diff --git a/chatlab.md b/chatlab.md
new file mode 100644
index 00000000..580aceae
--- /dev/null
+++ b/chatlab.md
@@ -0,0 +1,326 @@
+# ChatLab 标准化格式规范 v0.0.1
+
+ChatLab 定义了一套标准的聊天记录数据交换格式，用于支持多平台数据的统一导入和分析。
+只要你将聊天记录转为该格式，那么就可以被 ChatLab 解析并使用其分析能力。
+
+> **注意**
+> 该格式规范目前仍处于早期制定阶段，部分字段和结构可能会在后续版本中调整。
+
+## 概述
+
+### 支持的文件格式
+
+| 格式 | 扩展名 | 适用场景 |
+| --- | --- | --- |
+| **JSON** | `.json` | 中小型记录（<100 万条），结构清晰，易于阅读 |
+| **JSONL** | `.jsonl` | 超大规模记录（>100 万条），流式处理，内存占用恒定 |
+
+### 格式对比
+
+| 特性 | JSON | JSONL |
+| --- | --- | --- |
+| **内存占用** | 需加载完整结构 | 逐行处理，恒定(~100MB) |
+| **文件大小限制** | ~1GB（取决于内存） | 无实际限制 |
+| **追加写入** | - 需重写整个文件 | ✅ 直接追加行 |
+| **错误恢复** | 单处错误整文件失效 | 可跳过错误行继续 |
+| **可读性** | ⭐⭐⭐ 易于阅读 | ⭐⭐ 每行一条记录 |
+| **推荐场景** | 小中型记录(<100 万条) | 大型记录(>100 万条) |
+
+---
+
+## 快速说明
+
+以下是一个最小化的 ChatLab 格式示例，只包含必要字段：
+
+```json
+{
+  "chatlab": {
+    "version": "0.0.1",
+    "exportedAt": 1703001600
+  },
+  "meta": {
+    "name": "我的群聊",
+    "platform": "qq",
+    "type": "group"
+  },
+  "members": [
+    {
+      "platformId": "123456",
+      "accountName": "张三"
+    }
+  ],
+  "messages": [
+    {
+      "sender": "123456",
+      "accountName": "张三",
+      "timestamp": 1703001600,
+      "type": 0,
+      "content": "大家好！"
+    }
+  ]
+}
+
+```
+
+---
+
+## JSON 格式详细说明
+
+### 文件头 (chatlab)
+
+| 字段 | 类型 | 必填 | 说明 |
+| --- | --- | --- | --- |
+| `version` | string | ✅ | 格式版本号，当前为 "0.0.1" |
+| `exportedAt` | number | ✅ | 导出时间（秒级 Unix 时间戳） |
+| `generator` | string | - | 生成工具名称 |
+| `description` | string | - | 描述信息 |
+
+### 元信息 (meta)
+
+| 字段 | 类型 | 必填 | 说明 |
+| --- | --- | --- | --- |
+| `name` | string | ✅ | 群名或对话名 |
+| `platform` | string | ✅ | 平台标识，如 `qq` / `wechat` / `discord` / `whatsapp` 等 |
+| `type` | string | ✅ | 聊天类型：`group`（群聊）/ `private`（私聊） |
+| `groupId` | string | - | 群ID（仅群聊） |
+| `groupAvatar` | string | - | 群头像（Data URL 格式） |
+| `sources` | MergeSource[] | - | 合并来源（合并工具生成，见下方说明） |
+
+#### MergeSource 结构（合并来源）
+
+当使用合并工具合并多个聊天记录文件时，`sources` 字段会记录原始文件的来源信息：
+
+| 字段 | 类型 | 必填 | 说明 |
+| --- | --- | --- | --- |
+| `filename` | string | ✅ | 原文件名 |
+| `platform` | string | - | 原平台 |
+| `messageCount` | number | ✅ | 消息数量 |
+
+### 成员 (members)
+
+| 字段 | 类型 | 必填 | 说明 |
+| --- | --- | --- | --- |
+| `platformId` | string | ✅ | 用户唯一标识 |
