diff --git a/internal/service/uploader/upload.go b/internal/service/uploader/upload.go
index 3dc2fa0f..88ca9d5f 100644
--- a/internal/service/uploader/upload.go
+++ b/internal/service/uploader/upload.go
@@ -39,14 +39,11 @@ var (
 		postSubPath,
 		brandingSubPath,
 	}
-	FormatExts = map[string]imaging.Format{
+	supportedThumbFileExtMapping = map[string]imaging.Format{
 		".jpg":  imaging.JPEG,
 		".jpeg": imaging.JPEG,
 		".png":  imaging.PNG,
 		".gif":  imaging.GIF,
-		//".tif":  imaging.TIFF,
-		//".tiff": imaging.TIFF,
-		//".bmp":  imaging.BMP,
 	}
 )
 
@@ -95,7 +92,7 @@ func (us *uploaderService) UploadAvatarFile(ctx *gin.Context) (url string, err e
 		return "", errors.BadRequest(reason.RequestFormatError).WithError(err)
 	}
 	fileExt := strings.ToLower(path.Ext(file.Filename))
-	if _, ok := FormatExts[fileExt]; !ok {
+	if _, ok := plugin.DefaultFileTypeCheckMapping[plugin.UserAvatar][fileExt]; !ok {
 		return "", errors.BadRequest(reason.RequestFormatError).WithError(err)
 	}
 
@@ -105,6 +102,11 @@ func (us *uploaderService) UploadAvatarFile(ctx *gin.Context) (url string, err e
 }
 
 func (us *uploaderService) AvatarThumbFile(ctx *gin.Context, fileName string, size int) (url string, err error) {
+	fileSuffix := path.Ext(fileName)
+	if _, ok := supportedThumbFileExtMapping[fileSuffix]; !ok {
+		// if file type is not supported, return original file
+		return path.Join(us.serviceConfig.UploadPath, avatarSubPath, fileName), nil
+	}
 	if size > 1024 {
 		size = 1024
 	}
@@ -115,7 +117,7 @@ func (us *uploaderService) AvatarThumbFile(ctx *gin.Context, fileName string, si
 	if err == nil {
 		return thumbFilePath, nil
 	}
-	filePath := fmt.Sprintf("%s/avatar/%s", us.serviceConfig.UploadPath, fileName)
+	filePath := fmt.Sprintf("%s/%s/%s", us.serviceConfig.UploadPath, avatarSubPath, fileName)
 	avatarFile, err = os.ReadFile(filePath)
 	if err != nil {
 		return "", errors.InternalServer(reason.UnknownError).WithError(err).WithStack()
@@ -126,14 +128,9 @@ func (us *uploaderService) AvatarThumbFile(ctx *gin.Context, fileName string, si
 		return "", errors.InternalServer(reason.UnknownError).WithError(err).WithStack()
 	}
 
-	fileSuffix := path.Ext(fileName)
-	if _, ok := FormatExts[fileSuffix]; !ok {
-		return "", fmt.Errorf("unsupported image format: %s", fileSuffix)
-	}
-
 	var buf bytes.Buffer
 	newImage := imaging.Fill(img, size, size, imaging.Center, imaging.Linear)
-	if err = imaging.Encode(&buf, newImage, FormatExts[fileSuffix]); err != nil {
+	if err = imaging.Encode(&buf, newImage, supportedThumbFileExtMapping[fileSuffix]); err != nil {
 		return "", errors.InternalServer(reason.UnknownError).WithError(err).WithStack()
 	}
 
@@ -173,7 +170,7 @@ func (us *uploaderService) UploadPostFile(ctx *gin.Context) (
 		return "", errors.BadRequest(reason.RequestFormatError).WithError(err)
 	}
 	fileExt := strings.ToLower(path.Ext(file.Filename))
-	if _, ok := FormatExts[fileExt]; !ok {
+	if _, ok := plugin.DefaultFileTypeCheckMapping[plugin.UserPost][fileExt]; !ok {
 		return "", errors.BadRequest(reason.RequestFormatError).WithError(err)
 	}
 
