Input Devices
Check every key, click, and scroll to confirm your keyboard, mouse, gamepad and USB ports respond correctly.
Online Browser Diagnostic Suite • 100% Free
Free Online Hardware Testing & Diagnostic Tools
Test your keyboard, mouse, screen, webcam, microphone, speakers, battery, storage, and network with purpose-built browser tools on pctester.online, or download our standalone desktop utilities for Windows and macOS.
Clean Diagnostics
What is PC Tester?
PC Tester is a free collection of hardware diagnostic tools for laptops and desktops. Instead of one bulky program, you get focused, single-purpose testers for your keyboard, mouse, webcam, microphone, speakers, battery, screen, storage, network, and more, so you can check exactly what you need in seconds without installing anything.
Whether you are an IT technician verifying a client's machine, a buyer inspecting a used PC before purchase, a gamer checking GPU performance, or someone troubleshooting why a system feels slow, PC Tester gives you clear, real-time results in a sandbox-safe browser environment.
Last reviewed: October 2026. Built and maintained by Adeel Farooq.
Browser Suite
The Full PC Tester Suite
Pick the tool you need below. Most run instantly in your browser, and a few need a Chromium browser such as Chrome or Edge.
Display & Screen
Test resolution, dead pixels, motion blur, HDR support, calibration and touch response.
Hardware Comparisons
Compare laptops, monitors, CPUs, motherboards, and controllers side-by-side to find the right hardware.
Webcam & Video
Confirm your camera works properly and check for lag before your next video call.
System, CPU & Storage
Scan your hardware profile, benchmark CPUs, estimate thermals, and measure real storage speed.
Battery & Power
Check battery level and charging state, monitor drain rate, and find the right power adapter.
Network & Connectivity
Test Wi-Fi, Bluetooth, DNS leaks, and overall connection quality and congestion.
Browser & Privacy
Check what your browser exposes and how secure your current session really is.
Gaming Performance
Check compatibility, stress-test your GPU, and benchmark your rig against modern games.
Audio System
Verify speakers, microphone input, and audio quality with dedicated analysis tools.
Desktop Applications & Standalone Software
Download PC Tester Desktop Software
Need offline diagnostics, deeper sensor audits, or advanced stress testing? Download our desktop tools for Windows and macOS.
Software Integrity & Source Transparency
Applications published on PC Tester are compiled independently by Adeel Farooq. After downloading, confirm the file with certutil -hashfile app.exe SHA256 on Windows or shasum -a 256 app.dmg on macOS, and compare it with the checksum published for that app.
Security disclosures and build queries: [email protected]. Read about the author and our standards on the About page. See also our Privacy Policy and Contact page.
System Analyser
System Analyser / PC-Tester Online Pro desktop app for comprehensive hardware monitoring.
- OS
- Windows, macOS
- Version
- 2.4.1
System Diagnostics
Complete hardware testing suite to diagnose performance bottlenecks and hardware health.
- OS
- Windows, macOS
- Version
- 1.9.0
PCScreen Pro
Monitor diagnostic and repair suite for Windows and Mac to test and fix display anomalies.
- OS
- Windows, macOS
- Version
- 3.1.2
Easy Download Manager
Fast multi-connection file downloader to download files and software effortlessly.
- OS
- Windows, macOS
- Version
- 2.0.4
Windows Hardware Diagnostic
Audit PC components, test sensors, and resolve system failures with Titan Diagnostic.
- OS
- Windows 10/11
- Version
- 1.5.0
SSD/HDD Health Tester
Evaluate disk lifetime expectancy and spot storage problems with Storage Drive Tester-Pro.
- OS
- Windows, macOS
- Version
- 2.2.0
VRAM Calculator
Calculate system details, graphics VRAM requirements, and memory allocation.
- OS
- Windows, macOS
- Version
- 1.1.8
All Desktop Software
Browse the complete catalog of desktop applications, installer packages, and release notes.
Streamlined Workflow
How PC Tester Works
Follow 4 easy steps to diagnose a computer in your browser.
Pick a Tool
Choose the test you need from the suite above, or browse the full directory.