+| `accountName` | string | ✅ | 账号名称 |
+| `groupNickname` | string | - | 群昵称（仅群聊） |
+| `aliases` | string[] | - | 用户自定义别名 |
+| `avatar` | string | - | 用户头像（Data URL 格式） |
+
+### 消息 (messages)
+
+| 字段 | 类型 | 必填 | 说明 |
+| --- | --- | --- | --- |
+| `sender` | string | ✅ | 发送者的 `platformId` |
+| `accountName` | string | ✅ | 发送时的账号名称 |
+| `groupNickname` | string | - | 发送时的群昵称 |
+| `timestamp` | number | ✅ | 秒级 Unix 时间戳 |
+| `type` | number | ✅ | 消息类型（见下方对照表） |
+| `content` | string | null | ✅ |
+
+---
+
+## 消息类型对照表
+
+> **提示**
+> 若您的聊天记录中有其他特殊类型需要支持，请提交 issue 说明情况，我们会评估是否加入标准消息类型中。
+
+### 基础消息类型 (0-19)
+
+| 值 | 名称 | 说明 |
+| --- | --- | --- |
+| 0 | TEXT | 文本消息 |
+| 1 | IMAGE | 图片 |
+| 2 | VOICE | 语音 |
+| 3 | VIDEO | 视频 |
+| 4 | FILE | 文件 |
+| 5 | EMOJI | 表情包/贴纸 |
+| 7 | LINK | 链接/卡片 |
+| 8 | LOCATION | 位置 |
+
+### 交互消息类型 (20-39)
+
+| 值 | 名称 | 说明 |
+| --- | --- | --- |
+| 20 | RED_PACKET | 红包 |
+| 21 | TRANSFER | 转账 |
+| 22 | POKE | 拍一拍/戳一戳 |
+| 23 | CALL | 语音/视频通话 |
+| 24 | SHARE | 分享（音乐、小程序等） |
+| 25 | REPLY | 引用回复 |
+| 26 | FORWARD | 转发消息 |
+| 27 | CONTACT | 名片消息 |
+
+### 系统消息类型 (80+)
+
+| 值 | 名称 | 说明 |
+| --- | --- | --- |
+| 80 | SYSTEM | 系统消息（入群/退群/群公告等） |
+| 81 | RECALL | 撤回消息 |
+| 99 | OTHER | 其他/未知 |
+
+---
+
+## 头像格式说明
+
+头像字段 `avatar` 和 `groupAvatar` 使用 **Data URL** 格式：
+`data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD...`
+
+**支持的图片格式：**
+
+* `image/jpeg` - JPEG 格式（**推荐**，体积较小）
+* `image/png` - PNG 格式
+* `image/gif` - GIF 格式
+* `image/webp` - WebP 格式
+
+> **建议**
+> 导出时建议将头像压缩为 100×100 像素以内，以减小文件体积。
+
+---
+
+## 完整示例
+
+### 群聊示例（含可选字段）
+
+```json
+{
+  "chatlab": {
+    "version": "0.0.1",
+    "exportedAt": 1703001600,
+    "generator": "My Converter Tool",
+    "description": "2024年技术交流群聊天记录备份"
+  },
+  "meta": {
+    "name": "技术交流群",
+    "platform": "wechat",
+    "type": "group",
+    "groupId": "38988428513",
+    "groupAvatar": "data:image/jpeg;base64,/9j/4AAQSkZJRg..."
+  },
+  "members": [
+    {
+      "platformId": "abc123",
+      "accountName": "张三",
+      "groupNickname": "群主-张三",
+      "avatar": "data:image/jpeg;base64,/9j/4AAQSkZJRg..."
+    },
+    {
+      "platformId": "def456",
+      "accountName": "李四",
+      "groupNickname": "管理员",
+      "avatar": "data:image/jpeg;base64,/9j/4AAQSkZJRg..."
