diff --git a/src/_app/pages/CreateMessagePage/Steps/PhotoInputStep/index.tsx b/src/_app/pages/CreateMessagePage/Steps/PhotoInputStep/index.tsx
index ad153c4..25d23a1 100644
--- a/src/_app/pages/CreateMessagePage/Steps/PhotoInputStep/index.tsx
+++ b/src/_app/pages/CreateMessagePage/Steps/PhotoInputStep/index.tsx
@@ -4,55 +4,79 @@ import StepHeader from "@/components/Funnel/StepHeader";
 import useToast from "@/hooks/useToast";
 import { Photo } from "@/types/client";
 import { isNill, isUndefined } from "@/utils";
+import { convertToWebP } from "@/utils/convertToWebP";
 import clsx from "clsx";
-import { ChangeEvent, useRef } from "react";
+import { ChangeEvent, useCallback, useRef } from "react";
 import { useWindowSize } from "react-use";
 
 interface Props {
   photo: Photo | undefined;
-  setPhoto: (newPhoto: Photo) => void;
+  setPhoto: (newPhoto: Photo | undefined) => void;
+  maxSizeMB?: number;
+  maxWidth?: number;
+  maxHeight?: number;
+  quality?: number;
 }
-const PhotoInputStep = ({ photo, setPhoto }: Props) => {
+const PhotoInputStep = ({
+  photo,
+  setPhoto,
+  maxSizeMB = 5,
+  maxWidth = 1920,
+  maxHeight = 1080,
+  quality = 0.8,
+}: Props) => {
   const { setGlobalLoading } = useLoadingOverlay();
   const inputRef = useRef<HTMLInputElement>(null);
   const { showToast } = useToast();
-  const onClickUpload = () => {
-    if (isNill(inputRef.current)) {
-      return;
-    }
 
+  const handleImageConvert = useCallback(
+    async (file: File): Promise<Photo> => {
+      return convertToWebP(file, { maxWidth, maxHeight, quality });
+    },
+    [maxWidth, maxHeight, quality]
+  );
+
+  const onClickUpload = () => {
+    if (isNill(inputRef.current)) return;
     inputRef.current.click();
   };
-  const onChange = async (event: ChangeEvent<HTMLInputElement>) => {
-    if (isNill(event.target) || isNill(event.target.files)) {
-      showToast("이미지를 불러오는 데 실패했어요.", "error");
 
-      return;
-    }
+  const onChange = async (event: ChangeEvent<HTMLInputElement>) => {
+    try {
+      if (isNill(event.target) || isNill(event.target.files)) {
+        showToast("이미지를 불러오는 데 실패했어요.", "error");
+        return;
+      }
+      const file = event.target.files[0];
+      setGlobalLoading(true);
 
-    const file = event.target.files[0];
-    setGlobalLoading(true);
+      const maxSize = maxSizeMB * 1024 * 1024; // 10MB
+      if (file.size > maxSize) {
+        setGlobalLoading(false);
+        showToast("이미지 용량이 너무 커요.", "error");
+        return;
+      }
 
-    const maxSize = 5 * 1024 * 1024; // 10MB
-    if (file.size > maxSize) {
+      const optimizedPhoto = await handleImageConvert(file);
+      setPhoto(optimizedPhoto);
+    } catch (error) {
+      showToast("이미지 처리 중 오류가 발생했어요.", "error");
+    } finally {
       setGlobalLoading(false);
-      showToast("이미지 용량이 너무 커요.", "error");
-
-      return;
+      if (inputRef.current) {
+        inputRef.current.value = "";
+      }
     }
+  };
 
-    const fileUrl = URL.createObjectURL(file);
-
-    const img = new window.Image();
-    img.src = fileUrl;
-    img.onload = () =>
-      setPhoto({
-        file,
-        url: fileUrl,
-      });
-    setGlobalLoading(false);
+  const handleRemoveImage = () => {
+    if (photo?.url) {
+      URL.revokeObjectURL(photo.url);
+    }
+    setPhoto(undefined);
   };
 
+
   const { height } = useWindowSize();
 
