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Keyboard Test
Test keyboard keys, inspect repeated inputs and review a local test summary. Get clear…
CPU Speed Test
Runs four short single-core workloads — integer, floating point, string and sort — and reports a comparative score.
Device Tests
Nothing uploaded
No sign-up
Free, unlimited
The test starts automatically — follow the prompts above.
In short
CPU Speed Test is a free online tool on inputtesthub.com that runs four short single-core workloads — integer, floating point, string and sort — and reports a comparative score. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.
How to use the CPU Speed Test
- The test starts on its own — no button to press and nothing to install.
- Follow the prompt in the test panel and watch the readings update live.
- Press Reset to start over with a clean slate.
About the CPU Speed Test
The CPU Speed Test runs four short single-core workloads — integer, floating point, string and sort — and reports a comparative score. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Comparing a machine before and after closing heavy background tabs.
- Checking whether thermal throttling is affecting a laptop.
- Comparing two browsers on the same computer.
Where this tool stops
A JavaScript benchmark measures the browser as much as the processor. It is not a substitute for a native benchmark such as Cinebench or Geekbench.
Frequently asked questions
Can I compare my score against someone else's?
Not usefully. The result depends heavily on the browser and its JavaScript engine, so the same machine scores differently in Chrome and Safari. Use it to compare two runs on the same setup.
Does this use all my cores?
No — it is deliberately single-threaded, so it measures per-core speed rather than total throughput.
Do I need an account to use the CPU Speed Test?
No charge and no sign-up. There is no free tier to run out of because there is no paid tier — inputtesthub.com is funded by advertising rather than by metering the tool.
Can you see what I put into this tool?
No. The CPU Speed Test runs entirely in your browser using JavaScript. Because the work happens locally, the tool also keeps working if your connection drops, and closing the tab is all it takes to discard everything.
What problem does the CPU Speed Test solve?
In practice it gets used for three things: comparing a machine before and after closing heavy background tabs. Checking whether thermal throttling is affecting a laptop. Comparing two browsers on the same computer. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is there anything the CPU Speed Test cannot do?
A JavaScript benchmark measures the browser as much as the processor. It is not a substitute for a native benchmark such as Cinebench or Geekbench. Knowing where a tool stops being trustworthy matters more than the cases where it works.
Why does the test start on its own?
No installation, no extension and no driver. The CPU Speed Test uses the browser's own device APIs and begins as soon as the page loads, so there is nothing to press first. Press Reset at any point to start over with a clean slate.
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