---
title: "Page Size Check"
description: "The Page Size Check monitors the size of your website's HTML response content (body) in bytes. Unexpected changes in file size can indicate serious issues that are missed by a pure status code check (200 OK)."
---

## Use Cases

- **Hacks / Defacements**: Attackers often inject code, significantly increasing the page size.
- **Empty Pages**: A database error could cause only the header to render (page suddenly very small), although the server reports Status 200.
- **Performance**: Accidentally including huge scripts or CSS files in the HTML.

## Configuration
You can define thresholds:

### Min Page Size
Alert if the page is smaller than X bytes.

- *Recommendation*: Set this to approx. 80-90% of your page's normal size to detect partially empty renderings.

### Max Page Size
Alert if the page is larger than Y bytes.

- *Recommendation*: Protects against "code bloat" or injections.

The check is considered failed if the actual size is outside this range.