@@ -199,8 +196,7 @@ func (us *uploaderService) UploadBrandingFile(ctx *gin.Context) (
 		return "", errors.BadRequest(reason.RequestFormatError).WithError(err)
 	}
 	fileExt := strings.ToLower(path.Ext(file.Filename))
-	_, ok := FormatExts[fileExt]
-	if !ok && fileExt != ".ico" {
+	if _, ok := plugin.DefaultFileTypeCheckMapping[plugin.AdminBranding][fileExt]; !ok {
 		return "", errors.BadRequest(reason.RequestFormatError).WithError(err)
 	}
 
@@ -226,14 +222,14 @@ func (us *uploaderService) uploadFile(ctx *gin.Context, file *multipart.FileHead
 	}
 	defer src.Close()
 
-	if err := removeExif(filePath); err != nil {
-		log.Error(err)
-	}
-
 	if !checker.IsSupportedImageFile(src, filepath.Ext(fileSubPath)) {
 		return "", errors.BadRequest(reason.UploadFileUnsupportedFileFormat)
 	}
 
+	if err := removeExif(filePath); err != nil {
+		log.Error(err)
+	}
+
 	url = fmt.Sprintf("%s/uploads/%s", siteGeneral.SiteUrl, fileSubPath)
 	return url, nil
 }
@@ -256,8 +252,8 @@ func (us *uploaderService) tryToUploadByPlugin(ctx *gin.Context, source plugin.U
 // removeExif remove exif
 // only support jpg/jpeg/png
 func removeExif(path string) error {
-	ext := strings.ToUpper(strings.TrimPrefix(filepath.Ext(path), "."))
-	if ext != "JPEG" && ext != "JPG" && ext != "PNG" {
+	ext := strings.ToLower(strings.TrimPrefix(filepath.Ext(path), "."))
+	if ext != "jpeg" && ext != "jpg" && ext != "png" {
 		return nil
 	}
 	img, err := os.ReadFile(path)
diff --git a/pkg/checker/file_type.go b/pkg/checker/file_type.go
index 24845ab5..d30c369f 100644
--- a/pkg/checker/file_type.go
+++ b/pkg/checker/file_type.go
@@ -1,6 +1,7 @@
 package checker
 
 import (
+	"golang.org/x/image/webp"
 	"image"
 	_ "image/gif" // use init to support decode jpeg,jpg,png,gif
 	_ "image/jpeg"
@@ -9,16 +10,19 @@ import (
 	"strings"
 )
 
-// IsSupportedImageFile currently answers support image type is `image/jpeg,image/jpg,image/png, image/gif`
+// IsSupportedImageFile currently answers support image type is
+// `image/jpeg, image/jpg, image/png, image/gif, image/webp`
 func IsSupportedImageFile(file io.Reader, ext string) bool {
-	ext = strings.TrimPrefix(ext, ".")
+	ext = strings.ToLower(strings.TrimPrefix(ext, "."))
 	var err error
-	switch strings.ToUpper(ext) {
-	case "JPG", "JPEG", "PNG", "GIF": // only allow for `image/jpeg,image/jpg,image/png, image/gif`
+	switch ext {
+	case "jpg", "jpeg", "png", "gif": // only allow for `image/jpeg,image/jpg,image/png, image/gif`
 		_, _, err = image.Decode(file)
-	case "ICO":
+	case "ico":
 		// TODO: There is currently no good Golang library to parse whether the image is in ico format.
 		return true
+	case "webp":
+		_, err = webp.Decode(file)
 	default:
 		return false
 	}
diff --git a/plugin/storage.go b/plugin/storage.go
index 0d046623..3edbe53b 100644
--- a/plugin/storage.go
+++ b/plugin/storage.go
@@ -14,12 +14,14 @@ var (
 			".jpg":  true,
 			".jpeg": true,
 			".png":  true,
+			".webp": true,
 		},
 		UserPost: {
 			".jpg":  true,
 			".jpeg": true,
 			".png":  true,
 			".gif":  true,
+			".webp": true,
 		},
 		AdminBranding: {
 			".jpg":  true,