System Informer

Name: System Informer
Brand: System Informer

Free, open-source Windows tool for monitoring resources and detecting malware

softwareSystem Monitorssystem monitortask manageropen source

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Our Verdict

Best for

Windows users who want deep, real-time process and system visibility beyond Task Manager

Skip if

You need a cross-platform monitor or a simpler, less technical interface

What is System Informer?

System Informer (the successor to Process Hacker) is a free, open-source system monitor for Windows that shows real-time performance graphs, per-process resource usage, and detailed statistics. It exposes low-level detail like file handles, loaded DLLs, active network connections, disk activity, and GPU usage for each running process. Built for debugging software and detecting malware, it supports kernel-mode stack traces, WOW64 process inspection, and direct service management alongside services.msc integration. The project is maintained by Winsider Seminars and Solutions with support from JetBrains, and offers both light and dark themes plus community support via Discord and GitHub.

SpecificationsAI-estimated

deploymentDesktop App

open source✅ Yes

Key Features of System Informer

Real-time graphs for CPU, memory, disk, and network performance

Per-process resource monitoring with detailed statistics

Search for open file handles and loaded DLLs across running processes

Visibility into active network connections tied to specific processes

GPU usage tracking alongside traditional CPU and memory metrics

Kernel-mode stack traces and WOW64 support for deep debugging

Service creation and management integrated with services.msc

Light and dark theme support with an active Discord and GitHub community

Use Cases for System Informer

Diagnosing resource hogs

Identify which process is consuming excessive CPU, memory, disk, or network resources.

Malware investigation

Inspect suspicious processes, their handles, and network connections to spot malicious behavior.

Software debugging

Use kernel-mode stack traces and DLL search to troubleshoot misbehaving applications.

Service management

Create, stop, or reconfigure Windows services directly from the tool.

Pros & Cons of System Informer

Pros

Completely free and open source with a transparent, auditable codebase
Exposes far more low-level detail than the built-in Windows Task Manager
Actively maintained with JetBrains-backed support
Useful for both everyday monitoring and serious malware/debugging work

Cons

Windows-only, no Mac or Linux support
Depth of detail can be overwhelming for casual users
Kernel-mode features require administrator privileges

Frequently Asked Questions

Is System Informer free?

Yes, it is completely free and open source.

Is System Informer the same as Process Hacker?

Yes, System Informer is the continuation of the Process Hacker project.

Does it work on Mac or Linux?

No, it is Windows-only.

Can it help detect malware?

Yes, it exposes low-level process, handle, and network detail commonly used to spot malicious behavior.

Pricing Overview

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Free

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