> ## Documentation Index
> Fetch the complete documentation index at: https://notes.kodekloud.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Demo Markup Formatters
> Learn to use the Jenkins Markup Formatter for formatted text in various Jenkins components while ensuring protection against XSS attacks.
In this guide, you’ll learn how to use the Jenkins Markup Formatter to add formatted text—including HTML tags—into Views, Jobs, Builds, and System Messages, while maintaining protection against cross-site scripting (XSS) attacks.
## Default Formatter Behavior
By default, Jenkins uses the **Plain Text** formatter. It escapes all HTML tags and displays exactly what you type.
The Plain Text formatter is safe but does not render any HTML. Switch to Safe HTML if you need styled markup.
## Editing the System Message
1. In Jenkins, navigate to **Manage Jenkins** > **Configure System**.
2. Scroll down to **System Message** and enter your HTML. For example:
```html theme={null}
Server maintenance scheduled at 10 PM UTC.
- Service A
- Service B
```
If you click **Save** or **Apply** now, the message still appears as plain text because the formatter is unchanged.
## Changing the Markup Formatter
1. Go to **Manage Jenkins** > **Configure Global Security**.
2. Locate the **Markup Formatter** section.
3. Change **Plain Text** to **Safe HTML**.
4. Click **Save** to apply.
| Formatter | Description | Common Allowed Tags |
| ---------- | ----------------------------------------------------- | ------------------------------------------ |
| Plain Text | Escapes all HTML; displays raw input. | — |
| Safe HTML | Sanitizes a predefined subset of tags to prevent XSS. | ``, ``, ``, ``, `- ` |
Safe HTML strips any disallowed tags or attributes. Avoid embedding `