+    }
+  ],
+  "messages": [
+    {
+      "sender": "abc123",
+      "accountName": "张三",
+      "groupNickname": "群主-张三",
+      "timestamp": 1703001600,
+      "type": 0,
+      "content": "大家好！欢迎加入技术交流群~"
+    },
+    {
+      "sender": "def456",
+      "accountName": "李四",
+      "groupNickname": "管理员",
+      "timestamp": 1703001610,
+      "type": 1,
+      "content": "[图片: screenshot.jpg]"
+    }
+  ]
+}
+
+```
+
+### 私聊示例
+
+```json
+{
+  "chatlab": {
+    "version": "0.0.1",
+    "exportedAt": 1703001600
+  },
+  "meta": {
+    "name": "与小明的对话",
+    "platform": "qq",
+    "type": "private"
+  },
+  "members": [
+    {
+      "platformId": "123456789",
+      "accountName": "我",
+      "avatar": "data:image/jpeg;base64,/9j/4AAQSkZJRg..."
+    },
+    {
+      "platformId": "987654321",
+      "accountName": "小明",
+      "avatar": "data:image/jpeg;base64,/9j/4AAQSkZJRg..."
+    }
+  ],
+  "messages": [
+    {
+      "sender": "123456789",
+      "accountName": "我",
+      "timestamp": 1703001600,
+      "type": 0,
+      "content": "在吗？"
+    }
+  ]
+}
+
+```
+
+---
+
+## JSONL 流式格式
+
+JSONL（JSON Lines）格式适用于超大规模聊天记录（>100 万条），可避免内存溢出问题。
+
+### 格式特点
+
+* 每行一个 JSON 对象
+* 通过 `_type` 字段区分行类型：`header` / `member` / `message`
+* 内存占用恒定（约 100MB），支持 GB 级文件
+* 支持流式写入，可边导出边追加
+
+### 行类型说明
+
+| `_type` | 说明 | 是否必需 |
+| --- | --- | --- |
+| `header` | 文件头，包含 `chatlab` 和 `meta` | ✅ 必须在第一行 |
+| `member` | 成员信息 | - 可选 |
+| `message` | 消息记录 | ✅ 至少一条 |
+
+### 完整示例
+
+```jsonl
+{"_type":"header","chatlab":{"version":"0.0.1","exportedAt":1703001600},"meta":{"name":"技术交流群","platform":"qq","type":"group"}}
+{"_type":"member","platformId":"123456","accountName":"张三","groupNickname":"群主"}
+{"_type":"member","platformId":"789012","accountName":"李四"}
+{"_type":"message","sender":"123456","accountName":"张三","groupNickname":"群主","timestamp":1703001600,"type":0,"content":"大家好！"}
+{"_type":"message","sender":"789012","accountName":"李四","timestamp":1703001610,"type":0,"content":"你好！"}
+{"_type":"message","sender":"123456","accountName":"张三","groupNickname":"群主","timestamp":1703001620,"type":1,"content":"[图片]"}
+
+```
+
+### 解析规则
+
+1. **第一行必须是 header**：包含 `chatlab` 版本和 `meta` 元信息
+2. **成员行在消息之前**：可选，如果省略，成员信息会从消息中自动收集
+3. **消息按时间顺序排列**：建议按 `timestamp` 升序排列
+4. **每行独立完整**：单行解析错误可跳过继续处理
+5. **支持注释行**：以 `#` 开头的行会被跳过（可用于添加备注）
+
+> **注意**
+> * 每行必须是有效的 JSON（不能跨行）
+> * 行之间用换行符 `\n` 分隔
+> 
+> 
+
+---
+
+## 版本历史
+
+| 版本 | 日期 | 变更 |
+| --- | --- | --- |
+| 0.0.1 | 2025-12 | 初始版本 |
\ No newline at end of file
diff --git a/internal/chatlog/http/route.go b/internal/chatlog/http/route.go
index c8a58dd0..af53aa3f 100644
--- a/internal/chatlog/http/route.go
+++ b/internal/chatlog/http/route.go
@@ -15,6 +15,7 @@ import (
 	"github.com/xuri/excelize/v2"
 
 	"github.com/sjzar/chatlog/internal/errors"
+	"github.com/sjzar/chatlog/internal/model"
 	"github.com/sjzar/chatlog/pkg/util"
 	"github.com/sjzar/chatlog/pkg/util/dat2img"
 	"github.com/sjzar/chatlog/pkg/util/silk"
@@ -131,6 +132,20 @@ func (s *Service) handleChatlog(c *gin.Context) {
 	}
 
 	switch strings.ToLower(q.Format) {
+	case "chatlab":
+		talkerName := q.Talker
+		if len(messages) > 0 {
+			// Try to find a non-empty TalkerName from messages
+			for _, m := range messages {
+				if m.TalkerName != "" {
+					talkerName = m.TalkerName
+					break
+				}
+			}
+		}
+		
