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PC & peripherals

All the free tools you need to test and plan your PC: check your mouse, keyboard, controller, monitor, microphone and speakers, find the right PSU wattage, identify CPU and GPU bottlenecks, and estimate your PC's FPS. Everything runs in your browser, with no uploads or account required.

Bottleneck calculator

Choose a CPU and graphics card, set the resolution, and see whether your PC is being held back: bottleneck percentage, utilization of both components, and an upgrade recommendation.

Built by Luca Stanek

Keyboard Tester

Test your keyboard online: Check every key live, find broken keys, measure rollover, and detect double presses. Runs entirely in your browser.

Built by Luca Stanek

Gamepad & Controller Test

Browser-based gamepad test for PS5, PS4, Xbox, and PC controllers: check buttons, sticks, and triggers, measure stick drift with a deadzone recommendation, and test vibration.

Built by Dimitri Heissler

Monitor Test & Dead Pixel Test

Test your screen in the browser: find dead pixels in full screen, measure Hz and FPS, check resolution, and test for ghosting, backlight bleeding, and color banding.

Built by Dimitri Heissler

Mouse Test

Online Mouse Test: Check all mouse buttons, including extra buttons, detect double-click issues, test scroll wheel direction, and measure the polling rate in Hz.

Built by Dimitri Heissler

Microphone Test

New

Test your microphone online: check live levels, detect clipping and silence, listen to a recording, measure background noise, and compare Discord filters.

Built by Justin Schuessler

Speaker & Headphone Test

New

Test speakers and headphones online: check left/right, identify speakers with reversed polarity using a phase check, run a frequency sweep from 20 Hz to 20 kHz, and test surround sound in 5.1/7.1.

Built by Justin Schuessler

PSU Calculator (Power Supply Calculator)

Power supply calculator for your PC: Choose a CPU and GPU class or wattage, configure accessories and overclocking, and see the recommended power supply wattage with headroom.

Built by Dimitri Heissler

FPS Calculator

New

Choose a game, CPU, graphics card, RAM, and resolution: the FPS calculator compares your PC with the system requirements, estimates FPS for each graphics preset, and recommends the right one.

Built by Dimitri Heissler

FAQ

Frequently asked questions

Brief answers about our free tools.

Nine tools: Mouse Test, Keyboard Tester, Gamepad & Controller Test, Monitor & Dead Pixel Test, Microphone Test, Speaker & Headphone Test, PSU Calculator (power supply calculator), Bottleneck Calculator, and FPS Calculator. All free, with no account or installation needed.

Open the appropriate tool and use your device: the Mouse Test shows all buttons and the polling rate in Hz, the Keyboard Tester highlights each key you press, and the Gamepad & Controller Test shows buttons, sticks, and triggers live. No installation needed.

Use the Monitor & Dead Pixel Test: it fills your screen with solid colors that make dead or stuck pixels easy to spot, and includes additional display and color tests.

No. The Microphone Test and Speaker & Headphone Test run entirely in your browser, with no uploads to our servers. The browser uses your microphone only with your permission.

The PSU Calculator uses your CPU and GPU class, peripherals, and overclocking to recommend a power supply wattage with headroom. The Bottleneck Calculator uses your CPU, graphics card, and resolution to show whether one component is holding the other back. Both provide estimates based on sample values.

Yes, we're constantly expanding the collection. If a tool is missing, let us know through support.

Any more questions?

Contact Support