Is anything uploaded when I run the scan?

No. Every check runs inside your own browser and the results stay on your device. Nothing is sent anywhere unless you press the button to copy the report and send it yourself.

Can a website really check my computer's health?

Partly. A browser can measure processor and graphics speed, screen behaviour, camera, microphone, speakers and your connection, and it can read coarse hints about memory and storage. It cannot see hard drive SMART health, temperatures, fan speeds, installed software or viruses — those need a proper look at the machine.

How does the stress test detect overheating?

It loads every processor core flat out for 30 seconds and plots throughput as it goes. A machine with good cooling holds a flat line. One that is full of dust, has dried-out thermal paste or a failing fan reaches temperature partway through and visibly drops off, because the processor slows itself down to protect itself. That decline is what causes a laptop to feel fine at first and slow after a while, and the graph makes it measurable. A run shorter than 20 seconds is not long enough to judge and the tool will say so rather than guess.

Does this detect viruses?

No. No website can scan your machine for malware. If you think you have picked something up, the malware removal tools on the JbTecWiz threat board are the right starting point, or get in touch.

Scan My PC

Twenty-five checks on whatever you are reading this on — real processor, graphics, memory, storage and connection benchmarks, a 30-second overheating test, and a report you can download. Runs entirely in your browser. Sends nothing anywhere.

← Back to Tools

Twenty-five probes — including real processor, graphics, memory, storage and network benchmarks. Takes about fifteen seconds, runs entirely on this device, and the results never leave it unless you choose to send them.

Hands-on tests

These need you in the loop, so they are not part of the automatic scan. The camera and microphone tests ask permission first, show you the feed, and nothing is recorded or transmitted at any point.

Dead pixel check

Fills the screen with solid red, green, blue, white then black. A pixel that is stuck or dead shows up as a dot that stays the wrong colour. Tap or press a key to move through the colours.

Backlight & uniformity

Holds a full black screen, then a full grey one. Look for lighter patches at the edges (backlight bleed) or blotches and banding across the middle. Best done with the lights off.

Microphone

Shows a live level meter so you can see whether your mic is picking anything up, and which one the browser is actually using. Say something and watch the bar.

Camera

Opens a preview from your webcam so you can check it works, is not covered, and is the right way up. The picture stays on this page and is never saved.

Speakers

Plays a soft tone through the left channel, then the right, then both. Tells you whether one side has gone, or whether the balance is off. Turn the volume down a little first.

Stress test & overheating check

Loads every processor core flat out for 30 seconds and plots the throughput as it goes. A healthy machine holds a flat line. One that is full of dust, has dried-out thermal paste or a failing fan will climb to temperature and then visibly drop off — that decline is the thing to look for, and it is the single most common cause of a laptop that “goes slow after a while”. Your fans will spin up. Leave the tab in front for the full run.

Keyboard

Press keys and they are listed as they register. A key that never appears is either not reaching the browser or has failed. Click into the box, then type.

Your report

Everything the scan found. The downloaded report is a single self-contained file — it opens in any browser, needs no internet, and prints straight to PDF if you want to keep or forward a copy. The plain text below is the same thing for pasting into a message.

Email it to Jamie

Run the scan and your report appears here.

What this cannot see

Drive health. SMART data, reallocated sectors, a disk on its way out — none of that is visible to a browser. A failing drive can pass everything on this page. On Windows, PC Check reads it properly.
Temperatures and fans. No thermal sensors, no fan speeds, so overheating and dust build-up cannot be detected here.
Viruses and malware. No website can scan your machine. If something feels wrong, start with the malware removal tools or get in touch.
Your actual RAM and disk size. Browsers give a deliberately coarse hint and hide the rest for privacy reasons. Treat those two numbers as a ballpark, not a spec sheet.
Battery wear. The charge level is readable on some browsers; the health of the cell — how much capacity it has lost — is not exposed anywhere.
Memory layout and crash history. Which slots are filled, and what has been failing in the background over the past month. Both need to run on Windows itself rather than inside a browser sandbox.

On Windows, PC Check covers most of the above — it is a free download that reads drive health, battery wear and error history properly, and writes the same kind of report.

If the scan turns something up, or the machine is misbehaving in a way neither tool can explain, send me the report — diagnostics are £30 and I cover Taunton and the surrounding area.