Download System Ninja

System Ninja

Version 3.1.6

Clean and speed up your Windows PC by removing unnecessary files and managing startup processes

12, 007 Downloads

  • High-speed download
  • Checked for viruses
  • Free



Cat Ellis

System Ninja is a neat little optimization tool that puts all the utilities you need for regular PC housekeeping at your fingertips. Just make sure you don't accidentally delete or deactivate anything crucial to your system.

Cat Ellis


System Ninja
System Ninja
System Ninja

System Ninja is a neat little optimization utility designed to scour your PC for junk files, resulting in a faster, more stable system. It also deletes browser tracking cookies, preventing unscrupulous advertisers monitoring your online activity.

System Ninja's star feature is its Junk Cleaner, but it also includes an extended suite of system-boosting tools to further accelerate your PC's performance. Its Startup Manager lets you stop non-essential programs running when Windows starts so you reach your desktop faster, and its built-in uninstaller is a quick way to remove several programs at once.

System Ninja also includes a process manager that lets you select and end multiple processes at once, and its system information tab gives you a thorough description of your PC's hardware and software.


Why you need System Ninja

System Ninja is a worthy rival to leading system speed-up tool CCleaner thanks to its deep cleaning and array of additional optimization options.

The program uninstaller is particularly good; unlike many dedicated uninstallers, it lets you select multiple programs with a simple checkbox system and remove them all in a batch. There's no automatic deep clean afterwards, but a quick scan with the Junk Cleaner will erase any leftovers. System Ninja can highlight the software that came pre-installed on your PC – ideal for clearing out the bloatware supplied with a new computer.

Delve into System Ninja's settings and you'll find some well thought-out options for customizing its Junk Cleaner. You can select certain directories or drives to scan, or particular ones that should be excluded from a full scan.

If that's not enough, System Ninja also supports plugins to extend its already impressive feature set, including a duplicate file scanner, batch file renaming tool and Windows Service manager.



System Ninja review

System Ninja has a simple tabbed interface that suggests (but doesn't enforce) a particular workflow: start at the left with the Junk Scanner and work across to the right.

System Ninja's Junk Scanner serves a dual purpose. It removes unnecessary programs and files, but the increasing size of hard drives means this kind of clutter has less of an impact on system performance than it once did. Leftover files and cookies are, however, a potential privacy and security risk, so it's good practice to clean up after messy programs.

The System Tools tab contains the Startup Manager, App Uninstaller and Process Manager. In many ways these all mimic features and options already available in the various version of Windows, but it's handy to have them all accessible in the same place.

The PC Analysis section is very neatly laid out, and is a goldmine of information for anyone curious about their hardware, If you want to find out the model of your motherboard to check how much RAM it supports, check the exact model of your graphics card to make sure you download the right drivers, this is where to look.

System Ninja can analyze your hardware and give you a detailed report that's very useful if you're planning an upgrade and need to work out what will be compatible with your current setup.


We liked

Plugins! System Ninja is a wonderfully useful little utility in its own right, but you can easily add a host of new features thanks to support for plugins. By downloading little add-ons, you can bring a registry cleaner, services manager, file renamer, duplicate file finder, and a file analyzer to the program.

If you don't want a certain tool, you don't need to install it, and it's this customisation extendability that makes System Ninja so appealing. The process of installing the plugins could have been made a little more intuitive - it's going to be off-putting to beginners - but it's still a great option to have.

You can manage the programs that start automatically when Windows loads, but take care not to deactivate anything that might be vital to your system's stability - System Ninja won't warn you.


We disliked

While useful, System Ninja's Startup Manager has the potential to be a little dangerous for one simple reason - there is just not enough information given about startup items for many people to be able to correctly identify what they are and to determine whether they're essential. A little common sense can go a long way, but some extra guidance would have been appreciated as it would be all too easy to end up with a computer that doesn't function properly. Users are left having to search the internet for information about what particular startup items might be, when a description could have been provided easily.


Final verdict

Even if you feel that System Ninja doesn't have a great deal to offer that can't already be found in Windows, the fact that it is free and provides a handy single interface to access a wealth of tools and information works in its favor.

Having trouble downloading System Ninja? Try the 'Manual download' link underneath the green 'Free download' button. If this doesn't help, please send a description of the problem to and we'll get back to you as soon as possible.

  • High-speed download
  • Checked for viruses
  • Free

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