
+
 [`NodeProcessorContext`]: src/NodeProcessor/Context/NodeProcessorContext.php
 
 [`OpenContext]: src/NodeProcessor/Context/OpenContext.php
diff --git a/src/XmlProcessor.php b/src/XmlProcessor.php
index d17bc60..953a27e 100644
--- a/src/XmlProcessor.php
+++ b/src/XmlProcessor.php
@@ -100,8 +100,13 @@ function getProcessor(string $processorName): ?NodeProcessorInterface
         return $this->context->getProcessor($processorName);
     }
 
-    public function processFile(string $filename): void
+    /**
+     * @param array<string, mixed> $data
+     */
+    public function processFile(string $filename, array $data = []): void
     {
+        $this->context->setFilename($filename);
+        $this->context->setData($data);
         $this->xml->open($filename);
         foreach ($this->parserProperties as $parserProperty => $value) {
             $this->xml->setParserProperty($parserProperty, $value);
diff --git a/src/XmlProcessorContext.php b/src/XmlProcessorContext.php
index 4d00d70..029fe6e 100644
--- a/src/XmlProcessorContext.php
+++ b/src/XmlProcessorContext.php
@@ -18,6 +18,13 @@ class XmlProcessorContext
 
     private Closure $skipNode;
 
+    private string $filename = '';
+
+    /**
+     * @var array<string, mixed>
+     */
+    private array $data = [];
+
     public function __construct(XMLReader $xml, iterable $processors, Closure $skipNode)
     {
         $this->xml = $xml;
@@ -45,4 +52,52 @@ public function getXMLReader(): XMLReader
     {
         return $this->xml;
     }
+
+    public function setFilename(string $filename): void
+    {
+        $this->filename = $filename;
+    }
+
+    public function getFilename(): string
+    {
+        return $this->filename;
+    }
+
+    /**
+     * @param array<string, mixed> $data
+     */
+    public function setData(array $data): void
+    {
+        $this->data = $data;
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function getData(): array
+    {
+        return $this->data;
+    }
+
+    /**
+     * @param mixed $default
+     * @return mixed
+     */
+    public function get(string $key, $default = null)
+    {
+        return $this->data[$key] ?? $default;
+    }
+
+    /**
+     * @param mixed $value
+     */
+    public function set(string $key, $value): void
+    {
+        $this->data[$key] = $value;
+    }
+
+    public function has(string $key): bool
+    {
+        return \array_key_exists($key, $this->data);
+    }
 }
diff --git a/tests/Unit/XmlProcessorContextTest.php b/tests/Unit/XmlProcessorContextTest.php
index 65e4be6..80cdb20 100644
--- a/tests/Unit/XmlProcessorContextTest.php
+++ b/tests/Unit/XmlProcessorContextTest.php
@@ -67,6 +67,51 @@ function skipCurrentNodeDataProvider(): iterable
         yield [false];
     }
 
+    function testGetFilename(): void
+    {
+        $context = new XmlProcessorContext($this->getXMLReaderMock(), [], fn() => true);
+        self::assertSame('', $context->getFilename());
+
+        $context->setFilename('foo.xml');
+        self::assertSame('foo.xml', $context->getFilename());
+    }
+
+    function testGetData(): void
+    {
+        $context = new XmlProcessorContext($this->getXMLReaderMock(), [], fn() => true);
+        self::assertSame([], $context->getData());
+
+        $context->setData(['foo' => 'bar']);
+        self::assertSame(['foo' => 'bar'], $context->getData());
+    }
+
+    function testGet(): void
+    {
+        $context = new XmlProcessorContext($this->getXMLReaderMock(), [], fn() => true);
+        self::assertNull($context->get('foo'));
+        self::assertSame('default', $context->get('foo', 'default'));
+
+        $context->setData(['foo' => 'bar']);
+        self::assertSame('bar', $context->get('foo'));
+    }
+
+    function testSet(): void
+    {
+        $context = new XmlProcessorContext($this->getXMLReaderMock(), [], fn() => true);
+        $context->set('foo', 'bar');
+        self::assertSame('bar', $context->get('foo'));
+        self::assertSame(['foo' => 'bar'], $context->getData());
+    }
+
+    function testHas(): void
+    {
+        $context = new XmlProcessorContext($this->getXMLReaderMock(), [], fn() => true);
+        self::assertFalse($context->has('foo'));
+
+        $context->set('foo', 'bar');
+        self::assertTrue($context->has('foo'));
+    }
+
     private function getXMLReaderMock(): XMLReader
     {
         return $this->getMockBuilder(XMLReader::class)->getMock();
diff --git a/tests/Unit/XmlProcessorTest.php b/tests/Unit/XmlProcessorTest.php
index bb01908..699358b 100644
--- a/tests/Unit/XmlProcessorTest.php
+++ b/tests/Unit/XmlProcessorTest.php
@@ -8,6 +8,7 @@
 use Generator;
 use Netlogix\XmlProcessor\NodeProcessor\CloseNodeProcessorInterface;
 use Netlogix\XmlProcessor\NodeProcessor\Context\CloseContext;
+use Netlogix\XmlProcessor\NodeProcessor\Context\NodeProcessorContext;
 use Netlogix\XmlProcessor\NodeProcessor\Context\OpenContext;
 use Netlogix\XmlProcessor\NodeProcessor\Context\TextContext;
 use Netlogix\XmlProcessor\NodeProcessor\NodeProcessorInterface;
@@ -82,6 +83,28 @@ public function testProcessFile()
         $xmlProcessor->processFile(__DIR__ . '/../Fixtures/XmlProcessorTest/test.xml');
     }
 
+    public function testProcessFile_fillsContextWithFilenameAndData(): void
+    {
+        $filename = __DIR__ . '/../Fixtures/XmlProcessorTest/test.xml';
+        $nodeProcessor = $this->getMockForAbstractClass(NodeProcessorInterface::class);
+
+        $nodeProcessor
+            ->method('getSubscribedEvents')
+            ->will($this->returnCallback(
+                fn() => yield from [
+                    XmlProcessor::EVENT_OPEN_FILE => function (NodeProcessorContext $context) use ($filename): void {
+                        $xmlProcessorContext = $context->getXmlProcessorContext();
+                        self::assertSame($filename, $xmlProcessorContext->getFilename());
+                        self::assertSame(['foo' => 'bar'], $xmlProcessorContext->getData());
+                        self::assertSame('bar', $xmlProcessorContext->get('foo'));
+                    }
+                ]
+            ));
+
+        $xmlProcessor = new XmlProcessor([$nodeProcessor]);
+        $xmlProcessor->processFile($filename, ['foo' => 'bar']);
+    }
+
     public function testProcessFile_skipCurrentNode()
     {
         $nodeProcessor = $this->getMockForAbstractClass(NodeProcessorInterface::class);