Input Devices
Check every key, click, and scroll to confirm your peripherals respond correctly.
Online Browser Diagnostic Suite • 100% Free
Free Online Hardware Testing & Diagnostic Tools
Test your keyboard, mouse, screen, webcam, mic, speakers, battery, storage, and network with dozens of purpose-built, zero-install tools on pctester.online, or download our standalone software utilities.
No Downloads
Runs In Browser
Instant Results
100% Free
Clean Diagnostics
What is PC Tester?
PC Tester is a free collection of hardware diagnostic tools for laptops and desktops. Rather than one bulky program to download, you get dozens of 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, with no installation required.
Whether you're 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 their system feels slow, PC Tester gives you real-time, sandbox-safe results.
Browser Suite
The Full PC Tester Suite
Every tool below runs instantly in your browser. Pick the one you need, or run a full system check.
Display & Screen
Test resolution, refresh rate, dead pixels, motion blur, HDR support, and touch response.
Hardware Comparisons
Compare laptops, monitors, CPUs, 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 full hardware profile, benchmark CPUs, monitor thermals, and measure real storage speed.
Battery & Power
Check battery health, monitor drain rate, and find the right power adapter for your laptop.
Network & Connectivity
Test WiFi, 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 full audio quality with dedicated analysis tools.
Desktop Applications & Standalone Software
Download PC Tester Desktop Software
Need offline diagnostics, deep hardware sensors auditing, or advanced stress testing? Download our dedicated desktop software tools for Windows and macOS.
Software Integrity & Source Transparency
Applications published on PC Tester are compiled independently by Adeel Farooq. Checksums can be confirmed locally after downloading by running certutil -hashfile app.exe SHA256 on Windows or shasum -a 256 app.dmg on macOS.
Security disclosures and build queries can be directed to [email protected]. Review our development guidelines on our editorial standards page.
System Analyser
System Analyser Software / PC-Tester Online Pro Desktop App for comprehensive hardware monitoring.
System Diagnostics
Complete testing hardware suite to diagnose performance bottlenecks and hardware health.
PCScreen Pro
Monitor Diagnostic & Repair Suite for Windows and Mac to test and fix display anomalies.
Easy Download Manager
Fast multi-connection file downloader utility to download files and software effortlessly.
Windows Hardware Diagnostic
Auditing PC Components, Testing Sensors, and Resolving System Failures with Titan Diagnostic.
SSD/HDD Health Tester
Evaluating disk lifetime expectancy, and resolving memory bottlenecks using Storage Drive Tester-Pro.
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 any computer instantly in your browser.
Pick a Tool
Choose the specific test you need from the suite above, or browse the full directory.
Open in Browser
No downloads or installs — every test runs instantly in Chrome, Firefox, Safari, or Edge.
Run the Test
Follow the on-screen prompts — most tests take under a minute to complete.
Get Results
See clear, real-time results with recommendations for what to check next.
Why PC Tester
Why Choose PC Tester?
Modern hardware diagnostics made accessible to everyone without cost or complexity.
Instant Results
Get immediate hardware analysis without waiting for software downloads or installations.
Runs Locally
Most tests run entirely in your browser. Anything you choose to download or share is your call, never automatic.
Completely Free
Full-featured hardware testing tools with no hidden costs, subscriptions, or premium features.
Cross-Platform
Works on Windows, Mac, Linux, and mobile devices through any modern web browser.
Target Audience
Perfect For
Diagnostic tools crafted 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 identify potential hardware issues before they become problems.
Computer Buyers
Verify hardware specifications and performance of a used laptop or PC before making a purchasing decision.
Gamers
Test GPU performance, check game compatibility, and benchmark your rig against current requirements.
Business Users
Ensure company laptops meet performance standards and identify systems requiring upgrades or maintenance.
Students
Check if a laptop meets software requirements for coursework and identify performance bottlenecks.
Hardware Knowledge
Guides & Comparisons
Beyond testing, PC Tester publishes 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 your typing and gaming.
Mouse Polling Rate vs. DPI
Understanding 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 safely in your browser.
Is PC Tester safe to use?
Yes. PC Tester's tools are built using standard browser APIs — nothing is installed on your device, and most tests run entirely client-side in your browser.
Do I need to install any software?
No. Every tool in the PC Tester suite runs directly in your browser. Just open the tool you need and start testing — no downloads required. (A separate desktop app is also available if you'd prefer it, but it's optional.)
How accurate are the test results?
Our tools use standard browser APIs to deliver results that closely match real hardware behavior. Browser-based testing can't always match the precision of native desktop diagnostic software due to sandboxing limits, but our results are reliable for spotting real problems and comparing systems.
Can I save or share my test results?
Yes — several tools let you download your results (for example as JSON or a summary report) so you can keep them for documentation, troubleshooting, or comparing systems over time.
Which browsers are supported?
PC Tester works with Chrome, Firefox, Safari, and Edge. For best results, use the latest version of your browser.
Does it work on mobile devices?
Yes, most tools work on smartphones and tablets. A few tests rely on desktop browser features and may not be available on mobile.