+		chatLabData := model.ConvertToChatLab(messages, q.Talker, talkerName)
+		c.JSON(http.StatusOK, chatLabData)
 	case "csv":
 		c.Writer.Header().Set("Content-Type", "text/csv; charset=utf-8")
 		c.Writer.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%s_%s_%s.csv", q.Talker, start.Format("2006-01-02"), end.Format("2006-01-02")))
diff --git a/internal/chatlog/http/static/index.htm b/internal/chatlog/http/static/index.htm
index e1b119f8..85ee05c5 100644
--- a/internal/chatlog/http/static/index.htm
+++ b/internal/chatlog/http/static/index.htm
@@ -447,6 +447,7 @@
                     <label>输出格式</label>
                     <select id="chatlog-format">
                         <option value="json">JSON (预览)</option>
+                        <option value="chatlab">ChatLab JSON</option>
                         <option value="csv">CSV 导出</option>
                         <option value="xlsx">Excel 导出</option>
                         <option value="text">纯文本</option>
@@ -877,7 +878,7 @@
                     if (!res.ok) throw new Error(res.statusText);
                     
                     let text;
-                    if(format === 'json') {
+                    if(format === 'json' || format === 'chatlab') {
                         const json = await res.json();
                         text = JSON.stringify(json, null, 2);
                     } else {
@@ -887,7 +888,10 @@
                     resultArea.innerHTML = `
                         <div class="result-header">
                             <span class="url-display">${url}</span>
-                            <button class="btn btn-secondary text-sm" onclick="copyResult('${type}')">复制</button>
+                            <div style="display:flex; gap:10px;">
+                                <button class="btn btn-secondary text-sm" onclick="downloadResult('${type}', '${format}')">下载</button>
+                                <button class="btn btn-secondary text-sm" onclick="copyResult('${type}')">复制</button>
+                            </div>
                         </div>
                         <pre id="${type}-pre">${escapeHtml(text)}</pre>
                     `;
@@ -898,6 +902,31 @@
             }
         }
 
+        function downloadResult(type, format) {
+            const text = document.getElementById(`${type}-pre`).innerText;
+            let mimeType = 'text/plain';
+            let ext = 'txt';
+            
+            if (format === 'json' || format === 'chatlab') {
+                mimeType = 'application/json';
+                ext = 'json';
+            }
+
+            const blob = new Blob([text], { type: mimeType });
+            const url = URL.createObjectURL(blob);
+            const a = document.createElement('a');
+            a.href = url;
+            
+            // Filename: type_timestamp.ext
+            const timestamp = new Date().toISOString().replace(/[:.]/g, '-').slice(0, 19);
+            a.download = `${type}_export_${timestamp}.${ext}`;
+            
+            document.body.appendChild(a);
+            a.click();
+            document.body.removeChild(a);
+            URL.revokeObjectURL(url);
+        }
+
         function escapeHtml(text) {
             if (!text) return text;
             return String(text)
diff --git a/internal/model/chatlab.go b/internal/model/chatlab.go
