diff --git a/src/OpenApiSpecFactory.php b/src/OpenApiSpecFactory.php
new file mode 100644
index 0000000..a229a80
--- /dev/null
+++ b/src/OpenApiSpecFactory.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Osteel\OpenApi\Testing;
+
+use cebe\openapi\Reader;
+use cebe\openapi\SpecObjectInterface;
+
+final class OpenApiSpecFactory implements OpenApiSpecFactoryInterface
+{
+    /** @inheritDoc */
+    public function readFromJsonFile(string $fileName): SpecObjectInterface
+    {
+        return Reader::readFromJsonFile($fileName);
+    }
+
+    /** @inheritDoc */
+    public function readFromYamlFile(string $fileName): SpecObjectInterface
+    {
+        return Reader::readFromYamlFile($fileName);
+    }
+}
diff --git a/src/OpenApiSpecFactoryInterface.php b/src/OpenApiSpecFactoryInterface.php
new file mode 100644
index 0000000..fe21254
--- /dev/null
+++ b/src/OpenApiSpecFactoryInterface.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Osteel\OpenApi\Testing;
+
+use cebe\openapi\spec\OpenApi;
+use cebe\openapi\SpecObjectInterface;
+
+interface OpenApiSpecFactoryInterface
+{
+    /** @return SpecObjectInterface|OpenApi */
+    public function readFromJsonFile(string $fileName): SpecObjectInterface;
+
+    /** @return SpecObjectInterface|OpenApi */
+    public function readFromYamlFile(string $fileName): SpecObjectInterface;
+}
diff --git a/src/ValidatorBuilder.php b/src/ValidatorBuilder.php
index dac8918..3514c69 100644
--- a/src/ValidatorBuilder.php
+++ b/src/ValidatorBuilder.php
@@ -4,6 +4,7 @@
 
 namespace Osteel\OpenApi\Testing;
 
+use Closure;
 use InvalidArgumentException;
 use League\OpenAPIValidation\PSR7\ValidatorBuilder as BaseValidatorBuilder;
 use Osteel\OpenApi\Testing\Adapters\MessageAdapterInterface;
@@ -16,6 +17,9 @@
  */
 final class ValidatorBuilder implements ValidatorBuilderInterface
 {
+    /** @var ?Closure():OpenApiSpecFactoryInterface */
+    private static ?Closure $openApiSpecFactoryResolver = null;
+
     /** @var class-string<MessageAdapterInterface> */
     private string $adapter = HttpFoundationAdapter::class;
 
@@ -33,9 +37,7 @@ public function __construct(private BaseValidatorBuilder $validatorBuilder)
      */
     public static function fromYaml(string $definition): ValidatorBuilderInterface
     {
-        $method = is_file($definition) ? 'fromYamlFile' : 'fromYaml';
-
-        return self::fromMethod($method, $definition);
+        return self::fromYamlFile($definition);
     }
 
     /**
@@ -45,9 +47,7 @@ public static function fromYaml(string $definition): ValidatorBuilderInterface
      */
     public static function fromJson(string $definition): ValidatorBuilderInterface
     {
-        $method = is_file($definition) ? 'fromJsonFile' : 'fromJson';
-
-        return self::fromMethod($method, $definition);
+        return self::fromJsonFile($definition);
     }
 
     /**
@@ -57,7 +57,7 @@ public static function fromJson(string $definition): ValidatorBuilderInterface
      */
     public static function fromYamlFile(string $definition): ValidatorBuilderInterface
     {
-        return self::fromMethod('fromYamlFile', $definition);
+        return self::fromMethod(self::determineMethod($definition, 'yaml'), $definition);
     }
 
     /**
@@ -67,7 +67,7 @@ public static function fromYamlFile(string $definition): ValidatorBuilderInterfa
      */
     public static function fromJsonFile(string $definition): ValidatorBuilderInterface
     {
-        return self::fromMethod('fromJsonFile', $definition);
+        return self::fromMethod(self::determineMethod($definition, 'json'), $definition);
     }
 
