> For the complete documentation index, see [llms.txt](https://docs.maiagent.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.maiagent.ai/tech/maiagent-tech-en/lineliff/whatislineliff.md).

# What is LINE LIFF

### <mark style="color:blue;">Concept of LINE LIFF:</mark>

LINE LIFF (LINE Front-end Framework) is a web application framework provided by LINE that allows developers to build web applications within the LINE application.

Through LIFF, developers can embed custom web applications in LINE chat windows and interact with users using various LINE features, such as reading LINE user information, sending messages, sharing content, etc.

### <mark style="color:blue;">Features of LINE LIFF:</mark>

* **Embedded Web Applications**

  Web pages can be embedded into LINE, allowing users to open and use them directly in chat or other scenarios.
* **Access to LINE Features**

  Using the LIFF API, you can obtain users' basic information (such as username, LINE User ID) or use LINE features like sending messages and adding friends.
* **Cross-platform**

  LIFF applications can be used on various devices, including mobile phones (iOS and Android) and desktop browsers, as long as LINE supports them.
* **Easy Development and Deployment**

  Developers only need to deploy a web application and register it on the LINE Developers platform to easily allow users to access the application through LINE.

### <mark style="color:blue;">**Use Cases for LINE LIFF:**</mark>

* **Membership Systems**
  * Use LIFF to integrate member data, enabling users to log in with one click and link their LINE accounts.
* **E-commerce**
  * Provide product lists and shopping cart functionality in chats, integrated with payment processes.
* **Marketing Campaigns**
  * Create interactive campaign pages, such as lucky draws and surveys, for user participation and sharing with friends.
* **Customer Service**
  * Embed query systems or chatbot interaction features for instant responses.


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