What this page shows
When you open the page, your browser reads what it is allowed to tell websites about your computer and shows your PC specs at once, with nothing to install. The hardware is read on your own computer. Only two cards need our server: the IP address, because only the server you connect to sees your public address, and the speed test, because speed can only be measured by sending data back and forth. Copy results copies the whole list, ready to paste into a forum post or a support request.
Processor
Browsers report the number of threads, not the processor model. Many Intel and AMD processors run two threads on each core (Intel calls this Hyper-Threading, AMD calls it SMT), so 8 threads usually means 4 cores and 16 threads means 8 cores. Apple M-series chips run one thread per core. The architecture line tells you whether the processor is x86-64 (Intel and AMD) or ARM (Apple M-series, Snapdragon and most phones).
Memory (RAM)
Chrome, Edge and Opera round the memory size down to a power of two, which is why the page says "at least": a computer with 12 GB shows 8 GB, one with 6 GB shows 4 GB. Firefox and Safari do not report memory at all. For the exact answer to "how much RAM do I have", use the instructions below.
Graphics card
The graphics card is what browsers reveal best, so the page answers "what graphics card do I have" directly: Chrome and Edge give the exact model. An integrated card is built into the processor and uses part of the system memory; a separate card has its own video memory (VRAM), which games and video editing need. For cards we recognise, the page adds the release year and the memory sizes the model was sold with. The video lines tell you which 4K formats your computer decodes in hardware, which saves power; software decoding works as well, but loads the processor.
Display
The resolution is given in physical pixels. Scaling of 150% means everything is drawn one and a half times larger; the figure includes the browser's zoom, so set zoom to 100% (Ctrl + 0) to see the system value. The refresh rate is measured by counting the frames the browser draws each second. Show all monitors asks for permission and lists every connected screen by name, in Chrome and Edge.
Connection and speed
Your IP address is the address your connection comes from. IPv4 addresses look like 203.0.113.7; IPv6 addresses are longer and contain colons. The provider and the approximate location are derived from the address, so the city is often where your provider's network is, not your home. The speed test measures ping (the time a small message takes to go to the nearest Cloudflare data centre and back), jitter (how much that time varies, which matters for calls and online games), download and upload. Speeds are in megabits per second: 100 Mb/s is about 12.5 megabytes per second.
Performance test
The test multiplies matrices on one thread, then on all threads, and runs a calculation on the graphics card. Results are in GFLOPS, billions of floating-point operations per second. The processor test runs in JavaScript, which uses only part of the processor's power, so compare its figures between computers rather than with manufacturers' numbers. Plug a laptop in first: many laptops slow down on battery.
Questions
Why doesn't the page show my processor model?
No browser gives websites the processor name, only the number of threads. The exception is Apple computers with M1, M2 and later chips: in Chrome the graphics name is also the chip name.
Is the RAM figure exact?
No. Chrome, Edge and Opera round it down to a power of two and stop at an upper limit, so 12 GB shows as 8 GB. Firefox and Safari do not report it at all.
How does the page know my IP address?
Every website receives the address your connection comes from. Our server only sends it back to you, together with the approximate location that Cloudflare derives from it, and stores nothing.
Why is my speed lower than my internet plan?
A plan states the highest speed to your home. Wi-Fi, other devices using the connection, a busy network in the evening and the distance to the server all lower the result. For the most accurate figure, connect with a cable and run the test twice.
How much data does the speed test use?
Up to about 230 MB: up to 150 MB downloaded and up to 80 MB uploaded. On a mobile data plan, run it only when you need it.