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Find what’s using the port.Instantly. No terminal required.what process is using port Windows

Your dev server won’t start. Something is already on port 3000, 8080, or 5432. Port Detective shows you exactly which process owns any port on your Windows machine—with auto-tagged labels for Vite, React, Postgres, MySQL, and dozens more.

$4.99 USD — Perpetual License

One-time purchase · Lifetime updates · Delivered via the Microsoft Store

Get PortDetective on Microsoft Store

Purchased and updated securely through the Microsoft Store. No account needed on our site, no subscription, and a Microsoft receipt for easy corporate expensing.

Full PortDetective overview
One-time purchase No telemetry Local-first

windows-only · one-time purchase · no data collection

If this sounds like your week

You just want to start your dev server.

You open your project, run the start command, and get an error. The port is taken. Now instead of writing code, you are debugging your operating system. Which process is it? Is it a leftover from your last session? A background service? Another project you forgot to stop? On Windows, answering this question means opening PowerShell and running commands most developers have to look up every single time.

Where tooling usually breaks

The answer is always five clicks and two commands away.

Task Manager does not show ports. Resource Monitor shows ports but is buried in the Performance tab behind two extra clicks, and its interface was designed for IT ops, not developers. netstat works but gives you PIDs instead of process names. Every path to the answer requires multiple steps, context switching, and translating between identifiers. Meanwhile, your hot reload is waiting, your terminal is blocked, and your momentum is gone. This happens multiple times per week for most developers working on more than one project.

Where PortDetective lands

Known Ports: your dev stack, auto-identified.

Port Detective’s Known Ports dictionary automatically recognizes and labels common development tools. Port 3000 shows "Vite / React Dev Server." Port 5432 shows "PostgreSQL." Port 6379 shows "Redis." You do not need to memorize port numbers or cross-reference PIDs—the app tells you what is running in plain language. Open Port Detective, glance at the table, and know exactly what is using every port on your machine. Time from launch to answer: under two seconds.

$4.99 USD — Perpetual License

One-time purchase · Lifetime updates · Delivered via the Microsoft Store

Get PortDetective on Microsoft Store

Purchased and updated securely through the Microsoft Store. No account needed on our site, no subscription, and a Microsoft receipt for easy corporate expensing.

Learn more about Port Detective

windows-only · one-time purchase · no data collection

What you get

Feature highlights

Quick port visibility for local and staged environments

Quick port visibility for local and staged environments

Clear status output designed for rapid troubleshooting

Clear status output designed for rapid troubleshooting

Privacy-focused workflow with no account requirement

Privacy-focused workflow with no account requirement

Especially when

  • Find what process is using a port on Windows before you kill the wrong service
  • Resolve EADDRINUSE and listening-port conflicts without juggling netstat, tasklist, Task Manager, and Resource Monitor
  • Check local or remote TCP ports quickly during developer and IT troubleshooting

Trusted by pragmatic desktop users

Built for people who prefer tools that stay local.

Real workflows: focus timers that stay visible, batches that never leave the disk, and renames you can rewind.

Customer review 01

PinPoint: Always On Top saves me so much time as I can organize all my report materials without having to flip between windows or tabs. I love the fact that it is straightforward and simple.

Senior Accountant · Manufacturing Company · United States · PinPoint

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Customer review 02

I used to get so frustrated when my Taskbar would freeze and disappear. Taskbar Sentinel has eliminated that pain without subjecting me to another subscription.

Darren · Calgary, Alberta, Canada · Taskbar Sentinel

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Customer review 03

OpticBatch and MetaForge are a lifesaver for me as a person with a passion for photography. They give me the ability to stay organized and keep personal information confidential when I post pictures online.

Sherri · United States · OpticBatch & MetaForge

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Publisher Featured & Indexed On

OpenHunts Club Member Featured on IndieHunt

Our Core Moat

Engineered to respect your system boundaries.

System Resource Monitor (Idle State Comparison)
Automata Labs sub-5MB idle memory footprint compared to generic Electron applications

Lightweight Native Stack

Compiled Rust core wrapped inside an optimized Tauri shell. No heavy background node loops or duplicate Chromium engines cooking your memory footprint (<5MB idle RAM).

100% Local-First Privacy

Executes entirely on-device with full offline isolation. Absolute zero background telemetry policies, no metrics aggregation, and zero mandatory cloud-sync accounts.

Perpetual Fallback Licenses

Pay a single, clear one-time purchase price. Own your specific native software utility execution tier permanently without artificial subscription paywalls or ongoing usage tax.

FAQ

Straight answers—no glossary dump

How do I check what process is using a port on Windows?

You can use "netstat -ano | findstr :PORT" in PowerShell and then "tasklist /FI PID eq <number>" to identify the process. Port Detective provides a faster alternative: open the app, type the port number, and instantly see the process name, path, and PID in a searchable table.

What is using port 8080 on my Windows machine?

Port 8080 is commonly used by web servers, API backends, and development proxies. Tools like Spring Boot, Tomcat, and various Node.js frameworks default to 8080. Port Detective's Known Ports feature auto-identifies the specific tool using the port so you don't have to guess.

What is using port 3000 on Windows?

Port 3000 is the default for many JavaScript development servers including React (Create React App), Vite, Next.js, Express, and Ruby on Rails. If your dev server can't start on port 3000, a previous instance likely didn't shut down cleanly.

Why can't Task Manager show which ports a process is using?

Task Manager is designed for process and performance monitoring, not network diagnostics. It shows CPU, memory, and disk usage per process but does not include network socket information. Resource Monitor (resmon.exe) has a Network tab with port info, but it is not optimized for quick port lookups.

What ports do common dev tools use?

Common defaults: React/Vite (3000 or 5173), Next.js (3000), Express (3000), Angular (4200), Django (8000), Spring Boot (8080), PostgreSQL (5432), MySQL (3306), Redis (6379), MongoDB (27017). Port Detective's Known Ports dictionary includes these and many more, auto-labeling them in the interface.

Related pages

Kill the right process. Not the one that recycled its PID. Fix EADDRINUSE on Windows—without touching netstat. A modern alternative to TCPView, built for today’s developer workflow. The GUI that replaces netstat -ano | findstr.

Stop debugging your OS.
Start shipping your code.

PortDetective is a one-time purchase. No subscriptions, no telemetry, no ads. Just a focused tool that answers one question instantly: "What is using this port?"

$4.99 USD — Perpetual License

One-time purchase · Lifetime updates · Delivered via the Microsoft Store

Get PortDetective on Microsoft Store

Purchased and updated securely through the Microsoft Store. No account needed on our site, no subscription, and a Microsoft receipt for easy corporate expensing.

Open full product page

Technical specifications

Technical specifications for procurement

Spec Implementation
Data Sovereignty Port scan results stay on workstation; no cloud dashboard
Telemetry Status None
Core Runtime Native Windows desktop utility
Network Requirements Local scans offline; remote host checks use direct TCP probes (no third-party relay)
Deployment Compatibility Windows 10 and 11; direct purchase
Use case Local and staged-environment port visibility for developers and IT