diff --git a/src/main/java/com/webeye/backend/global/error/ErrorCode.java b/src/main/java/com/webeye/backend/global/error/ErrorCode.java
index 4a30a8e..49a5b64 100644
--- a/src/main/java/com/webeye/backend/global/error/ErrorCode.java
+++ b/src/main/java/com/webeye/backend/global/error/ErrorCode.java
@@ -13,6 +13,7 @@ public enum ErrorCode {
     FILE_EXTENSION_NOT_FOUND(HttpStatus.BAD_REQUEST, "URL에서 확장자를 찾을 수 없습니다."),
     UNSUPPORTED_IMAGE_TYPE(HttpStatus.BAD_REQUEST, "지원하지 않는 이미지 형식입니다."),
     INVALID_IMAGE_URL(HttpStatus.BAD_REQUEST, "잘못된 이미지 URL입니다."),
+    NO_IMAGE_FILE_EXTENSION_FOUND(HttpStatus.BAD_REQUEST, "이미지 확장자가 없습니다."),
 
     // image url extract
     IMAGE_URL_NOT_FOUND(HttpStatus.NOT_FOUND, "이미지의 URL이 추출되지 않았습니다."),
diff --git a/src/main/java/com/webeye/backend/imageanalysis/infrastructure/OpenAiClient.java b/src/main/java/com/webeye/backend/imageanalysis/infrastructure/OpenAiClient.java
index 3d2eb1c..4faf91a 100644
--- a/src/main/java/com/webeye/backend/imageanalysis/infrastructure/OpenAiClient.java
+++ b/src/main/java/com/webeye/backend/imageanalysis/infrastructure/OpenAiClient.java
@@ -27,8 +27,7 @@
 import java.net.MalformedURLException;
 import java.util.List;
 
-import static com.webeye.backend.global.error.ErrorCode.FILE_EXTENSION_NOT_FOUND;
-import static com.webeye.backend.global.error.ErrorCode.INVALID_IMAGE_URL;
+import static com.webeye.backend.global.error.ErrorCode.*;
 
 @Slf4j
 @Component
@@ -202,7 +201,8 @@ public ImageAnalysisResponse explainImage(ImageAnalysisRequest request) {
                 """;
 
         ImageAnalysisPrompt prompt = new ImageAnalysisPrompt(system, user);
-        return callWithStructuredOutput(List.of(request.url()), prompt, ImageAnalysisResponse.class);
+
+        return callWithStructuredOutput(List.of(trimImageUrl(request.url())), prompt, ImageAnalysisResponse.class);
     }
 
     private <T> T callWithStructuredOutput(List<String> urls, ImageAnalysisPrompt prompt, Class<T> clazz) {
@@ -237,6 +237,18 @@ private String extractFileExtension(String url) {
         return fileName.substring(dotIndex + 1);
     }
 
+    private String trimImageUrl(String url) {
+        for (ImageMimeType type : ImageMimeType.values()) {
+            String extension = "." + type.name().toLowerCase();
+            int index = url.toLowerCase().indexOf(extension);
+            if (index != -1) {
+                int endIndex = index + extension.length();
+                return url.substring(0, endIndex);
+            }
+        }
+        throw new BusinessException(NO_IMAGE_FILE_EXTENSION_FOUND);
+    }
+
 
     public RawMaterialAiResponse explainRawMaterial(FoodProductAnalysisRequest request) {
         Message systemMessage = new SystemMessage("""
diff --git a/src/main/java/com/webeye/backend/imageanalysis/presentation/swagger/ImageAnalysisSwagger.java b/src/main/java/com/webeye/backend/imageanalysis/presentation/swagger/ImageAnalysisSwagger.java
index 0d48894..f9ea9c9 100644
--- a/src/main/java/com/webeye/backend/imageanalysis/presentation/swagger/ImageAnalysisSwagger.java
+++ b/src/main/java/com/webeye/backend/imageanalysis/presentation/swagger/ImageAnalysisSwagger.java
@@ -19,6 +19,10 @@ public interface ImageAnalysisSwagger {
             @ApiResponse(
                     responseCode = "200",
                     description = "이미지가 성공적으로 분석되었습니다."
+            ),
+            @ApiResponse(
+                    responseCode = "400",
+                    description = "이미지 확장자가 없습니다."
             )
     })
     SuccessResponse<ImageAnalysisResponse> imageAnalysis(