diff --git a/ROADMAP.md b/ROADMAP.md
index 15ac347..33cf621 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -30,7 +30,7 @@
 - [x] **自动格式检测** — 检查内容 magic bytes 自动选择查看器
 - [x] **自定义格式化器** — 外部可执行文件 + 模板参数 {KEY} {VALUE} {HEX} {HEX_FILE}
 - [x] **ReJson / TairJson 支持** — JSON.GET / JSON.SET / JSON.DEL 编辑
-- [ ] **二进制 key 支持** — [Hex] 前缀输入，hex ↔ buffer 双向转换
+- [x] **二进制 key 支持** — [Hex] 前缀输入，hex ↔ buffer 双向转换
 - [x] **虚拟化滚动** — 大 key 集合（200k+）的性能优化，KeyList 树形视图虚拟化
 - [x] **批量删除预览** — 先扫描预览，再确认删除，显示 key 数量和总大小
 - [x] **Key 导出** — DUMP + PTTL → CSV 下载
diff --git a/src/components/KeyDetail.vue b/src/components/KeyDetail.vue
index d1d1f77..4043b6c 100644
--- a/src/components/KeyDetail.vue
+++ b/src/components/KeyDetail.vue
@@ -4,6 +4,7 @@ import { computed, ref } from 'vue'
 import { useKeyStore } from '@renderer/stores/key'
 import { useConnectionStore } from '@renderer/stores/connection'
 import { useI18n } from '@renderer/i18n'
+import { formatKeyName, isBinaryKey } from '@renderer/utils/binary'
 import { ElMessage, ElMessageBox } from 'element-plus'
 import StringEditor from './StringEditor.vue'
 import HashEditor from './HashEditor.vue'
@@ -100,6 +101,17 @@ async function copyKeyName() {
   }
 }
 
+async function copyHexKeyName() {
+  if (!keyStore.selectedKey) return
+  try {
+    const hex = Array.from(keyStore.selectedKey).map(c => c.charCodeAt(0).toString(16).padStart(2, '0')).join('')
+    await navigator.clipboard.writeText(hex)
+    ElMessage.success(t('key.copied'))
+  } catch {
+    ElMessage.error('Copy failed')
+  }
+}
+
 async function deleteKey() {
   if (!connStore.activeId || !keyStore.selectedKey) return
   try {
@@ -124,10 +136,20 @@ async function refreshKey() {
     <div class="detail-header">
       <div class="key-info">
         <el-icon class="key-icon" :style="{ color: typeColor }"><Document /></el-icon>
-        <span class="key-name">{{ keyStore.selectedKey }}</span>
+        <span class="key-name">{{ formatKeyName(keyStore.selectedKey) }}</span>
         <el-button size="small" text class="copy-btn" @click="copyKeyName">
           <el-icon><CopyDocument /></el-icon>
         </el-button>
+        <el-button
+          v-if="isBinaryKey(keyStore.selectedKey)"
+          size="small"
+          text
+          class="copy-btn"
+          @click="copyHexKeyName"
+        >
+          <el-icon><CopyDocument /></el-icon>
+          <span class="copy-hex-label">{{ t('key.copyHex') }}</span>
+        </el-button>
         <span class="type-badge" :style="{ color: typeColor, borderColor: typeColor }">
           {{ keyStore.selectedType?.toUpperCase() }}
         </span>
diff --git a/src/components/KeyList.vue b/src/components/KeyList.vue
index 3c1d4f1..93fec4a 100644
--- a/src/components/KeyList.vue
+++ b/src/components/KeyList.vue
@@ -5,6 +5,7 @@ import { useVirtualizer } from '@tanstack/vue-virtual'
 import { useKeyStore } from '@renderer/stores/key'
 import { useConnectionStore } from '@renderer/stores/connection'
 import { useI18n } from '@renderer/i18n'
+import { formatKeyName } from '@renderer/utils/binary'
 import { ElMessage, ElMessageBox } from 'element-plus'
 
 const keyStore = useKeyStore()
@@ -218,7 +219,7 @@ async function batchDelete() {
   const previewKeys = keysArray.slice(0, 100)
   const remaining = count - 100
 
