> For the complete documentation index, see [llms.txt](https://docs.xenioo.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.xenioo.com/basic-concepts/publishing/channels/whatsapp/opt-in-qrcode.md).
# Opt-in QR code generation
It is possible to generate an opt-in QR code, which can be used to easily distribute and share access to the chatbot, allowing users to quickly start a conversation.
* When the **Save** button is clicked, the QR code image is automatically updated.
* Users can click on the QR code image to download it as a file for further use.
* It is possible to generate a **dynamic QR code**.\
The QR image never changes because it encodes a **fixed URL**.\
That URL performs a redirect to the opt-in flow.
* Once the dynamic QR code is generated, the encoded URL remains valid and continues to work for opt-in **as long as the bot or the account exists**.\
If the bot or the account is deleted, the URL stops working.
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