How to test GPU performance in a browser
Run a free browser GPU test, understand its score and compare results fairly. Learn what to check if graphics performance seems low.
Your computer feels slow in a game or graphics app, and you want to know whether the GPU is holding it back. A browser test can give you a repeatable check without installing benchmark software, but it measures browser graphics work, not every part of gaming performance.
The Graphics Test measures shading power and fill rate at 1080p, then gives the result a score out of 100. Use it to check whether performance changes after a setting change, or to compare the same computer under similar conditions.
Run the GPU test
- Open the Graphics Test in the browser you want to check.
- Close games, video editors, and other graphics-heavy programs. Keep the browser open, but close extra tabs that are playing video or running animations.
- Start the test using the control shown in the tool. Leave the page in front and avoid switching apps until it finishes.
- Note the score and the shading and fill rate results. If you are comparing a change, repeat the test under the same conditions.
On a laptop, connect the charger before testing. Performance can be lower on battery, especially when a power-saving mode is active. Give the computer a few minutes to cool if it has just been running a demanding game or app.
What the result means
The test shows a score and graphics measurements
The score out of 100 summarizes this test's result. Shading power and fill rate describe different parts of drawing graphics at 1080p. They help you compare repeat runs, but they are not a universal rating of every GPU or a prediction of the frame rate in a particular game.
The score changes between runs
A modest change can happen when background tasks, temperature, power settings, or browser activity differ. Close other demanding apps, keep the laptop plugged in, and run the test again. A large, repeatable drop after changing a setting is more useful than a single score.
The score seems low
There is no single pass mark that applies to every computer. The result depends on the graphics hardware, browser, drivers, and system conditions. Compare your own runs on the same device first. If the browser test is consistently slow and games or graphics apps also perform poorly, check the fixes below.
How to improve a low or inconsistent result
- Repeat the test under steady conditions. Plug in the laptop, close games and video apps, and wait for the computer to cool. Run the test two or three times without changing settings, then compare the results.
- Turn on browser graphics acceleration. In Chrome, open Settings › System and enable Use graphics acceleration when available. In Edge, open Settings › System and performance and enable the same setting. These browser menus are in the same place on Windows 11 and macOS. Restart the browser after changing the setting.
- Use a performance power mode. On Windows 11, open Settings › System › Power & battery › Power mode and select a performance-focused option if available. On a Mac laptop, open System Settings › Battery and check whether Low Power Mode is on. Retest with the computer connected to power.
- Check which GPU the browser uses. On Windows 11 with both integrated and dedicated graphics, open Settings › System › Display › Graphics, select your browser, choose Options, and pick High performance if that choice is available. Restart the browser and test again. This option does not appear on every computer.
- Update the browser and system. Install browser updates and restart it. On Windows 11, check Settings › Windows Update for updates. On macOS, open System Settings › General › Software Update. Graphics driver updates on Windows may also be available from the computer or graphics card maker.
When the GPU may need service
A low browser score alone does not prove that the graphics card is broken. Look for other symptoms too, such as repeated visual artifacts, crashes in several graphics apps, or performance that stays unusually poor after updates and a restart. If those problems occur in multiple apps, check the computer maker's support and warranty options. A desktop graphics card may be repairable or replaceable, while a laptop GPU is often part of the main board and needs professional service.
Why a browser test may differ from a game
A browser runs graphics through its own rendering system and the operating system's graphics driver. Games can use different graphics APIs, resolutions, quality settings, and workloads. Their performance can also depend on the processor, memory, cooling, and game-specific optimization. Treat the Graphics Test as a quick, repeatable check of browser graphics performance, not as a substitute for measuring the game or app that is giving you trouble.
The test runs in your browser, so you can repeat it after a change without installing a benchmark.