new file mode 100644
index 00000000..f2557214
--- /dev/null
+++ b/internal/model/chatlab.go
@@ -0,0 +1,241 @@
+package model
+
+import (
+	"time"
+)
+
+// ChatLab format constants
+const (
+	ChatLabTypeText     = 0
+	ChatLabTypeImage    = 1
+	ChatLabTypeVoice    = 2
+	ChatLabTypeVideo    = 3
+	ChatLabTypeFile     = 4
+	ChatLabTypeEmoji    = 5
+	ChatLabTypeLink     = 7
+	ChatLabTypeLocation = 8
+
+	ChatLabTypeRedPacket = 20
+	ChatLabTypeTransfer  = 21
+	ChatLabTypePoke      = 22
+	ChatLabTypeCall      = 23
+	ChatLabTypeShare     = 24
+	ChatLabTypeReply     = 25
+	ChatLabTypeForward   = 26
+	ChatLabTypeContact   = 27
+
+	ChatLabTypeSystem = 80
+	ChatLabTypeRecall = 81
+	ChatLabTypeOther  = 99
+)
+
+type ChatLab struct {
+	ChatLab  ChatLabHeader    `json:"chatlab"`
+	Meta     ChatLabMeta      `json:"meta"`
+	Members  []ChatLabMember  `json:"members"`
+	Messages []ChatLabMessage `json:"messages"`
+}
+
+type ChatLabHeader struct {
+	Version     string `json:"version"`
+	ExportedAt  int64  `json:"exportedAt"`
+	Generator   string `json:"generator,omitempty"`
+	Description string `json:"description,omitempty"`
+}
+
+type ChatLabMeta struct {
+	Name        string `json:"name"`
+	Platform    string `json:"platform"`
+	Type        string `json:"type"`
+	GroupID     string `json:"groupId,omitempty"`
+	GroupAvatar string `json:"groupAvatar,omitempty"`
+}
+
+type ChatLabMember struct {
+	PlatformID    string   `json:"platformId"`
+	AccountName   string   `json:"accountName"`
+	GroupNickname string   `json:"groupNickname,omitempty"`
+	Aliases       []string `json:"aliases,omitempty"`
+	Avatar        string   `json:"avatar,omitempty"`
+}
+
+type ChatLabMessage struct {
+	Sender        string `json:"sender"`
+	AccountName   string `json:"accountName"`
+	GroupNickname string `json:"groupNickname,omitempty"`
+	Timestamp     int64  `json:"timestamp"`
+	Type          int    `json:"type"`
+	Content       string `json:"content"`
+}
+
+// ConvertToChatLab converts a slice of internal Messages to ChatLab format
+func ConvertToChatLab(messages []*Message, talkerID string, talkerName string) ChatLab {
+	cl := ChatLab{
+		ChatLab: ChatLabHeader{
+			Version:    "0.0.1",
+			ExportedAt: time.Now().Unix(),
+			Generator:  "Chatlog",
+		},
+		Meta: ChatLabMeta{
+			Name:     talkerName,
+			Platform: "wechat",
+			Type:     "private",
+		},
+		Members:  make([]ChatLabMember, 0),
+		Messages: make([]ChatLabMessage, 0, len(messages)),
+	}
+
+	if talkerName == "" {
+		cl.Meta.Name = talkerID
+	}
+
+	// Infer chat type
+	isGroup := false
+	if len(talkerID) > 9 && talkerID[len(talkerID)-9:] == "@chatroom" {
+		cl.Meta.Type = "group"
+		cl.Meta.GroupID = talkerID
+		isGroup = true
+	}
+
+	memberMap := make(map[string]ChatLabMember)
+
+	for _, msg := range messages {
+		// Map Message Type
+		clType := ChatLabTypeText
+		content := msg.Content
+
+		// Refine Content and Type
+		switch msg.Type {
+		case MessageTypeText:
+			clType = ChatLabTypeText
+		case MessageTypeImage:
+			clType = ChatLabTypeImage
+			if path, ok := msg.Contents["path"].(string); ok {
+				content = path
+			} else if md5, ok := msg.Contents["md5"].(string); ok {
+				content = md5
+			} else {
+				content = "[图片]"
+			}
+		case MessageTypeVoice:
+			clType = ChatLabTypeVoice
+			content = "[语音]"
+		case MessageTypeVideo:
+			clType = ChatLabTypeVideo
