Hardware diagnostics that
don't
Test your laptop or PC hardware free in your browser — screen, dead pixels, keyboard, webcam, mic and more. No download, no sign-up, instant PDF report.
Display — Dead Pixels & Backlight
Look at each color carefully...
Checklist Complete
Here's your diagnostic summary
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23 Diagnostic Tests
Every tool runs entirely in your browser — no installs, no data leaves your machine.
Cycle solid colors to find dead, stuck, and hot pixels.
Uniformity, backlight bleed, color banding, and sharpness checks.
Measure your display refresh rate and rendered frame rate.
Check for motion blur, ghosting, and response-time artifacts.
Check your display color depth, gamut, and HDR support.
See every key register in real time. Spot dead, sticky, or ghosting keys.
Check clicks, scroll, movement, and double-click misfires.
Measure your mouse polling rate estimated DPI sensitivity.
Know exactly what you're buying
Buying a used laptop is a gamble — unless you test it first. TestMyLaptop runs every critical hardware check in your browser, guides you step by step, and produces a clear PDF report you can use to negotiate or walk away. No downloads, no sign-ups, no tricks.
How It Works
Open a test
No app store, no installer — every tool runs right in your browser tab.
Follow the steps
Clear instructions guide you through each check. Real measurements and estimates are clearly labeled.
Get your report
Download a PDF summary of what passed, what needs attention, and any notes you added.
How to Test a Laptop Online with TestMyLaptop
TestMyLaptop is the most thorough browser-based diagnostic suite available. Every test is clearly labeled as a real measurement or an estimate, so you know exactly what you're looking at. Run the full checklist in under 20 minutes and get a printable PDF report with all findings and your notes.
Blog
Plain-English guides to diagnosing and fixing common hardware problems.
2026-07-06
Buying a Secondhand MacBook? Here's Exactly What to Check First
A focused guide to testing a used MacBook — battery cycle count, keyboard reliability, USB-C ports, screen, and signs of liquid damage. Covers butterfly-era models specifically.
2026-07-06
Facebook Marketplace Laptop Scams: Red Flags to Test For in Person
How to protect yourself when buying a used laptop on Facebook Marketplace — red flags before testing, a 10-minute in-person test routine, and payment safety tips.
2026-07-06
How to Inspect a Used Gaming Laptop Before Buying
Check refresh rate, ghosting, battery health, keyboard ghosting, and ports on a used gaming laptop. A focused inspection guide for gaming-specific hardware.
2026-07-06
Refurbished Laptop vs Used Laptop: What to Verify Before Paying
What 'refurbished' actually means, when it's worth the premium, and what to check yourself regardless of the label — battery, screen, keyboard, and ports.
2026-07-06
The Complete Used Laptop Checklist: 15 Things to Test Before You Buy
A 15-point checklist for testing a used laptop before buying — battery, screen, keyboard, webcam, network, and more. Takes 10-15 minutes with free browser tools.
2026-06-23
Dead Pixels vs. Stuck Pixels: Differences, Causes, and Fixes
A bright speck on your screen could be a dead pixel or a stuck pixel. They look similar but one is often fixable.
Your data never leaves this device
All tests run entirely in your browser. No server uploads, no account required, no tracking. The PDF report is generated locally — nothing is sent anywhere. We don't collect, store, or even see your diagnostic results.
No data collection
Zero analytics, zero cookies, zero tracking. Everything runs client-side.
Local reports
PDF reports are generated right in your browser tab — no server touch.
No sign-up
Just open the tool and start testing. No email, no password, no paywall.
Ready to Test Your Laptop?
Run the full diagnostic checklist right now — it takes 15-20 minutes and could save you hundreds on a bad purchase.
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