diff --git a/src/main/java/org/fontory/fontorybe/font/controller/FontController.java b/src/main/java/org/fontory/fontorybe/font/controller/FontController.java
index e99fe3c..7a09e43 100644
--- a/src/main/java/org/fontory/fontorybe/font/controller/FontController.java
+++ b/src/main/java/org/fontory/fontorybe/font/controller/FontController.java
@@ -30,7 +30,6 @@
 import org.fontory.fontorybe.font.controller.port.FontService;
 import org.fontory.fontorybe.font.domain.Font;
 import org.springframework.data.domain.Page;
-import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
@@ -124,7 +123,7 @@ public ResponseEntity<?> getFontProgress(@Login UserPrincipal userPrincipal) {
     @Parameter(name = "fontId", description = "수정할 폰트 ID")
     @PutMapping("/{fontId}")
     public ResponseEntity<?> updateFont(
-            @RequestBody FontUpdateDTO fontUpdateDTO,
+            @RequestBody @Valid FontUpdateDTO fontUpdateDTO,
             @PathVariable Long fontId,
             @Login UserPrincipal userPrincipal
     ) {
@@ -260,7 +259,7 @@ public ResponseEntity<?> getPopularFonts(@Login(required = false) UserPrincipal
     @Parameter(name = "fontId", description = "수정할 폰트 ID")
     @PatchMapping("/progress/{fontId}")
     public ResponseEntity<?> updateFontProgress(
-            @RequestBody FontProgressUpdateDTO fontProgressUpdateDTO,
+            @RequestBody @Valid FontProgressUpdateDTO fontProgressUpdateDTO,
             @PathVariable Long fontId
     ) {
         log.info("Request received: Update font progress ID: {}, request: {}",
diff --git a/src/main/java/org/fontory/fontorybe/font/controller/dto/FontCreateDTO.java b/src/main/java/org/fontory/fontorybe/font/controller/dto/FontCreateDTO.java
index 01a1a91..2cc153d 100644
--- a/src/main/java/org/fontory/fontorybe/font/controller/dto/FontCreateDTO.java
+++ b/src/main/java/org/fontory/fontorybe/font/controller/dto/FontCreateDTO.java
@@ -2,6 +2,7 @@
 
 import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.Pattern;
+import jakarta.validation.constraints.Size;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Getter;
@@ -12,9 +13,11 @@
 public class FontCreateDTO {
 
     @NotBlank(message = "폰트 이름은 필수 입력 값입니다.")
+    @Size(min = 2, max = 30, message = "폰트 이름은 2자 이상 30자 이하로 입력해주세요.")
     private String name;
 
     @NotBlank(message = "폰트 예시는 필수 입력 값입니다.")
+    @Size(min = 10, max = 255, message = "폰트 예시는 10자 이상 255자 이하로 입력해주세요.")
     private String example;
 
     @Pattern(regexp = "^$|^01[016-9]\\d{7,8}$", message = "휴대폰 번호 형식이 올바르지 않습니다.")
diff --git a/src/main/java/org/fontory/fontorybe/font/controller/dto/FontProgressUpdateDTO.java b/src/main/java/org/fontory/fontorybe/font/controller/dto/FontProgressUpdateDTO.java
index 2a26840..dbd43e5 100644
--- a/src/main/java/org/fontory/fontorybe/font/controller/dto/FontProgressUpdateDTO.java
+++ b/src/main/java/org/fontory/fontorybe/font/controller/dto/FontProgressUpdateDTO.java
@@ -1,6 +1,7 @@
 package org.fontory.fontorybe.font.controller.dto;
 
 import io.swagger.v3.oas.annotations.media.Schema;
+import jakarta.validation.constraints.NotNull;
 import lombok.Builder;
 import lombok.Getter;
 import org.fontory.fontorybe.font.infrastructure.entity.FontStatus;
@@ -8,6 +9,7 @@
 @Getter
 @Builder
 public class FontProgressUpdateDTO {
-    @Schema(description = "폰트의 상태 (PROGRESS, DONE)")
+    @NotNull(message = "폰트 상태는 필수입니다.")
+    @Schema(description = "폰트의 상태 (PROGRESS, DONE, FAILED)")
     private FontStatus status;
 }
diff --git a/src/main/java/org/fontory/fontorybe/font/controller/dto/FontUpdateDTO.java b/src/main/java/org/fontory/fontorybe/font/controller/dto/FontUpdateDTO.java
index 3e01b08..81a373e 100644
--- a/src/main/java/org/fontory/fontorybe/font/controller/dto/FontUpdateDTO.java
+++ b/src/main/java/org/fontory/fontorybe/font/controller/dto/FontUpdateDTO.java
@@ -1,11 +1,18 @@
 package org.fontory.fontorybe.font.controller.dto;
 
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.Size;
 import lombok.Builder;
 import lombok.Getter;
 