+			content = "[视频]"
+		case MessageTypeAnimation:
+			clType = ChatLabTypeEmoji
+			if cdnURL, ok := msg.Contents["cdnurl"].(string); ok {
+				content = cdnURL
+			} else {
+				content = "[表情]"
+			}
+		case MessageTypeLocation:
+			clType = ChatLabTypeLocation
+			label, _ := msg.Contents["label"].(string)
+			if label != "" {
+				content = label
+			} else {
+				content = "[位置]"
+			}
+		case MessageTypeCard:
+			clType = ChatLabTypeContact
+			content = "[名片]"
+		case MessageTypeVOIP:
+			clType = ChatLabTypeCall
+			content = "[通话]"
+		case MessageTypeSystem:
+			clType = ChatLabTypeSystem
+		case MessageTypeShare:
+			// Default share type
+			clType = ChatLabTypeShare
+			
+			switch msg.SubType {
+			case MessageSubTypeFile:
+				clType = ChatLabTypeFile
+				if title, ok := msg.Contents["title"].(string); ok {
+					content = title
+				}
+			case MessageSubTypeLink, MessageSubTypeLink2:
+				clType = ChatLabTypeLink
+				if url, ok := msg.Contents["url"].(string); ok {
+					content = url
+				}
+			case MessageSubTypeMergeForward, MessageSubTypeNote, MessageSubTypeChatRoomNotice:
+				clType = ChatLabTypeForward
+				if title, ok := msg.Contents["title"].(string); ok {
+					content = title
+				}
+			case MessageSubTypeMiniProgram, MessageSubTypeMiniProgram2:
+				clType = ChatLabTypeShare
+				if title, ok := msg.Contents["title"].(string); ok {
+					content = title
+				}
+			case MessageSubTypeQuote:
+				clType = ChatLabTypeReply
+				// In ChatLab, content is the reply text. 
+				// Structure for reply is usually just text, but maybe with some ref?
+				// Spec says 25 is REPLY.
+				// We keep the text content as is.
+			case MessageSubTypePat:
+				clType = ChatLabTypePoke
+			case MessageSubTypeMusic:
+				clType = ChatLabTypeShare
+				if url, ok := msg.Contents["url"].(string); ok {
+					content = url
+				}
+			case MessageSubTypePay:
+				clType = ChatLabTypeTransfer
+			case MessageSubTypeRedEnvelope, MessageSubTypeRedEnvelopeCover:
+				clType = ChatLabTypeRedPacket
+				content = "[红包]"
+			}
+		default:
+			clType = ChatLabTypeOther
+		}
+
+		// Handle Self Name
+		senderName := msg.SenderName
+		if msg.IsSelf && senderName == "" {
+			senderName = "我"
+		}
+
+		clMsg := ChatLabMessage{
+			Sender:      msg.Sender,
+			AccountName: senderName,
+			Timestamp:   msg.Time.Unix(),
+			Type:        clType,
+			Content:     content,
+		}
+
+		// For groups, we might have group nicknames. 
+		// Internal model has 'SenderName' which is usually the display name in chat (Remark or NickName).
+		// In WeChat, the 'Remark' is personal to the observer, 'NickName' is global. 
+		// Group Alias is specific to the room. 
+		// Our 'SenderName' logic in db/message might already be mixing these. 
+		// We'll map SenderName to AccountName for now.
+		if isGroup {
+			clMsg.GroupNickname = senderName // Assume SenderName is the display name in group
+		}
+
+		cl.Messages = append(cl.Messages, clMsg)
+
+		// Collect Member
+		if _, exists := memberMap[msg.Sender]; !exists {
+			member := ChatLabMember{
+				PlatformID:  msg.Sender,
+				AccountName: senderName,
+			}
+			if isGroup {
+				member.GroupNickname = senderName
+			}
+			memberMap[msg.Sender] = member
+		}
+	}
+
+	for _, m := range memberMap {
+		cl.Members = append(cl.Members, m)
+	}
+
+	return cl
+}
\ No newline at end of file