diff --git a/src/components/ExportData.vue b/src/components/ExportData.vue
index 9198bfd13..057462a23 100644
--- a/src/components/ExportData.vue
+++ b/src/components/ExportData.vue
@@ -227,7 +227,8 @@ export default class ExportData extends Vue {
         content = content.replace(/<([0-9]*)>/g, '<oneConnection>').replace(/<(\/[0-9]*)>/g, '</oneConnection>')
         this.exportDiffFormatData(content, 'XML')
       } catch (err) {
-        this.$message.error(err.toString())
+        const error = err as Error
+        this.$message.error(error.toString())
       }
     }
     this.confirmLoading = true
@@ -256,7 +257,8 @@ export default class ExportData extends Vue {
         content = CSVConvert(JSON.parse(content)).replace(/"(\d+\.(\d+)?0)"/g, '="$1"')
         this.exportDiffFormatData(content, 'CSV')
       } catch (err) {
-        this.$message.error(err.toString())
+        const error = err as Error
+        this.$message.error(error.toString())
       }
     }
     this.confirmLoading = true
diff --git a/src/components/FullMsgDialog.vue b/src/components/FullMsgDialog.vue
new file mode 100644
index 000000000..b12eb968c
--- /dev/null
+++ b/src/components/FullMsgDialog.vue
@@ -0,0 +1,138 @@
+<template>
+  <my-dialog
+    :title="$t('common.viewData')"
+    :visible.sync="showDialog"
+    class="full-msg-dialog"
+    width="600px"
+    :confirmBtnText="$t('common.saveToLocal')"
+    @confirm="saveDataToLocal"
+    @close="resetData"
+  >
+    <el-skeleton class="loading-full-msg" v-if="loadingMsg" :rows="6" animated />
+    <template v-else>
+      <div class="full-msg-size">
+        <span>
+          {{ $t('connections.payloadSize') }}: <strong>{{ calculateAndFormatTextSize(fullMsg) }}</strong>
+        </span>
+        <span>
+          {{ $t('common.msgType') }}: <strong>{{ msgType }}</strong>
+        </span>
+      </div>
+      <div class="editor-container full-msg-editor">
+        <Editor
+          :key="msgId"
+          ref="fullMsgEditorRef"
+          id="full-msg-editor"
+          :lang="lang"
+          lineNumbers="on"
+          wordWrap="on"
+          v-model="fullMsg"
+          disabled
+        />
+      </div>
+    </template>
+  </my-dialog>
+</template>
+
+<script lang="ts">
+import { Component, Vue, Prop, Watch } from 'vue-property-decorator'
+import useServices from '@/database/useServices'
+import MyDialog from './MyDialog.vue'
+import Editor from './Editor.vue'
+import { ipcRenderer } from 'electron'
+import { calculateTextSize } from '@/utils/data'
+
+@Component({
+  components: {
+    MyDialog,
+    Editor,
+  },
+})
+export default class FullMsgDialog extends Vue {
+  @Prop({ default: false }) public visible!: boolean
+  @Prop({ required: true }) public msgId!: string
+  @Prop({ default: '' }) public msgType!: string
+
+  private showDialog: boolean = this.visible
+
+  @Watch('visible')
+  private onVisibleChanged(val: boolean) {
+    this.showDialog = val
+  }
+
+  private getFormatOrLang(type: string) {
+    if (['JSON', 'CBOR'].includes(this.msgType)) {
+      return type === 'lang' ? 'json' : 'json'
+    }
+    return type === 'lang' ? 'plaintext' : 'txt'
+  }
+
+  get lang() {
+    return this.getFormatOrLang('lang')
+  }
+
+  get format() {
+    return this.getFormatOrLang('format')
+  }
+
+  private fullMsg = ''
+  private filename = 'payload'
+  private loadingMsg = false
+
+  private async loadMsg() {
+    this.loadingMsg = true
+    const { messageService } = useServices()
+    const message = await messageService.getOne(this.msgId)
