PRTG: The all-in-one
web server monitoring solution

  • PRTG monitors the availability of your web servers
  • PRTG monitors CPU, memory, and web server performance
  • PRTG monitors your website and its load times

Free Download
  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime


PRTG hosted for you


Availability and performance are crucial

Your website is the face of your business. And if products and services are offered via your homepage, then your website becomes a decisive factor in your company’s success.

Along with an attractive design and intuitive user interface, performance is one of the most important factors for determining the effectiveness of your website. Long load times frustrate users and increase bounce rates – which can consequently lead to a drop in sales.

Website crashes, however, are even worse. The more dependent your company is on its website, the greater the costs of an eventual crash – even if the downtime only lasts for a few minutes.

An introduction to web server monitoring with PRTG

Web server monitoring is a must for getting the most out of your website


To avoid website downtime and poor performance, consider monitoring your web server with PRTG. If potentially problematic values appear, you’ll immediately receive a notification and can therefore intervene quickly – usually before your web server actually goes down.

With PRTG, a quick glance is all it takes to see if everything is OK. Sit back, relax, and enjoy the feeling of knowing your web server is in perfect working order.


Keep a constant eye on your website


Promptly determine if your web server is overloaded

PRTG lets you keep a constant eye on all the most important values affecting your server and website. By monitoring load times, response times, transactions, and content, you’ll immediately be informed if your site is overextended, offline, or simply taking too long to load. PRTG will send you an email, SMS, or push notification so you can get to work at once.

User Experience

Ensure the ultimate user experience

Your goal as a webmaster should be to provide your visitors with as enjoyable an experience as possible. Along with helpful and valuable content, load times play an extremely vital role. Web servers not only supply content, but also perform user authentication, security certificate maintenance, encryption, and the logging of activities.

Quickly see if your web servers are up and running
– even while on the go

PRTG can be started within minutes and it's compatible with many mobile devices.


PRTG comes with all the features you need, plus more your IT infrastructure won't want to live without.


PRTG monitors these vendors and applications, and more, in one view!


How PRTG monitors your web server




Behind every website and web service, there is a server. If memory is low or RAM and CPU are overloaded, then the services found on the corresponding server will not be running properly. Thanks to the PRTG Web Server Monitoring Tool, you can keep an eye on important hardware data such as memory, CPU usage, and the capacity of your hard drives.


Performance and traffic

PRTG monitors the key performance values of your web server by measuring (among other things) total traffic, available bandwidth, and the number of current sessions. It also displays the load times of both entire websites as well as individual page elements. Thanks to the PRTG Cloud HTTP sensors, you can easily monitor load times from locations all over the world, and therefore offer your customers the best possible user experience, wherever they happen to be. All data can be filtered as desired and presented on easy-to-read PRTG dashboard.

iBandwidth is measured as the amount of data that can be transferred from one point to another within a network in a specific amount of time. Typically, bandwidth is expressed as a bitrate and measured in bits per second (bps). It refers to the transmission capacity of a connection and is an important factor when determining the quality and speed of a network.   Read more ...

PRTG sensors for monitoring your website


iWhat is a sensor?

In PRTG, “Sensors” are the basic monitoring elements. One sensor usually monitors one measured value in your network, e.g. the traffic of a switch port, the CPU load of a server, the free space of a disk drive. On average you need about 5-10 sensors per device or one sensor per switch port.

View video (3:26 min.)

Predefined sensors

Predefined sensors

PRTG comes equipped with predefined sensors for the fully automatic monitoring of the various parameters of your website. For example, the HTTP Sensor monitors the availability of your site, while the HTTP Full Web Page Sensor keeps an eye on the load times of an entire website, including all images. The HTTP Transaction Sensor can be used to monitor processes (such as an online order from A to Z). Finally, the HTTP Content Sensors checks the content of a website and the HTTP Data Advanced Sensor monitors the XML and JSON file values that are returned by a web server.

Sensors for Apache web servers

Sensors for Apache web servers

PRTG also offers two types of sensors for your Apache web server. These sensors are available by default, and provide a constant overview of the availability, requests, transferred data, uptime, and CPU load of your Apache server.

Find out more about these sensors and website monitoring here.

200,000 system administrators worldwide
trust our software. Every day.

We have compiled some reviews for you.



  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime

“I particularly like having breakfast at home and just surveying my domain, and understanding what's working and what isn't.”

