Steam Deck Browser & System Capability Test

Free browser test for the Steam Deck and any other handheld with a Chromium browser. Reports GPU, RAM, screen and battery, then probes WebGPU, WebGL2, WebAssembly SIMD, SharedArrayBuffer, WebCodecs, Web HID, OPFS and the full audio/video codec matrix. Includes a 3-second render benchmark for FPS and jank.

How to use

1
Open in your Steam Deck browser

In Desktop mode, launch Chrome or Firefox via the Discover store, then visit this page. The detection is automatic.

2
Read the platform card

A green card means SteamOS detected. Otherwise the report shows generic browser capabilities — still useful for comparison.

3
Run the render benchmark

Click Start to run a 3-second canvas test. Aim for FPS above 50 and jank below 5% on a healthy Deck.

4
Copy or share the report

Click Copy report to put a plain-text summary on your clipboard, ready for forum posts or repair tickets.

See what runs in your Steam Deck browser before installing

🎮

Detecting platform…

Reading user agent and hardware hints.

System

User agent— GPU— Memory hint— CPU cores— Screen— Device pixel ratio— Battery— Connection—

Browser features

WebGL2—— WebGPU—— WebAssembly SIMD—— SharedArrayBuffer—— WebCodecs—— OffscreenCanvas—— Web HID—— Gamepad API—— OPFS—— MediaSource——

Audio & video codecs

Tests every common audio and video codec via MediaSource and HTMLMediaElement.canPlayType. Useful for diagnosing why a video won't play in the Steam Deck browser.

Render benchmark

Three-second canvas render test — 1500 random rectangles per frame. Reports average FPS and percentage of janky (>33ms) frames.

—
Average FPS
—
Janky frames

Features

Steam Deck auto-detection Browser feature matrix Codec compatibility Render FPS benchmark

FAQ

Does it work in Game Mode on the Deck?

Game Mode does not include a usable browser. Switch to Desktop mode (Steam menu → Power → Switch to Desktop) and use Chromium-based browsers from Discover.

Why does the GPU say "ANGLE"?

WebGL exposes a translation layer name (ANGLE on Chromium) instead of the actual hardware. The reported string still indicates the underlying GPU family in most cases.

How accurate is the FPS benchmark?

The benchmark is a stress test of canvas 2D fill operations. It correlates with web-game performance, not native game FPS. Use it to compare browser-tab performance over time, not to predict native game frame rates.

Is WebGPU supposed to work on Steam Deck?

It depends on Mesa version and Chromium build. Recent SteamOS releases have working WebGPU; older builds fall back to WebGL2. The pill above is authoritative.

Why does the report say I'm not a Steam Deck?

Steam Deck does not always brand itself in the user agent. We use a 1280×800 + Linux x86_64 + Chrome heuristic; if that misfires, the page still reports correct browser capabilities.

💡 Want us to improve this tool just for you?

We can — and it's free! Just send us a quick message with your idea. If you'd like to discuss it in detail, leave your email and we'll get back to you. You can stay anonymous.

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Who is this tool for?
🎮 Gamers 💻 Developers & IT Pros
Published Updated