Free Sniffer: PRTG lets you...

  • Monitor data packets
  • Filter by IP address
  • Filter by protocol
  • Filter by data type
  • Get started with PRTG today. It’s free and there are no strings attached.


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

Free network sniffer:
Use our Packet Sniffer Sensor for a quick overview of...



  • Total traffic
  • Web traffic
  • Mail traffic
  • File transfers
  • Top Talkers
  • Top Connections
  • Top Protocols
  • More than 200 preconfigured PRTG sensors


Know what you’re looking for?

3 good reasons to choose the PRTG Network Monitor


Get to the root of the problem. Pronto.

Get to the root of the problem. Pronto.

Looking for a quick overview of your network traffic? Or maybe you’d like to solve a specific problem relating to data packets, IP addresses, or protocols? Download the free version of PRTG today and enjoy all the software’s features for 30 days for free. 

Get a handle on your network. Once and for all.

Get a handle on your network. Once and for all.

Is your IT infrastructure becoming more and more complex? Are you struggling with network problems? If so, then you’re in the same boat as many other IT managers. Increased complexity creates more work and stress. With PRTG, you’ll finally take control of your network. If something goes awry, you’ll be notified at once.

Try PRTG for free. Decide later.

Try PRTG for free. Decide later.

You're the expert...but not the only one involved in the decision-making process. We therefore let you try PRTG for 30 days for free. You get access to all the software’s features, including the alarm, reports, and full range of sensors. After the trial, you – and your higher-ups – will know if PRTG is the right tool for your company.

Convince your boss with the
following PRTG fact sheet


Bring this to your boss (pdf)


Inside PRTG: A sneak peek at the PRTG user interface


The limits of PRTG as a sniffer tool

What can PRTG do for you?

What can PRTG do for you?

PRTG displays the data traffic in your network. You'll see the amount and source of all the traffic that flows through your network. Such sources can include applications, mail traffic, or web traffic. PRTG offers continuous monitoring and targeted troubleshooting.

PRTG as a basis for analyses

PRTG as a basis for analyses

Looking to capture and record detailed information on the content of individual data packets for analysis purposes? If so, you might want to consider using another network sniffer tool such as Wireshark in addition to PRTG.

Tools that work well together

Tools that work well together

We’ve found that sysadmins often use PRTG in conjunction with other tools. PRTG lets you quickly isolate network problems. With a quick glance at your data traffic, you’ll be able to immediately exclude certain causes. You can then use another tool to perform a more detailed analysis.

Keep a constant eye on your network
– 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!


Stephan Linke Zitat

“Hey Stephan, do you have any tips for packet sniffing with PRTG?”

“The Packet Sniffer Sensor allows you to analyze traffic in your network in much the same way as deep packet inspection. You can see, for example, if mail traffic is alarmingly high, or if P2P file sharing is being used in your company network and thus posing a risk to network security.”

Stephan Linke, Paessler Technical Support

Decision time: When the free version makes sense
– and when the full version is a better permanent solution


Free Sniffer Tool

Free Sniffer Tool

Looking for a quick and easy way to solve a specific network problem? If so, then PRTG may be the tool for you. With our Packet Sniffer Sensor, you get a preconfigured sensor that sniffs data packets. What’s more, you’ll enjoy free access to all PRTG features for 30 full days. After the trial, the free version may be your best bet if you’re in charge of a small network. In the free version, you'll simply choose the sensors you need the most, such as the Ping Sensor to check network availability and the SNMP Sensor to keep a constant eye on total network traffic.

Netzwerk Monitoring Tool

Network Monitoring Tool

If you’re the manager of a larger network and in search of a permanent monitoring solution, then PRTG can help. PRTG comes with 200+ preconfigured sensors, as well as a fully customizable notification system. PRTG dashboards provide for a constant overview, while reports allow you to show your higher-ups the areas of the network that need improvement and where you ought to invest. Licenses are determined by the number of sensors you require for your network. They’re easy to upgrade in the event that your needs or infrastructure evolve.

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

More than just a network sniffer for Windows: PRTG monitors your entire network


Keep databases up and running

Keep databases up and running

PRTG comes with preconfigured sensors for all the largest database systems, including MySQL, Microsoft SQL, Oracle SQL, and PostgreSQL, to name a few. With database monitoring, you’ll prevent downtime and improve performance.

Ensure hardware doesn’t crash

Ensure hardware doesn’t crash

Serversroutersswitches: A network contains countless different devices, and an error or malfunction can occur anywhere. Without a monitoring tool, you can spend hours or even days searching for a failed switch. PRTG doesn’t wait until the system crashes – it immediately notifies you in the event of a disruption and shows you where the problem lies.

Keep cloud applications stable

Keep cloud applications stable

If cloud applications run properly, they can save your company money. But when they go down, they can be the source of a great deal of frustration. PRTG lets you set up cloud monitoring, whether you use VMware, Amazon CloudWatch, or any other cloud application. Here too, its numerous preconfigured sensors are extremely handy.

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.



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

white paper snmp

You want to know in detail what SNMP is?

In our white paper you will discover why SNMP is still a standard protocol in monitoring today, the details on how SNMP works, and what the future holds for this monitoring protocol.

Get your free copy of our SNMP white paper now.


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 engineering




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

Most administrators want to test a tool for free before deciding to make an investment.

The many advantages of PRTG:

1. Free trial version: Take the time to explore PRTG so you can determine if it satisfies your needs and meets your expectations. Once the trial is over, it’s easy to upgrade your already configured version of PRTG, which means you’re much less likely to make an incorrect purchase.

2. One tool, one overview: Administrators often use a variety of monitoring solutions for their network or for the individual components of their infrastructure. But using several different tools every time you want to create an overview costs time and energy. PRTG is an “all-in-one” solution. Our dashboard and app provide a comprehensive overview, whenever you want it.

3. Quick customer support: Got a question? Stuck on a problem and need a hand? PRTG is backed by a dedicated development and support team. We do our utmost to answer every customer inquiry within 24 hours (on business days). Browse all our support topics here.

Configure your PRTG today. The trial version is free of charge. Save time, worry, and money with our monitoring tool designed for your network and entire infrastructure.



Network Monitoring Software - Version (October 29th, 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