Introducing IO Ninja

IO Ninja is a professional, scriptable, multi-purpose terminal emulator, network sniffer and IO monitor.

It is aimed at network security experts, system administrators, and all kinds of software/hardware/embedded developers.

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IO Ninja 3.8.4 is out!

This release introduces the following new features:

  • Serial Tap Cable monitoring plugin

    IO Ninja can now be used with serial tap cables such as EZ-Tap from Stratus Engineering Inc.

  • Streaming mode in Tibbo Device Monitor for improved performance & scalability

    With streaming mode it's possible to simultaneously pass multiple buffers to the kernel device filter driver, thus increasing overall throughput. Low-level details such as parallelism, buffer sizes, pending queue limits, etc — are all configurable!

  • All the Tibbo Device Monitor-based plugins have been re-written using the generic io.DeviceMonitor class

    Check the sources of Serial Monitor or Named Pipe Monitor to see how to process and log serial-specific or NPFS-specific IOCTLs — then extend those or roll out your own new device monitoring plugins for Windows and Linux!

  • Detection and workarounds for buggy USB-to-serial drivers

    Certain serial drivers just... do not play nice — some can't handle simultaneous read IRPs, some don't process COMMTIMEOUTS properly, etc. IO Ninja falls back to conservative (although slightly less performant) settings when it detects an unreliable driver.

  • Lots of BUGFIXes and other improvements -- as usual!
  • For a full list of changes see changelog.txt (also included in all installation packages).

Download IO Ninja 3.8.4


IPv6 is slowly but steadily taking over the Internet. IO Ninja is here to help testing IPv6-connectivity of your products.

No more question marks: IO Ninja can show and send characters in any Unicode encoding.

IO Ninja is powered by our innovative programming language Jancy tailor-made for IO and UI programming.

Need a non-standard network protocol analyzer, a device emulator or an IO testing utility? IO Ninja can be programmed to do the job.

IO Ninja comes with a convenient IDE and that means it's not only possible to customize it — it's fun (if you're a nerd, that is).

IO Ninja's advanced logging engine shows massive logs in a clean, easy-to-read way. It'll gracefully display informational text messages side-by-side with binary data blocks in either hex view or plain text representations.

IO Ninja supports ANSI & X-Term terminal emulation; switch between log view and terminal console any time you want.

IO Ninja provides a powerful and elegant way of redirecting data from any transport to any other transport with Session Linking. Think Unix pipes, but better.

Write protocol analyzers or emulators, testing applications, and other utilities to extend existing sessions.

IO Ninja has excellent support for binary data transmission.

Need a low-level IO terminal tool to send binary data over TCP? Or send hex to serial port? Ninja would be the best tool for binary packets transmission.

IO Ninja is not freeware. If you keep using it, you have to purchase a license.

Unlike many shareware products, however, IO Ninja will not impose any functionality limitations during the evaluation period. We grant you the right to evaluate a fully-functional copy of IO Ninja as long as you need.