     /**
@@ -98,11 +98,51 @@ public static function fromJsonString(string $definition): ValidatorBuilderInter
      */
     private static function fromMethod(string $method, string $definition): ValidatorBuilderInterface
     {
+        $openApiFactory = self::getOpenApiSpecFactory();
+
+        $definition = match ($method) {
+            'fromJsonSchema' => $openApiFactory->readFromJsonFile($definition),
+            'fromYamlSchema' => $openApiFactory->readFromYamlFile($definition),
+            default => $definition,
+        };
+
+        if (in_array($method, ['fromJsonSchema', 'fromYamlSchema'], true)) {
+            $method = 'fromSchema';
+        }
+
         $builder = (new BaseValidatorBuilder())->{$method}($definition);
 
         return new ValidatorBuilder($builder);
     }
 
+    private static function determineMethod(string $definition, string $format): string
+    {
+        if (filter_var($definition, FILTER_VALIDATE_URL) && in_array(parse_url($definition, PHP_URL_SCHEME), ['http', 'https'], true)) {
+            return sprintf('from%sSchema', ucfirst($format));
+        }
+
+        if (is_file($definition)) {
+            return sprintf('from%sFile', ucfirst($format));
+        }
+
+        return sprintf('from%s', ucfirst($format));
+    }
+
+    /** @param ?Closure():OpenApiSpecFactoryInterface $resolver */
+    public static function setOpenApiSpecFactoryResolver(?Closure $resolver = null): void
+    {
+        self::$openApiSpecFactoryResolver = $resolver;
+    }
+
+    public static function getOpenApiSpecFactory(): OpenApiSpecFactoryInterface
+    {
+        if (self::$openApiSpecFactoryResolver === null) {
+            return new OpenApiSpecFactory();
+        }
+
+        return (self::$openApiSpecFactoryResolver)();
+    }
+
     /** @inheritDoc */
     public function setCache(object $cache): ValidatorBuilderInterface
     {
diff --git a/tests/OpenApiSpecFactoryTest.php b/tests/OpenApiSpecFactoryTest.php
new file mode 100644
index 0000000..3864595
--- /dev/null
+++ b/tests/OpenApiSpecFactoryTest.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Osteel\OpenApi\Testing\Tests;
+
+use cebe\openapi\spec\OpenApi;
+use cebe\openapi\SpecObjectInterface;
+use Osteel\OpenApi\Testing\OpenApiSpecFactory;
+
+class OpenApiSpecFactoryTest extends TestCase
+{
+    public function test_it_creates_an_open_api_spec_from_yaml_file(): void
+    {
+        $result = (new OpenApiSpecFactory())->readFromYamlFile(self::$yamlDefinition);
+
+        $this->assertInstanceOf(SpecObjectInterface::class, $result);
+        $this->assertInstanceOf(OpenApi::class, $result);
+    }
+
+    public function test_it_creates_an_open_api_spec_from_json_file(): void
+    {
+        $result = (new OpenApiSpecFactory())->readFromJsonFile(self::$jsonDefinition);
+
+        $this->assertInstanceOf(SpecObjectInterface::class, $result);
+        $this->assertInstanceOf(OpenApi::class, $result);
+    }
+}
diff --git a/tests/ValidatorBuilderTest.php b/tests/ValidatorBuilderTest.php
index f10f023..607ff47 100644
--- a/tests/ValidatorBuilderTest.php
+++ b/tests/ValidatorBuilderTest.php
@@ -4,9 +4,11 @@
 
 namespace Osteel\OpenApi\Testing\Tests;
 
+use cebe\openapi\Reader;
 use InvalidArgumentException;
 use Osteel\OpenApi\Testing\Adapters\MessageAdapterInterface;
 use Osteel\OpenApi\Testing\Cache\CacheAdapterInterface;
+use Osteel\OpenApi\Testing\OpenApiSpecFactoryInterface;
 use Osteel\OpenApi\Testing\Validator;
 use Osteel\OpenApi\Testing\ValidatorBuilder;
 use stdClass;
@@ -42,6 +44,30 @@ public function test_it_builds_a_validator(string $method, string $definition)
         $this->assertTrue($result->get($response, static::PATH));
     }
 
+    public function test_it_builds_a_validator_given_a_absolute_url(): void
+    {
+        $url = 'https://foobar.localhost/openapi.yaml';
+
+        $openApiFactory = $this->createMock(OpenApiSpecFactoryInterface::class);
+        $openApiFactory->expects($this->once())
+            ->method('readFromYamlFile')
+            ->with($url)
+            ->willReturn(Reader::readFromYamlFile(self::$yamlDefinition));
+
+        ValidatorBuilder::setOpenApiSpecFactoryResolver(fn () => $openApiFactory);
+
+        $result = ValidatorBuilder::fromYaml($url)->getValidator();
+
+        $this->assertInstanceOf(Validator::class, $result);
+
+        $request = $this->httpFoundationRequest(static::PATH, 'get', ['foo' => 'bar']);
+        $response = $this->httpFoundationResponse(['foo' => 'bar']);
+
+        // Validate a request and a response to make sure the definition was correctly parsed.
+        $this->assertTrue($result->get($request, static::PATH));
+        $this->assertTrue($result->get($response, static::PATH));
+    }
+
     public function test_it_does_not_set_the_adapter_because_its_type_is_invalid()
     {
         $this->expectException(InvalidArgumentException::class);