What is hardwareConcurrency?

hardwareConcurrency reports the number of logical CPU cores available to the browser. It is used to size thread pools in Web Workers and parallelize compute-heavy tasks.

What is deviceMemory?

deviceMemory is a hint (in GB, rounded to the nearest power of 2) about the device's installed RAM. Browsers report it as a rough bucket (0.25, 0.5, 1, 2, 4, 8) to avoid fingerprinting. Not all browsers expose it.

Why might some values show as unavailable?

Some properties like deviceMemory and hardwareConcurrency are not supported in every browser or may be hidden for privacy reasons (e.g., Firefox limits fingerprinting APIs by default).

Device Info Viewer

Display navigator properties: user agent, platform, language, hardware concurrency, and more.

The Device Info Viewer reads browser navigator properties and presents them in a clean grid of info cards. You can inspect userAgent, platform, language, languages, cookieEnabled, onLine status, hardwareConcurrency (logical CPU cores), deviceMemory (RAM estimate), and maxTouchPoints — all without leaving the browser.

Reading device info...

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FAQ

What is hardwareConcurrency?: hardwareConcurrency reports the number of logical CPU cores available to the browser. It is used to size thread pools in Web Workers and parallelize compute-heavy tasks.
What is deviceMemory?: deviceMemory is a hint (in GB, rounded to the nearest power of 2) about the device's installed RAM. Browsers report it as a rough bucket (0.25, 0.5, 1, 2, 4, 8) to avoid fingerprinting. Not all browsers expose it.
Why might some values show as unavailable?: Some properties like deviceMemory and hardwareConcurrency are not supported in every browser or may be hidden for privacy reasons (e.g., Firefox limits fingerprinting APIs by default).