> For the complete documentation index, see [llms.txt](https://docs.mluvii.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.mluvii.com/en/for-it-specialists/customization/customized-forms/offline-forms.md).
# Offline forms
To create an **offline form** you must complete several steps:
* Create an HTML document that will contain the required fields.
* Add CSS styles.
* Use the “JavaScript method” to send data from the form.
* Upload the created form to any hosting that supports the **HTTPS** protocol and add a link to the form in the administration interface.
We recommend creating an offline form using the codepen.io web application for simplicity and clarity.
```
Entry:
Create a customized offline form that contains Email or Phone and allows to write a message.
```
### How will the form look?
### How to begin
You can start by clicking on [this link](https://codepen.io/pen?template=pdOQQG).
#### Adding HTML
The code editor we use is linked to [the bootstrap framework](https://getbootstrap.com/docs/4.0/components/forms/).
#### Adding CSS
#### Adding JavaScript code
#### Available API’s
**How to send an offline form?**
```js
window.parent.postMessage({
type: "OFFLINE_ACTION",
contact,
message
}, "*");
```
#### JavaScript code of our example
### Upload a form to any hosting
In our case, click the **Save** button first, then export to **.zip** format (see instructions below).
We have a form prepared, now you need to upload the form to the Internet so we can refer to it from the administration interface. In our case, we will use the GitHub site. You can find more information [here](https://pages.github.com/).
If you use a tool other than codepen.io, the form code will look like this:
```html
Your custom text here
```
### The last step
You created an offline form using codepen.io. You have exported it to your computer. You have uploaded exported folders to the GitHub repository and then switched on the GitHub website. This brings you a link to our form, which you insert into the administration interface.
---
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