-  const keyListHtml = previewKeys.map(k => `<div class="batch-preview-key">${escapeHtml(k)}</div>`).join('')
+  const keyListHtml = previewKeys.map(k => `<div class="batch-preview-key">${escapeHtml(formatKeyName(k))}</div>`).join('')
   const hintText = t('key.batchPreviewHint', { n: count })
   const andMore = remaining > 0 ? `<div class="batch-preview-more">${t('key.andMore', { n: remaining })}</div>` : ''
 
@@ -475,7 +476,7 @@ defineExpose({ deselectAll })
                   @click.stop
                 />
                 <el-icon class="key-icon"><Document /></el-icon>
-                <span class="key-name">{{ filteredKeys[vItem.index] }}</span>
+                <span class="key-name">{{ formatKeyName(filteredKeys[vItem.index]) }}</span>
               </div>
             </div>
           </div>
@@ -500,7 +501,7 @@ defineExpose({ deselectAll })
               @click.stop
             />
             <el-icon class="key-icon"><Document /></el-icon>
-            <span class="key-name">{{ keyName }}</span>
+            <span class="key-name">{{ formatKeyName(keyName) }}</span>
           </div>
         </template>
       </div>
@@ -518,14 +519,14 @@ defineExpose({ deselectAll })
               <ArrowRight />
             </el-icon>
             <el-icon class="tree-icon folder-icon"><Folder /></el-icon>
-            <span class="tree-name">{{ node.name }}</span>
+            <span class="tree-name">{{ formatKeyName(node.name) }}</span>
             <span class="tree-count">{{ node.count }}</span>
           </div>
           <div v-else class="tree-children" :class="{ hidden: !isFolderExpanded(node.fullPath) }">
             <div class="tree-item leaf-item" @click="selectKey(node.fullPath)">
               <span class="tree-spacer"></span>
               <el-icon class="tree-icon"><Document /></el-icon>
-              <span class="tree-name">{{ node.name }}</span>
+              <span class="tree-name">{{ formatKeyName(node.name) }}</span>
             </div>
           </div>
         </template>
diff --git a/src/i18n/locales/en.ts b/src/i18n/locales/en.ts
index 5f5e729..27be39a 100644
--- a/src/i18n/locales/en.ts
+++ b/src/i18n/locales/en.ts
@@ -110,6 +110,8 @@ export default {
     exportDone: 'Exported {n} keys',
     importDone: 'Imported {n} keys',
     importFailed: 'Import failed: {error}',
+    binaryKey: 'Binary Key',
+    copyHex: 'Copy Hex',
   },
   types: {
     string: 'STRING',
diff --git a/src/i18n/locales/zh-CN.ts b/src/i18n/locales/zh-CN.ts
index 0488313..d10d3d3 100644
--- a/src/i18n/locales/zh-CN.ts
+++ b/src/i18n/locales/zh-CN.ts
@@ -110,6 +110,8 @@ export default {
     exportDone: '已导出 {n} 个键',
     importDone: '已导入 {n} 个键',
     importFailed: '导入失败: {error}',
+    binaryKey: '二进制键',
+    copyHex: '复制 Hex',
   },
   types: {
     string: '字符串',
diff --git a/src/utils/binary.ts b/src/utils/binary.ts
new file mode 100644
index 0000000..64fd5f2
--- /dev/null
+++ b/src/utils/binary.ts
@@ -0,0 +1,17 @@
+// src/utils/binary.ts
+export function isBinaryKey(key: string): boolean {
+  // Check for non-printable characters (outside 0x20-0x7E, not standard whitespace)
+  for (let i = 0; i < key.length; i++) {
+    const code = key.charCodeAt(i)
+    if (code < 0x20 && code !== 0x09 && code !== 0x0a && code !== 0x0d) return true
+    if (code > 0x7e) return true
+  }
+  return false
+}
+
+export function formatKeyName(key: string): string {
+  if (isBinaryKey(key)) {
+    return '[Hex] ' + Array.from(key).map(c => c.charCodeAt(0).toString(16).padStart(2, '0')).join('')
+  }
+  return key
+}