Open in Browser
Most tests need no install and run in Chrome, Edge, Firefox or Safari. A few need a Chromium browser.
Run the Test
Follow the on-screen prompts. Most tests take under a minute.
Get Results
See clear, real-time results with recommendations for what to check next.
Quick Fixes
Which Tool Should I Use?
Start from the symptom. Each shortcut opens the test most likely to find the cause.
- My keys are not registering or double-typingKeyboard Tester Pro
- My screen has dead pixels, flicker or burn-inScreen TestPixel Fixer
- I am buying a used laptop or PCUsed Laptop Inspection SuiteFake USB Verifier
- My battery drains too fastBattery TesterBattery Drain Test
- My Wi-Fi drops or lagsWiFi TesterNetwork Congestion Tester
- My laptop runs hot or the fan is loudLaptop Fan NoiseCPU Temperature Monitor
- A game will not run wellGame CompatibilityCan I Run It?GPU Stress Test
- My controller driftsGamepad TesterStick Drift Guide
Why PC Tester
Why Choose PC Tester?
Modern hardware diagnostics made accessible without cost or complexity.
Instant Results
Get hardware analysis right away, without waiting for downloads or installs.
Runs in Your Browser
Most tests run client-side with standard browser APIs. Anything you download or share is your choice.
Completely Free
Full-featured testing tools with no subscriptions or paywalled features.
Cross-Platform
Works on Windows, Mac, Linux, and mobile through a modern web browser.
Target Audience
Perfect For
Diagnostic tools for technicians, buyers, students, and everyday computer users.
IT Professionals
Quick hardware diagnostics for client computers, system health checks, and performance troubleshooting.
Home Users
Monitor laptop performance, check system health, and spot hardware issues before they become problems.
Computer Buyers
Verify specifications and performance of a used laptop or PC before you buy.
Gamers
Test GPU performance, check game compatibility, and benchmark your rig against current requirements.
Business Users
Make sure company laptops meet performance standards and find systems needing upgrades or maintenance.
Students
Check if a laptop meets software requirements for coursework and find performance bottlenecks.
Hardware Knowledge
Guides & Comparisons
Practical guides to help you understand and fix common PC problems.
Why Is My PC Overheating?
12 causes, fixes, and a thermal paste guide for solving thermal throttling.
Keyboard Ghosting vs. NKRO
What "anti-ghosting" and N-Key Rollover actually mean for typing and gaming.
Mouse Polling Rate vs. DPI
What those marketing numbers actually mean for performance.
How to Fix Stick Drift (PS5 & Xbox)
Diagnose and fix controller stick drift using the live controller tester.
MacBook vs. Windows in 2026
An up-to-date comparison for anyone weighing their next laptop purchase.
How to Monitor CPU, GPU & FPS
A practical guide to tracking your system's real-time performance stats.
Common Queries
Frequently Asked Questions
Common questions about testing computer hardware in your browser.
Is PC Tester safe to use?
Yes. The browser tools use standard web APIs and nothing is installed on your device. Most tests run client-side, while network tools such as IP lookup, DNS leak and connection tests contact servers to work.
Do I need to install any software?
No. Every browser tool runs from its page, with no download required. Separate desktop apps are available for offline or deeper diagnostics, but they are optional.
How accurate are the test results?
The tools use standard browser APIs and are reliable for spotting real problems and comparing systems. Browsers are sandboxed, so they cannot match native diagnostic software. Values such as CPU temperature are estimates.
Which browsers are supported?
Chrome, Edge, Firefox, and Safari work for most tools. Features such as WebUSB, Web Bluetooth and battery status are available mainly in Chromium-based browsers like Chrome and Edge. Use the latest browser version for best results.
Can I save or share my test results?
Yes. Several tools let you download results, for example as JSON or a summary report, for documentation, troubleshooting, or comparing systems over time.
Does it work on mobile devices?
Most tools work on smartphones and tablets. A few tests rely on desktop browser features and may not be available on mobile.
How do I verify a desktop app download?
Run certutil -hashfile app.exe SHA256 on Windows or shasum -a 256 app.dmg on macOS, then compare the result with the checksum published for that app.