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Networking Freeware
from Paessler

On this web page we provide free network monitoring tools from our labs. The set of free network tools includes "top sellers" as PRTG Network Monitor, as well as small but useful helpers for your daily work. We also use these network monitoring tools to manage our own network and to diagnose and test our software products. All these programs are provided for free. Please understand that we can not provide one-to-one technical support for these products. Please ask questions in our Knowledge Base.

Tobias, QA Engineer at Paessler AG

PRTG Network Monitor:
Our Flagship Product

Do you want to monitor a network of 10, 100 or 1000 nodes? Looking for a reliable and professional network monitoring software that is easy to set up? You have come to the right place!

With the freeware of PRTG you can start with reliable monitoring for your network in less than 5 minutes.

We have embedded 15 years of monitoring experience into our software so you don't have to worry about the technical details.


Other Free Network Monitoring Tools:

Billing Add-On for Users of PRTG Network Monitor

Billing Tool

The PRTG Billing Tool is an application that can read PRTG sensor data and generate bills in PDF format. Managed Service Providers (MSPs) can use this tool to bill their customers for traffic and/or network usage reported by PRTG.

More info and download

Multi Protocol Device Simulation

Multi Server Simulator

For testing purposes, Multi Server Simulator simulates large, virtual HTTP, FTP, SMTP, or DNS server networks, as well as SNMP-based network switches using a standard Windows PC. It is an indispensable tool for the evaluation and testing of network management and network testing tools.

More info and download

SNMP/MIB Related Tools

MIB Importer

Imports SNMP MIB (Management Information Base) files and converts them into OID libraries for PRTG Network Monitor.

More info and download



SNMP Tester

SNMP Tester can run simple SNMP requests against a device in a network to debug SNMP requests down to the protocol level in order to find communication and/or data problems in SNMP monitoring configurations.

More info and download

Certificate Related Tools

PRTG Certificate Importer

The PRTG Certificate Importer eases the installation of a trusted certificate on your PRTG server to avoid the browser's SSL certificate warning when you access the PRTG web interface. It combines and converts all files issued by a certificate authority (CA) automatically for the use with PRTG and saves the certificate files into the correct path on your PRTG server. This makes importing a trusted SSL certificate rather comfortable!

More info and download

Reporting Related Tools

Data Extractor (discontinued)

The PRTG Data Extractor can retrieve raw monitoring data from the internal database of your PRTG server and write this data into a Microsoft SQL database. Please note that this tool has been discontinued.

More info and download

Network Card Related Tools

Local IP Lister

Paessler Local IP Lister shows the list of IP addresses that are configured on your PC.

More info and download

NetFlow and sFlow Related Tools

NetFlow Generator

Simulates Netflow 5 data streams and can be used to test the Netflow functionality of PRTG 6, PRTG 7 and other NetFlow 5 compatible programs

More info and download



NetFlow Tester

NetFlow Tester simply dumps the data of all NetFlow 5 packets that a computer receives from a Cisco router - useful when debugging bandwidth monitoring configurations based on NetFlow protocol.

More info and download



sFlow Tester

This program dumps the data of all sFlow packets that a computer receives from an sFlow enabled router - useful when debugging bandwidth monitoring configurations based on sFlow protocol.

More info and download

WMI Related Tools

WMI Tester

Tests the accessibility of WMI (Windows Management Instrumentation) counters in a quick and easy manner.

More info and download

HTTP Web Server Related Tools

Webserver Stress Tool

Webserver Stress Tool is a powerful HTTP-client/server test application designed to pinpoint critical performance issues in your web site or web server that may prevent optimal experience for your site's visitors.

More info and download



Site Inspector

A Web browser that combines the two most frequently used browser engines (Internet Explorer and Mozilla/Gecko) into one program. Its advanced web page analysis features make it the perfect companion for webmasters and web developers.

More info and download



URL Recorder

Find out the URLs and the POSTDATA strings that a user sends to a web server while surfing a sequence of URLs - useful when setting up HTTP Transaction sensors of PRTG Network Monitor.

More info and download

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