 @Getter
 @Builder
 public class FontUpdateDTO {
+    @NotBlank(message = "폰트 이름은 필수 입력 값입니다.")
+    @Size(min = 2, max = 30, message = "폰트 이름은 2자 이상 30자 이하로 입력해주세요.")
     private String name;
+
+    @NotBlank(message = "폰트 예시는 필수 입력 값입니다.")
+    @Size(min = 10, max = 255, message = "폰트 예시는 10자 이상 255자 이하로 입력해주세요.")
     private String example;
 }
diff --git a/src/main/java/org/fontory/fontorybe/member/controller/ProfileController.java b/src/main/java/org/fontory/fontorybe/member/controller/ProfileController.java
index b651cee..ab095e6 100644
--- a/src/main/java/org/fontory/fontorybe/member/controller/ProfileController.java
+++ b/src/main/java/org/fontory/fontorybe/member/controller/ProfileController.java
@@ -3,6 +3,7 @@
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import jakarta.servlet.http.HttpServletResponse;
+import jakarta.validation.Valid;
 import lombok.Builder;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -71,7 +72,7 @@ public ResponseEntity<MyProfileResponse> getMyProfile(
     @PatchMapping(consumes = MULTIPART_FORM_DATA_VALUE)
     public ResponseEntity<MyProfileResponse> updateMember(
             @Login UserPrincipal userPrincipal,
-            @RequestPart MemberUpdateRequest req,
+            @RequestPart @Valid MemberUpdateRequest req,
             @SingleFileUpload @RequestPart("file") List<MultipartFile> files
     ) {
         Long requestMemberId = userPrincipal.getId();
diff --git a/src/main/java/org/fontory/fontorybe/member/controller/RegistrationController.java b/src/main/java/org/fontory/fontorybe/member/controller/RegistrationController.java
index 3d054b2..7fa1c17 100644
--- a/src/main/java/org/fontory/fontorybe/member/controller/RegistrationController.java
+++ b/src/main/java/org/fontory/fontorybe/member/controller/RegistrationController.java
@@ -2,6 +2,7 @@
 
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.validation.Valid;
 import lombok.Builder;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -58,7 +59,7 @@ public ResponseEntity<Boolean> checkDuplicate(
     @PostMapping(consumes = MULTIPART_FORM_DATA_VALUE)
     public ResponseEntity<MemberCreateResponse> register(
             @Login UserPrincipal user,
-            @RequestPart InitMemberInfoRequest req,
+            @RequestPart @Valid InitMemberInfoRequest req,
             @SingleFileUpload @RequestPart("file") List<MultipartFile> files
     ) {
         Long requestMemberId = user.getId();
diff --git a/src/main/java/org/fontory/fontorybe/member/controller/dto/InitMemberInfoRequest.java b/src/main/java/org/fontory/fontorybe/member/controller/dto/InitMemberInfoRequest.java
index 3bb9513..ff9e248 100644
--- a/src/main/java/org/fontory/fontorybe/member/controller/dto/InitMemberInfoRequest.java
+++ b/src/main/java/org/fontory/fontorybe/member/controller/dto/InitMemberInfoRequest.java
@@ -1,5 +1,9 @@
 package org.fontory.fontorybe.member.controller.dto;
 
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Past;
+import jakarta.validation.constraints.Size;
 import java.time.LocalDate;
 
 import lombok.AllArgsConstructor;
@@ -13,8 +17,17 @@
 @ToString
 @AllArgsConstructor
 public class InitMemberInfoRequest {
+    @NotBlank(message = "닉네임은 필수 입력 값입니다.")
+    @Size(min = 2, max = 20, message = "닉네임은 2자 이상 20자 이하로 입력해주세요.")
     private String nickname;
+
+    @NotNull(message = "성별을 선택해주세요.")
     private Gender gender;
+
+    @NotNull(message = "생년월일을 입력해주세요.")
+    @Past(message = "생년월일은 과거 날짜만 가능합니다.")
     private LocalDate birth;
+
+    @NotNull(message = "이용약관 동의 여부를 선택해주세요.")
     private Boolean terms;
 }
diff --git a/src/main/java/org/fontory/fontorybe/member/controller/dto/MemberUpdateRequest.java b/src/main/java/org/fontory/fontorybe/member/controller/dto/MemberUpdateRequest.java
index 63179cd..b658a46 100644
--- a/src/main/java/org/fontory/fontorybe/member/controller/dto/MemberUpdateRequest.java
+++ b/src/main/java/org/fontory/fontorybe/member/controller/dto/MemberUpdateRequest.java
@@ -1,5 +1,8 @@
 package org.fontory.fontorybe.member.controller.dto;
 
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Size;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
 import lombok.Getter;
@@ -10,6 +13,10 @@
 @ToString
 @AllArgsConstructor
 public class MemberUpdateRequest {
+    @NotBlank(message = "닉네임은 필수 입력 값입니다.")
+    @Size(min = 2, max = 20, message = "닉네임은 2자 이상 20자 이하로 입력해주세요.")
     private String nickname;
+
+    @NotNull(message = "이용약관 동의 여부를 선택해주세요.")
     private Boolean terms;
 }