System Info

How to use

1. Open the page. Everything loads automatically. No permission prompt and no install. The readouts populate the moment the page opens.
2. Read your specs. Scan the Hardware, Display, Browser and Network groups. A dash means your browser chose not to expose that field.
3. Copy the report. Hit Copy all to put the whole report on your clipboard, handy for a support ticket or a forum post.

Why test this

When you're filing a support ticket, posting on a hardware forum, or checking whether a site will run well, the first question is always 'what are you running?' Digging through OS settings for cores, GPU, and screen details is slow. This page answers it in one glance, straight from the browser that will actually run the web app or game you care about. That last part matters: a benchmark of your OS specs doesn't tell you whether hardware acceleration is even on in this browser, but the GPU string here does. If it reads as a software renderer, your browser isn't using the graphics card and pages will feel sluggish. Does your GPU play AV1 and HEVC without leaning on the CPU? Normally you'd install GPU-Z to check. The 4K60 video decode group reports it from the browser, so you can tell whether 4K streams run efficiently and stay light on a laptop battery. YouTube and Netflix push AV1 for 4K, so that codec is the one worth watching. It's also a quick privacy check: everything on this page is what any website you visit can silently read about you, with no permission prompt.

What the results mean

CPU threads is the number of logical cores the browser can use. More means smoother multitasking and faster web apps. Device memory is a coarse, privacy-rounded RAM figure (Chromium only) and caps at 8 GB even on bigger machines, so treat it as a floor. The GPU line is the real tell for performance: a real adapter name (NVIDIA, AMD, Intel, Apple) means hardware acceleration is on. A software name like 'SwiftShader' means it's off and graphics will be slow. The 4K60 video decode group shows how each codec plays. Hardware means the browser decodes it on the GPU efficiently at 4K60, so the picture stays smooth and the CPU stays cool. Software means the CPU does the work. Expect more heat and faster battery drain, and a stutter on weak chips. AV1 is the one to watch, since only newer GPUs decode it and YouTube and Netflix rely on it for 4K. Screen resolution is in CSS pixels. Multiply by the pixel ratio for true physical pixels. Connection type and downlink (Chromium only) estimate your network class, useful for diagnosing slow loads. A dash anywhere just means your browser declined to expose that field, not an error.

FAQ

Is this accurate, and does it show my real CPU and GPU?

It shows what the browser is willing to report. CPU threads (logical cores) and the GPU renderer string are usually exact. Device memory is rounded to a coarse value for privacy, and some browsers hide fields entirely.

Why does device memory or connection show a dash?

Those APIs (deviceMemory, NetworkInformation) are only implemented in Chromium-based browsers (Chrome, Edge, Opera). Firefox and Safari deliberately omit them, so you'll see a dash there.

Is any of this sent to a server?

No. Every value is read in your browser with standard JavaScript and rendered on the page. Nothing is uploaded, logged, or stored.

Why is my GPU shown as a generic name?

The GPU name comes from WebGL's debug renderer extension. Some browsers or privacy settings mask it to a generic string like 'Google SwiftShader' (a software fallback) when hardware acceleration is off.

Does it show whether my GPU decodes AV1 or HEVC?

Yes. The 4K60 video decode group probes H.264, HEVC, VP9, and AV1. Hardware means your GPU has a dedicated decoder for that codec at 4K60, so playback stays smooth and light on battery. Software means the CPU does the work, which runs hotter and slower. A dash means the codec is unsupported.

Which GPUs hardware-decode AV1 and HEVC?

HEVC plays in hardware on most cards from the past several years. AV1 is pickier. As a rule it wants an NVIDIA RTX 30 series card or newer, an AMD Radeon RX 6000 series card or newer, Intel Arc or 11th-gen and newer Intel graphics, or an Apple M3 chip or later. A few budget cards in those lines skip AV1, which is why this tool checks your actual GPU instead of trusting a spec sheet.

A codec shows Software next to it. Should I worry?

Not really. Software decode still plays the video. The CPU just does the work, so the fan spins up and a laptop drains faster, and a 4K60 stream can stutter on an older chip. Updating your GPU driver sometimes adds the missing codec, and support varies by browser, so Chrome or Edge may read Hardware where Firefox shows Software.

Why does screen resolution differ from what I set in Windows?

The screen size is in CSS pixels. Multiply by the pixel ratio to get physical pixels. A 4K display at 150% scaling reports 2560×1440 with a 1.5× ratio, for example.