Wireshark

Wireshark is the world's foremost network protocol analyzer. It lets you capture and interactively browse the traffic running on a computer network. It is the de...

Free Open Source Mac Windows Linux BSD

tcpdump

tcpdump is a common packet analyzer that runs under the command line. It allows the user to intercept and display TCP/IP and other packets being transmitted or received...

Free Open Source Mac Windows Linux BSD

netcat

Netcat is a featured networking utility which reads and writes data across network connections, using the TCP/IP protocol. It is designed to be a reliable...

Free Open Source Mac Windows Linux

Nethogs

NetHogs is a small 'net top' tool. Instead of breaking the traffic down per protocol or per subnet, like most tools do, it groups bandwidth by process. NetHogs...

Free Open Source Linux Xfce

Microsoft Message Analyzer

Message Analyzer enables you to capture, display, and analyze protocol messaging traffic; and to trace and assess system events and other messages from Windows...

Free Windows

Ettercap

Ettercap is a suite for man in the middle attacks on LAN. It features sniffing of live connections, content filtering on the fly and many other interesting tricks. It...

Free Open Source Mac Windows Linux

Intercepter-NG

Intercepter-NG is a multifunctional network toolkit for various types of IT specialists. The main purpose is to recover *interesting* data from the network stream and...

• Discontinued App unavailable on Play Store and website is flagged by modern browsers as potentially malicious.
• Warning Website blocked by modern browsers as possible trojan.

Free Mac Windows Linux Android iPhone ... Android Tablet BSD iPad

Sysdig

Sysdig is open source, system-level exploration: capture system state and activity from a running Linux instance, then save, filter and analyze. Think of it as strace +...

Free Open Source Mac Windows Linux

SmartSniff

SmartSniff is a packet sniffer that capture TCP/IP packets and display them as sequence of conversations between clients and servers. You can view the TCP/IP...

Free Windows

Microsoft Network Monitor

Microsoft Network Monitor is a packet analyzer. It enables capturing, viewing, and analyzing network data and deciphering network protocols. It can be used to...

Free Windows

Scapy

Scapy is a powerful interactive packet manipulation program. It is able to forge or decode packets of a wide number of protocols, send them on the wire, capture them...

Free Open Source Mac Windows Linux

Ethereal

Ethereal® is used by network professionals around the world for troubleshooting, analysis, software and protocol development, and education. It has all of the...

• Discontinued

Free Open Source Windows Linux

Ostinato

Ostinato is a network packet and traffic generator and analyzer with a friendly GUI. It aims to be "Wireshark in Reverse" and thus become complementary to...

Free Open Source Mac Windows Linux

HTTPNetworkSniffer

Packet sniffer tool that captures all HTTP requests/responses sent between the Web browser and the Web server and displays them in a simple table.

Free Windows

Packetyzer

Packetyzer provides a Windows user interface for the Ethereal packet capture and dissection library. Ethereal is used by network professionals around the world for...

• Discontinued

Free Open Source Windows