diff --git a/system1-factory/fastapi-bridge/static/js/auth.js b/system1-factory/fastapi-bridge/static/js/auth.js
index b6881fb..b33cfc3 100644
--- a/system1-factory/fastapi-bridge/static/js/auth.js
+++ b/system1-factory/fastapi-bridge/static/js/auth.js
@@ -7,8 +7,9 @@
  */
 export function parseJwt(token) {
   try {
-    // 토큰의 두 번째 부분(payload)을 base64 디코딩하고 JSON으로 파싱
-    return JSON.parse(atob(token.split('.')[1]));
+    // 토큰의 두 번째 부분(payload)을 base64 디코딩하고 JSON으로 파싱 (UTF-8 한글 지원)
+    const b = atob(token.split('.')[1].replace(/-/g,'+').replace(/_/g,'/'));
+    return JSON.parse(new TextDecoder().decode(Uint8Array.from(b, c => c.charCodeAt(0))));
   } catch (e) {
     console.error("잘못된 토큰입니다.", e);
     return null;
diff --git a/system1-factory/web/js/api-config.js b/system1-factory/web/js/api-config.js
index 7f0675a..ff256da 100644
--- a/system1-factory/web/js/api-config.js
+++ b/system1-factory/web/js/api-config.js
@@ -56,7 +56,8 @@ function ensureAuthenticated() {
 // 토큰 만료 확인 함수
 function isTokenExpired(token) {
   try {
-    const payload = JSON.parse(atob(token.split('.')[1]));
+    const b = atob(token.split('.')[1].replace(/-/g,'+').replace(/_/g,'/'));
+    const payload = JSON.parse(new TextDecoder().decode(Uint8Array.from(b, c => c.charCodeAt(0))));
     const currentTime = Math.floor(Date.now() / 1000);
     return payload.exp < currentTime;
   } catch (error) {
diff --git a/system1-factory/web/js/auth.js b/system1-factory/web/js/auth.js
index e6d3a3e..1890f7d 100644
--- a/system1-factory/web/js/auth.js
+++ b/system1-factory/web/js/auth.js
@@ -7,7 +7,8 @@
  */
 export function parseJwt(token) {
   try {
-    return JSON.parse(atob(token.split('.')[1]));
+    const b = atob(token.split('.')[1].replace(/-/g,'+').replace(/_/g,'/'));
+    return JSON.parse(new TextDecoder().decode(Uint8Array.from(b, c => c.charCodeAt(0))));
   } catch (e) {
     console.error("잘못된 토큰입니다.", e);
     return null;
diff --git a/tkpurchase/web/nginx.conf b/tkpurchase/web/nginx.conf
index 7eea643..4e2c51c 100644
--- a/tkpurchase/web/nginx.conf
+++ b/tkpurchase/web/nginx.conf
@@ -1,6 +1,7 @@
 server {
     listen 80;
     server_name _;
+    charset utf-8;
 
     root /usr/share/nginx/html;
     index index.html;
diff --git a/tkpurchase/web/static/js/tkpurchase-core.js b/tkpurchase/web/static/js/tkpurchase-core.js
index f81bcdb..138e34d 100644
--- a/tkpurchase/web/static/js/tkpurchase-core.js
+++ b/tkpurchase/web/static/js/tkpurchase-core.js
@@ -22,7 +22,7 @@ function getLoginUrl() {
     if (h.includes('technicalkorea.net')) return location.protocol + '//tkfb.technicalkorea.net/login?redirect=' + encodeURIComponent(location.href) + '&_t=' + t;
     return location.protocol + '//' + h + ':30000/login?redirect=' + encodeURIComponent(location.href) + '&_t=' + t;
 }
-function decodeToken(t) { try { return JSON.parse(atob(t.split('.')[1].replace(/-/g,'+').replace(/_/g,'/'))); } catch { return null; } }
+function decodeToken(t) { try { const b = atob(t.split('.')[1].replace(/-/g,'+').replace(/_/g,'/')); return JSON.parse(new TextDecoder().decode(Uint8Array.from(b, c => c.charCodeAt(0)))); } catch { return null; } }
 
 /* ===== 리다이렉트 루프 방지 ===== */
 const _REDIRECT_KEY = '_sso_redirect_ts';
diff --git a/user-management/web/nginx.conf b/user-management/web/nginx.conf
index 65a880f..bb5ff2f 100644
--- a/user-management/web/nginx.conf
+++ b/user-management/web/nginx.conf
@@ -1,6 +1,7 @@
 server {
     listen 80;
     server_name _;
+    charset utf-8;
 
     root /usr/share/nginx/html;
     index index.html;
diff --git a/user-management/web/static/js/tkuser-core.js b/user-management/web/static/js/tkuser-core.js
index d70f922..473a023 100644
--- a/user-management/web/static/js/tkuser-core.js
+++ b/user-management/web/static/js/tkuser-core.js
@@ -17,7 +17,7 @@ function getLoginUrl() {
     if (h.includes('technicalkorea.net')) return location.protocol + '//tkfb.technicalkorea.net/login?redirect=' + encodeURIComponent(location.href) + '&_t=' + t;
     return location.protocol + '//' + h + ':30000/login?redirect=' + encodeURIComponent(location.href) + '&_t=' + t;
 }
-function decodeToken(t) { try { return JSON.parse(atob(t.split('.')[1].replace(/-/g,'+').replace(/_/g,'/'))); } catch { return null; } }
+function decodeToken(t) { try { const b = atob(t.split('.')[1].replace(/-/g,'+').replace(/_/g,'/')); return JSON.parse(new TextDecoder().decode(Uint8Array.from(b, c => c.charCodeAt(0)))); } catch { return null; } }
 
 /* ===== 리다이렉트 루프 방지 ===== */
 const _REDIRECT_KEY = '_sso_redirect_ts';