+    this.fullMsg = message?.payload || ''
+    this.loadingMsg = false
+  }
+
+  private async saveDataToLocal() {
+    ipcRenderer.send('exportData', this.filename, this.fullMsg, this.format)
+    ipcRenderer.on('saved', () => {
+      this.$message.success(`${this.filename}.${this.format} ${this.$t('common.saveSuccess')}`)
+      this.resetData()
+    })
+  }
+
+  private resetData() {
+    ipcRenderer.removeAllListeners('saved')
+    this.fullMsg = ''
+    this.showDialog = false
+    this.$emit('update:visible', false)
+  }
+
+  private calculateAndFormatTextSize(text: string, decimals = 2) {
+    return calculateTextSize(text)
+  }
+
+  private mounted() {
+    this.loadMsg()
+  }
+}
+</script>
+
+<style lang="scss">
+.full-msg-dialog {
+  .el-dialog__body {
+    padding-top: 24px;
+    padding-bottom: 0px;
+  }
+  .loading-full-msg {
+    height: 400px;
+  }
+  .full-msg-size {
+    color: var(--color-text-default);
+    margin-bottom: 12px;
+    display: flex;
+    gap: 12px;
+  }
+  .editor-container.full-msg-editor {
+    height: 400px;
+    background: var(--color-bg-normal);
+    border: 1px solid var(--color-border-default);
+    padding: 10px 1px 1px 1px;
+    border-radius: 4px;
+  }
+}
+</style>
diff --git a/src/components/MessageList.vue b/src/components/MessageList.vue
index 454066fc5..f6d52ecd1 100644
--- a/src/components/MessageList.vue
+++ b/src/components/MessageList.vue
@@ -7,7 +7,13 @@
     <span v-show="showBeforeLoadingIcon" class="loading-icon"><i class="el-icon-loading"></i></span>
     <div v-if="showMessages.length" class="scroller">
       <template v-for="item in showMessages">
-        <MsgLeftItem v-if="!item.out" :key="item.id" v-bind="item" @showmenu="handleShowContextMenu(arguments, item)" />
+        <MsgLeftItem
+          v-if="!item.out"
+          :key="item.id"
+          :msgId="item.id"
+          v-bind="item"
+          @showmenu="handleShowContextMenu(arguments, item)"
+        />
         <MsgRightItem v-else :key="item.id" v-bind="item" @showmenu="handleShowContextMenu(arguments, item)" />
       </template>
     </div>
diff --git a/src/components/MsgLeftItem.vue b/src/components/MsgLeftItem.vue
index 0a34482ad..cdc45fd10 100644
--- a/src/components/MsgLeftItem.vue
+++ b/src/components/MsgLeftItem.vue
@@ -65,22 +65,43 @@
           />
         </p>
       </div>
-      <pre v-if="!hightlight">{{ payload }}</pre>
-      <pre v-else><code class="language-js" >{{ payload }}</code></pre>
+      <template v-if="isLargeMsg">
+        <div class="large-message { .el-button { margin-top: 12px;}}">
+          <pre>{{ payload.substr(0, showMaxLen) }}<span><i class="iconfont icon-more"></i></span></pre>
+          <el-tooltip
+            placement="bottom"
+            :effect="theme !== 'light' ? 'light' : 'dark'"
+            :open-delay="500"
+            :content="$t('connections.messageTooLargeToHide')"
+          >
+            <el-button type="info" plain size="mini" class="see-more-btn" @click="handleShowFullMsg()">{{
+              $t('common.seeMore')
+            }}</el-button>
+          </el-tooltip>
+        </div>
+      </template>
+      <template v-else>
+        <pre v-if="!hightlight">{{ payload }}</pre>
+        <pre v-else><code class="language-js" >{{ payload }}</code></pre>
+      </template>
     </div>
     <p class="left-time time">{{ createAt }}</p>
+    <FullMsgDialog v-if="showFullMsg" :visible.sync="showFullMsg" :msgId="msgId" :msgType="msgType" />
   </div>
 </template>
 