   return (
@@ -84,12 +108,16 @@ const PhotoInputStep = ({ photo, setPhoto }: Props) => {
             <img
               src={photo.url}
               className={clsx("w-full h-full rounded-[15px] object-contain")}
+              alt="업로드된 이미지"
+              onDoubleClick={handleRemoveImage}
             />
           )}
         </div>
         <div className="h-[18px]" />
         <p className="text-[#A1A1A1] text-[14px] text-center">
-          사진은 최대 1장, 5mb까지 업로드 가능해요.
+        {isUndefined(photo)
+            ? `사진은 최대 1장, ${maxSizeMB}mb까지 업로드 가능해요.`
+            : "이미지를 더블클릭하면 제거할 수 있어요."}
         </p>
       </div>
       <input
diff --git a/src/utils/convertToWebP.ts b/src/utils/convertToWebP.ts
new file mode 100644
index 0000000..2c74b95
--- /dev/null
+++ b/src/utils/convertToWebP.ts
@@ -0,0 +1,175 @@
+import { Photo } from "@/types/client";
+
+interface ImageDimension {
+  width: number;
+  height: number;
+}
+
+interface ImageConverterConfig {
+  maxWidth: number;
+  maxHeight: number;
+  quality: number;
+}
+
+/**
+ * 원본 이미지의 종횡비를 유지하면서 최대 허용 크기 조정
+ * @param original - 원본 이미지 크기
+ * @param max - 최대 허용 크기
+ * @returns 조정된 이미지 크기
+ */
+const calculateAspectRatio = (
+  original: ImageDimension,
+  max: ImageDimension
+): ImageDimension => {
+  let { width, height } = original;
+
+  if (width > max.width) {
+    height = (height * max.width) / width;
+    width = max.width;
+  }
+
+  if (height > max.height) {
+    width = (width * max.height) / height;
+    height = max.height;
+  }
+
+  return {
+    width: Math.floor(width),
+    height: Math.floor(height),
+  };
+};
+
+/**
+ * 지정된 크기의 Canvas 엘리먼트 생성
+ * @param dimension - Canvas 크기
+ * @returns HTMLCanvasElement
+ */
+const createCanvas = (dimension: ImageDimension): HTMLCanvasElement => {
+  const canvas = document.createElement("canvas");
+  canvas.width = dimension.width;
+  canvas.height = dimension.height;
+  return canvas;
+};
+
+/**
+ * Canvas에 이미지를 그림
+ * @param canvas - 대상 Canvas 엘리먼트
+ * @param image - 그릴 이미지
+ * @throws Canvas context를 얻을 수 없는 경우
+ * @returns 이미지가 그려진 Canvas
+ */
+const drawImageToCanvas = (
+  canvas: HTMLCanvasElement,
+  image: HTMLImageElement
+): HTMLCanvasElement | never => {
+  const ctx = canvas.getContext("2d");
+  if (!ctx) throw new Error("Canvas context not available");
+
+  ctx.drawImage(image, 0, 0, canvas.width, canvas.height);
+  return canvas;
+};
+
+
+//TODO : 서버 정책으로 인한 avif ,webp 등 400에러 
+//code : 504 , message : 이미지 파일만 업로드 가능합니다.
+
+/**
+ * Canvas를 WebP 형식으로 변환
+ * @param canvas - 변환할 Canvas
+ * @param fileName - 원본 파일 이름
+ * @param quality - 압축 품질 (0~1)
+ * @returns Promise<Photo>
+ */
+const canvasToWebP = (
+  canvas: HTMLCanvasElement,
+  fileName: string,
+  quality: number
+): Promise<Photo> =>
+  new Promise((resolve, reject) => {
+    canvas.toBlob(
+      (blob) => {
+        if (!blob) {
+          reject(new Error("Blob creation failed"));
+          return;
+        }
+
+        const webpFile = new File(
+          [blob],
+          fileName.replace(/\.[^/.]+$/, ".jpeg"),
+          {
+            type: "image/jpeg",
+          }
+        );
+        const webpUrl = URL.createObjectURL(blob);
+
+        resolve({
+          file: webpFile,
+          url: webpUrl,
+        });
+      },
+      "image/jpeg",
+      quality
+    );
+  });
+
+const loadImage = (objectUrl: string): Promise<HTMLImageElement> =>
+  new Promise((resolve, reject) => {
+    const img = new Image();
+    img.onload = () => resolve(img);
+    img.onerror = () => reject(new Error("Image loading failed"));
+    img.src = objectUrl;
+  });
+
+/**
+ * File 객체를 Data URL로 변환
+ * @param file - 변환할 File 객체
+ * @returns Promise<string>
+ */
+const fileToObjectUrl = (file: File): Promise<string> =>
+  new Promise((resolve, reject) => {
+    const reader = new FileReader();
+    reader.onload = (e) => resolve(e.target?.result as string);
+    reader.onerror = () => reject(new Error("File reading failed"));
+    reader.readAsDataURL(file);
+  });
+
+/**
+ * 이미지 파일을 WebP 형식으로 변환
+ * 
+ * @param file - 변환할 이미지 파일
+ * @param config - 변환 설정
+ * @param config.maxWidth - 최대 허용 너비
+ * @param config.maxHeight - 최대 허용 높이
+ * @param config.quality - 압축 품질 (0~1)
+ *
+ * @returns Promise<Photo> - 변환된 이미지 정보
+ * @throws {Error} 이미지 로드 실패, Canvas 생성 실패 등의 경우
+ *
+ * @example
+ * const optimizedImage = await convertToWebP(file, {
+ *   maxWidth: 1920,
+ *   maxHeight: 1080,
+ *   quality: 0.8
+ * });
+ */
+const convertToWebP = async (
+  file: File,
+  config: ImageConverterConfig
+): Promise<Photo> => {
+  const objectUrl = await fileToObjectUrl(file);
+  const image = await loadImage(objectUrl);
+
+  const dimension = calculateAspectRatio(
+    { width: image.width, height: image.height },
+    { width: config.maxWidth, height: config.maxHeight }
+  );
+
+  const canvas = createCanvas(dimension);
+  const drawnCanvas = drawImageToCanvas(canvas, image);
+  const webpImage = await canvasToWebP(drawnCanvas, file.name, config.quality);
+
+  URL.revokeObjectURL(objectUrl);
+  return webpImage;
+};
+
+export { convertToWebP };