Steve Coppin, Oxford University

PRTG is your all-in-one web server monitoring tool





i Ping is a command-line utility, available on virtually any operating system with network connectivity, that acts as a test to see if a networked device is reachable. The ping command sends a request over the network to a specific device. A successful ping results in a response from the computer that was pinged back to the originating computer. Read more ...


A wide range of features

  • Website monitoring via HTTP and Ping
  • Load time monitoring for the entire website or individual elements
  • Transaction and content monitoring
  • Compatibility with all popular web servers (e.g. IIS, Apache)
  • Website monitoring from remote locations
  • Queries of XML and JSON files



  • Documented APIs and easy query creation
  • Notifications and comprehensive alarm functions
  • Simple documentation with customized reports
  • Accurate long-term evaluation thanks to complete monitoring data logs


Other benefits

  • Easy to use
  • Transparent licensing
  • Outstanding price-performance ratio

PRTG simplifies your day

Our monitoring software works for you and promptly notifies you of potential issues.
It frees you to concentrate on your day-to-day tasks with peace of mind.


PRTG saves time

With PRTG, you get one central monitoring tool for your servers and entire network. Enjoy a quick overview of your whole infrastructure via our dashboard and app.

PRTG saves worry

Customizing PRTG is a breeze. Getting started or switching from another network monitoring tool is easy thanks to the PRTG auto-discovery and pre-configured device templates.

PRTG saves money

80% of our customers report substantial or even exceptional cost savings in the area of network monitoring. The experience shows that the costs for licenses have paid for themselves within a matter of weeks.



Also interesting:


Services: PRTG monitors a lot of network and computer services and technologies like Active Directory, FTP, VoIP, SSH, or VPN. Find out more about these topics on our specific topic pages.

NTP Monitoring: The NTP Sensor continuously compares the times of your network devices with the times of a precise NTP server. This allows all network log files to be compared with one another. Find out more about NTP Monitoring here.

Flow Monitoring: Get a holistic view about your network, keep an eye on your network traffic and what your bandwidth is being used for. PRTG supports all important Flow protocols like NetFlow, sFlow, jFlow, and IPFIX.


ebook cloud roadmap

Thinking of going to the cloud with your IT?
Here is our proven roadmap

There are many questions to answer before moving your IT to the cloud, so Paessler offers
a free ebook that could help you.

Get your free copy of our cloud ebook now.

PRTG: The swiss army knife for sys admins

Adapt PRTG individually and dynamically to your needs relying on a strong API:

  • HTTP API: Access monitoring data and manipulate monitoring objects using HTTP requests
  • Custom Sensors: Create your own sensors for customized monitoring
  • Custom Notifications: Create your own notifications to send alarms to external systems
  • New REST API Sensor: Monitor almost everything that provides XML or JSON

Award winning solution

We work hard on making our software as powerful and easy-to-use
as possible for our customers each and every day.
Of course it makes us proud when we get awards for that.



Over 95% of our customers recommend PRTG


Paessler AG worldwide trialled PRTG in over 600 IT departments.
The aim was to tune the network monitoring software closer to the needs of the administrators.
The result of the survey: over 95% of the participants would recommend PRTG - or already had.

Recommend PRTG

German quality

Free Download
  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime


Made in Germany: The PRTG Network Monitoring Tool is the fruit of a dedicated, international team. The company was founded by Dirk Paessler. The Paessler AG headquarters are located in the city of Nuremberg, in the heart of Germany.

A quick overview: PRTG provides a quick overview, whether on your desktop or as an app on your smartphone. An individually configurable dashboard features every key stat in the form of an easy-to-understand graph, so you can always make sure your network is running smoothly.

Easy configuration: Our Smart Setup guarantees a quick and easy setup. During configuration, PRTG will ping your network and create appropriate sensors, saving you a great deal of time. Furthermore, switching from other software such as Nagios is relatively quick and easy.

Outstanding support: Our support team strives to resolve inquiries within 24 hours (on business days). Discover a wide selection of videos, webinars, and instructions in our knowledge base. Our manual is also an excellent resource.

Getting started is easy: The trial version is for free, allowing you to evaluate our monitoring tool with no strings attached. To upgrade, simply search for a suitable license. You can modify your license any time you like. 


Network Monitoring Software - Version (November 25th, 2019)


Download for Windows and hosted version available


English, German, Spanish, French, Portuguese, Dutch, Russian, Japanese, and Simplified Chinese


Up to 100 sensors for free (Price List)

Unified Monitoring

Network devices, bandwidth, servers, applications, virtual environments, remote systems, IoT, and more

Supported Vendors & Applications