 <script lang="ts">
 import { Component, Vue, Prop } from 'vue-property-decorator'
 import KeyValueEditor from './KeyValueEditor.vue'
+import FullMsgDialog from './FullMsgDialog.vue'
 import Prism from 'prismjs'
 import { Getter } from 'vuex-class'
+import { SHOW_MAX_LENGTH } from '@/utils/data'
 
 @Component({
   components: {
     KeyValueEditor,
+    FullMsgDialog,
   },
 })
 export default class MsgLeftItem extends Vue {
@@ -88,15 +109,19 @@ export default class MsgLeftItem extends Vue {
   @Prop({ required: true }) public qos!: number
   @Prop({ required: true }) public payload!: string
   @Prop({ required: true }) public createAt!: string
+  @Prop({ required: true }) public msgId!: string
   @Prop({ required: false }) public meta?: string
   @Prop({ required: false, default: false }) public retain!: boolean
   @Prop({ required: false, default: () => ({}) }) public properties!: PushPropertiesModel
   @Prop({ required: false, default: '' }) public color!: string
 
   @Getter('jsonHighlight') private jsonHighlight!: boolean
+  @Getter('currentTheme') private theme!: Theme
 
   public hightlight: boolean = false
 
+  private showFullMsg: boolean = false
+
   public customMenu(event: MouseEvent) {
     this.$emit('showmenu', this.payload, event)
   }
@@ -128,6 +153,14 @@ export default class MsgLeftItem extends Vue {
     return this.meta ? JSON.parse(this.meta).msgError : null
   }
 
+  get isLargeMsg() {
+    return this.meta ? JSON.parse(this.meta).isLargeData : false
+  }
+
+  get showMaxLen() {
+    return SHOW_MAX_LENGTH
+  }
+
   private hightlightJSON() {
     if (this.jsonHighlight === false) {
       return
@@ -144,6 +177,10 @@ export default class MsgLeftItem extends Vue {
     }
   }
 
+  private handleShowFullMsg() {
+    this.showFullMsg = true
+  }
+
   private mounted() {
     this.hightlightJSON()
   }
@@ -193,5 +230,17 @@ body.night {
       border: 1px solid var(--color-border-left_metainfo) !important;
     }
   }
+  .large-message {
+    .el-button.see-more-btn {
+      margin-top: 6px;
+      background: transparent;
+      color: var(--color-text-left_info);
+      border: 1px solid var(--color-text-left_info);
+      &:hover {
+        background: transparent;
+        color: var(--color-text-default);
+      }
+    }
+  }
 }
 </style>
diff --git a/src/components/MyDialog.vue b/src/components/MyDialog.vue
index c1b42f028..1d37cf773 100644
--- a/src/components/MyDialog.vue
+++ b/src/components/MyDialog.vue
@@ -18,7 +18,7 @@
         :loading="confirmLoading"
         :disabled="btnDisabled"
         @click="confirmClick"
-        >{{ $t('common.confirm') }}
+        >{{ confirmBtnText === '' ? $t('common.confirm') : confirmBtnText }}
       </el-button>
     </div>
   </el-dialog>
@@ -37,6 +37,8 @@ export default class MyDialog extends Vue {
   @Prop({ default: false }) public visible!: boolean
   // Confirm button loading
   @Prop({ default: false }) public confirmLoading!: boolean
+  // Dialog confirm button text
+  @Prop({ default: '' }) public confirmBtnText!: string
   // Confirm button disabled status
   @Prop({ default: false }) public btnDisabled!: boolean
   // Dialog margin-top value
diff --git a/src/database/services/MessageService.ts b/src/database/services/MessageService.ts
index f284c8c8f..93c77fab6 100644
--- a/src/database/services/MessageService.ts
+++ b/src/database/services/MessageService.ts
@@ -190,4 +190,9 @@ export default class MessageService {
   public async cleanAll(): Promise<void> {
     await this.messageRepository.clear()
   }
+
+  public async getOne(id: string): Promise<MessageModel | undefined> {
+    const res = await this.messageRepository.findOne(id)
+    return res ? MessageService.entityToModel(res) : undefined
+  }
 }
diff --git a/src/lang/common.ts b/src/lang/common.ts
index 82f0b0e06..96dac701a 100644
--- a/src/lang/common.ts
+++ b/src/lang/common.ts
@@ -594,4 +594,32 @@ export default {
     ja: 'Webアプリ',
