CPU Test Online
Run a real 3-second CPU benchmark in your browser and see logical cores, approximate memory and operations per second — no install.
How to use this test
Press the benchmark button and keep the tab in the foreground for 3 seconds while the workload runs. Compare repeated runs on the same device, browser and power mode.
How the measurement works
The benchmark runs a chunked single-threaded JavaScript workload and divides completed operations by elapsed time to report operations per second, alongside logical core count and approximate device memory.
How to interpret results
Operations per second compare browsers, power modes and devices — they are not a CPU model score. A plugged-in laptop usually scores higher than the same machine on battery saver.
Troubleshooting tips
Close heavy tabs, plug in the laptop, disable battery saver and repeat the run. A much lower score in a background tab is browser throttling, not a failing CPU.
Related tests
You can also browse every utility from the complete tool index.
Common cpu questions
How can I test my CPU speed online without installing anything?
Open the CPU test, run the 3-second browser benchmark and compare the operations-per-second result across runs. It measures browser compute throughput and also shows logical core count and approximate device memory.
Read full answer →Why is my laptop slow even though the CPU test looks fine?
A browser benchmark only measures short compute bursts. Slow everyday use is often caused by a full disk, low memory, background apps, thermal throttling or a slow storage drive rather than raw CPU speed.
Read full answer →CPU benchmark vs CPU model: what is the difference?
A benchmark measures how fast work completes; a model name identifies the chip. Browsers do not expose the CPU model, so this site reports measured throughput instead of a model number.
Read full answer →What is a good CPU benchmark score here?
There is no universal pass score because the result is browser JavaScript throughput, not a hardware model rating. Compare repeated runs on the same device, browser and power mode instead of comparing unrelated machines.
Read full answer →