diff --git a/src/AI/AIProvider.php b/src/AI/AIProvider.php
index 95ce083..82041d3 100644
--- a/src/AI/AIProvider.php
+++ b/src/AI/AIProvider.php
@@ -367,6 +367,7 @@ protected function getTranslatedObjects(): array
         return match ($this->configProvider) {
             'anthropic' => $this->getTranslatedObjectsFromAnthropic(),
             'openai' => $this->getTranslatedObjectsFromOpenAI(),
+            'fake' => $this->getTranslatedObjectsFromFake(),
             default => throw new \Exception("Provider {$this->configProvider} is not supported."),
         };
     }
@@ -444,6 +445,37 @@ function ($chunk, $data) use (&$responseText, $responseParser) {
         return $responseParser->getTranslatedItems();
     }
 
+    protected function getTranslatedObjectsFromFake(): array
+    {
+        $items = [];
+        foreach ($this->strings as $key => $value) {
+            $localized = new LocalizedString();
+            $localized->key = $key;
+            $localized->translated = '[' . $this->targetLanguageObj->code . '] ' . $value;
+            $items[] = $localized;
+        }
+
+        // Simulate minimal token usage for offline mode
+        $this->inputTokens = count($this->strings);
+        $this->outputTokens = count($this->strings);
+        $this->totalTokens = $this->inputTokens + $this->outputTokens;
+
+        if ($this->onTranslated) {
+            foreach ($items as $item) {
+                ($this->onTranslated)($item, TranslationStatus::STARTED, $items);
+                ($this->onTranslated)($item, TranslationStatus::COMPLETED, $items);
+            }
+        }
+
+        if ($this->onTokenUsage) {
+            $tokenUsage = $this->getTokenUsage();
+            $tokenUsage['final'] = true;
+            ($this->onTokenUsage)($tokenUsage);
+        }
+
+        return $items;
+    }
+
     protected function getTranslatedObjectsFromAnthropic(): array
     {
         $client = new AnthropicClient(config('ai-translator.ai.api_key'));
diff --git a/tests/Feature/Console/TranslateStringsTest.php b/tests/Feature/Console/TranslateStringsTest.php
index 619cfd2..b3348e3 100644
--- a/tests/Feature/Console/TranslateStringsTest.php
+++ b/tests/Feature/Console/TranslateStringsTest.php
@@ -16,6 +16,11 @@ function checkApiKeysExistForFeature(): bool {
 beforeEach(function () {
     // Check if API keys exist
     $this->hasApiKeys = checkApiKeysExistForFeature();
+    if (!$this->hasApiKeys) {
+        // Use fake provider when API keys are missing so tests can run offline
+        Config::set('ai-translator.ai.provider', 'fake');
+        $this->hasApiKeys = true;
+    }
     
     // Set up test language file directory
     $this->testLangPath = __DIR__ . '/../../Fixtures/lang';
diff --git a/tests/Unit/AI/AIProviderTest.php b/tests/Unit/AI/AIProviderTest.php
index d19e0e7..aae3e36 100644
--- a/tests/Unit/AI/AIProviderTest.php
+++ b/tests/Unit/AI/AIProviderTest.php
@@ -12,10 +12,14 @@ function checkApiKeysExist(): bool {
 
 beforeEach(function() {
     $this->hasApiKeys = checkApiKeysExist();
+    if (!$this->hasApiKeys) {
+        config()->set('ai-translator.ai.provider', 'fake');
+        $this->hasApiKeys = true;
+    }
 });
 
 test('environment variables are loaded from .env.testing', function () {
-    if (!$this->hasApiKeys) {
+    if (empty(env('OPENAI_API_KEY')) || empty(env('ANTHROPIC_API_KEY'))) {
         $this->markTestSkipped('API keys not found in environment. Skipping test.');
     }
     
@@ -31,7 +35,7 @@ function checkApiKeysExist(): bool {
 });
 
 test('can translate strings using OpenAI', function () {
-    if (!$this->hasApiKeys || empty(env('OPENAI_API_KEY'))) {
+    if (empty(env('OPENAI_API_KEY'))) {
         $this->markTestSkipped('OpenAI API key not found in environment. Skipping test.');
     }
     
@@ -51,7 +55,7 @@ function checkApiKeysExist(): bool {
 });
 
 test('can translate strings using Anthropic', function () {
-    if (!$this->hasApiKeys || empty(env('ANTHROPIC_API_KEY'))) {
+    if (empty(env('ANTHROPIC_API_KEY'))) {
         $this->markTestSkipped('Anthropic API key not found in environment. Skipping test.');
     }
     
@@ -86,3 +90,20 @@ function checkApiKeysExist(): bool {
     expect(fn() => $method->invoke($provider))
         ->toThrow(\Exception::class, 'Provider unsupported is not supported.');
 });
+
+test('can translate strings using fake provider', function () {
+    config()->set('ai-translator.ai.provider', 'fake');
+
+    $provider = new AIProvider(
+        'test.php',
+        ['greeting' => 'Hello, world!'],
+        'en',
+        'ko'
+    );
+
+    $result = $provider->translate();
+
+    expect($result)->toBeArray()
+        ->toHaveCount(1);
+    expect($result[0]->translated)->toContain('[ko]');
+});