     hu: 'Web alkalmazások',
   },
+  seeMore: {
+    zh: '查看更多',
+    en: 'See More',
+    tr: 'Daha Fazla',
+    ja: 'もっと見る',
+    hu: 'Továbbiak',
+  },
+  viewData: {
+    zh: '查看数据',
+    en: 'View Data',
+    tr: 'Veriyi Görüntüle',
+    ja: 'データを表示',
+    hu: 'Adatok meg',
+  },
+  saveToLocal: {
+    zh: '保存到本地',
+    en: 'Save to Local',
+    tr: 'Yerel olarak kaydet',
+    ja: 'ローカルに保存',
+    hu: 'Mentés helyi',
+  },
+  msgType: {
+    zh: '消息类型',
+    en: 'Message Type',
+    tr: 'Mesaj Türü',
+    ja: 'メッセージタイプ',
+    hu: 'Üzenet típus',
+  },
 }
diff --git a/src/lang/connections.ts b/src/lang/connections.ts
index 95ec514ed..29dafc463 100644
--- a/src/lang/connections.ts
+++ b/src/lang/connections.ts
@@ -894,4 +894,25 @@ export default {
     ja: '接続リストを表示',
     hu: 'Kapcsolatok mutatása',
   },
+  messageTooLargeToHide: {
+    zh: '消息内容过大，已隐藏，点击查看完整内容',
+    en: 'Message content is too large, hidden, click to view full content',
+    tr: 'Mesaj içeriği çok büyük, gizlendi, tam içeriği görüntülemek için tıklayın',
+    ja: 'メッセージ内容が大きすぎて非表示になりました。クリックして完全な内容を表示します',
+    hu: 'Az üzenet tartalma túl nagy, elrejtve, kattintson a teljes tartalom megtekintéséhez',
+  },
+  showFullMsg: {
+    zh: '显示完整消息',
+    en: 'Show Full Message',
+    tr: 'Tam Mesajı Göster',
+    ja: '完全なメッセージを表示',
+    hu: 'Teljes üzenet megjelenítése',
+  },
+  payloadSize: {
+    zh: '消息大小',
+    en: 'Payload Size',
+    tr: 'Yük Boyutu',
+    ja: 'ペイロードサイズ',
+    hu: 'A hasznos teher mérete',
+  },
 }
diff --git a/src/utils/data.ts b/src/utils/data.ts
new file mode 100644
index 000000000..ed5a8c684
--- /dev/null
+++ b/src/utils/data.ts
@@ -0,0 +1,24 @@
+export const LARGE_DATA_THRESHOLD = 524288 // 512KB
+
+export const SHOW_MAX_LENGTH = 100
+
+export function isLargeData(message: string): boolean {
+  return message.length > LARGE_DATA_THRESHOLD
+}
+
+export function calculateTextSize(text: string, decimals = 2) {
+  const blob = new Blob([text], { type: 'text/plain' })
+  const bytes = blob.size
+
+  if (bytes === 0) return '0 Bytes'
+
+  const k = 1024
+  const dm = decimals < 0 ? 0 : decimals
+  const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']
+
+  const i = Math.floor(Math.log(bytes) / Math.log(k))
+
+  return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i]
+}
+
+export default {}
diff --git a/src/views/connections/ConnectionsDetail.vue b/src/views/connections/ConnectionsDetail.vue
index da5cf85a3..af4c1b0d0 100644
--- a/src/views/connections/ConnectionsDetail.vue
+++ b/src/views/connections/ConnectionsDetail.vue
@@ -349,6 +349,7 @@ import { deserializeBufferToProtobuf, printObjectAsString, serializeProtobufToBu
 import { jsonStringify } from '@/utils/jsonUtils'
 import { LeftValues, BodyTopValues, MsgTopValues, DetailLeftValues } from '@/utils/styles'
 import getErrorReason from '@/utils/mqttErrorReason'
+import { isLargeData } from '@/utils/data'
 
 type CommandType =
   | 'searchContent'
@@ -586,6 +587,12 @@ export default class ConnectionsDetail extends Vue {
     message.meta = JSON.stringify(metaObj)
   }
 
+  private updateMetaBigData(message: MessageModel) {
+    const metaObj = JSON.parse(message.meta || '{}')
+    metaObj['isLargeData'] = true
+    message.meta = JSON.stringify(metaObj)
+  }
+
   // Connect
   public async connect(): Promise<boolean | void> {
     if (this.client.connected || this.connectLoading) {
@@ -1267,6 +1274,9 @@ export default class ConnectionsDetail extends Vue {
     if (['JSON', 'CBOR'].includes(this.receivedMsgType) && jsonMsgError) {
       this.updateMetaError(receivedMessage, jsonMsgError)
     }
+    if (isLargeData(receivedMessage.payload)) {
+      this.updateMetaBigData(receivedMessage)
+    }
 
     return receivedMessage
   }
diff --git a/tsconfig.json b/tsconfig.json
index 4e20425e9..14e815463 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -48,4 +48,4 @@
   "exclude": [
     "node_modules"
   ]
-}
+}
\ No newline at end of file