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Browser-native diagnostics · 18 modules

Know what’s
working.

Check your device. Benchmark performance. Test your reflexes. Get a clear answer in seconds — right in your browser.

Browse all tests ↓Private by design.
Network use is always explained.
SIGNAL CONSOLELIVE / 18
✓READYAll browser systems available
AUDIO
DISPLAY
INPUT
PrivacyLOCAL
SetupZERO
Response< 1 SEC
Test console / 18 modules

Choose your diagnostic.

Device checks, performance benchmarks and human tests.
Zero setup. Immediate signal.

01Device checkMicrophoneSee your voice move in real time and confirm that your microphone is picking up sound.Test now ↗02Device checkWebcamPreview your camera, check its resolution and make sure the picture looks right before a call.Test now ↗03Device checkSpeakersPlay a clear test tone through both speakers, or check the left and right channels separately.Test now ↗04Device checkKeyboardPress keys and see them light up instantly to spot missing, stuck or unreliable inputs.Test now ↗05Device checkMouseCheck movement, left, right and middle buttons, your scroll wheel and double-clicks in one place.Test now ↗06Device checkScreenFill your display with solid colors to make dead, stuck or unusually bright pixels easier to see.Test now ↗07Device checkRefresh rateEstimate how many times your display updates each second and check frame timing stability.Test now ↗08Human testReaction timeWait for the color change, react as quickly as you can and compare your attempts in milliseconds.Test now ↗09Human testClick speedClick or tap as many times as possible in five seconds and get your clicks-per-second score.Test now ↗10Device checkGamepadConnect a controller and check every button, trigger and analog stick with a live visual readout.Test now ↗11Device checkTouchscreenDraw across the screen and use several fingers to find missed touches, dead zones or multi-touch problems.Test now ↗12Human testTyping speedType a short passage for 30 seconds and get your words-per-minute, accuracy and personal best.Test now ↗13Device checkResolutionSee your reported screen size, viewport, pixel ratio, color depth and orientation in one clear report.Test now ↗14Device checkBrowser infoIdentify your browser, operating system and useful web capabilities without sending device data anywhere.Test now ↗15Performance testCPURun a short single-core and multi-core processor benchmark and get a clear browser-based CPU score.Test now ↗16Performance testGPUMeasure browser graphics throughput, check WebGL and WebGPU support and see the GPU name when your browser exposes it.Test now ↗17Performance testStorage speedMeasure browser storage read and write speed with a temporary 32 MB file that is deleted when the test finishes.Test now ↗18Performance testInternet speedMeasure download speed, upload speed, ping and jitter against Cloudflare's nearby edge network.Test now ↗
INPUT / 01Select one signal

Open the exact diagnostic you need.

PROCESS / 02Run it transparently

Local tests stay on-device; network tests explain traffic first.

OUTPUT / 03Read the result

A clear answer appears immediately.

Privacy architecture

The default setting
is private.

01Your media stays local

Camera and microphone streams are processed only in your browser.

02No identity layer

Every test works without an account, profile or personal history.

03Transparent measurements

Each result explains what a browser test can — and cannot — confirm, including any network use.

After the result

Understand it.
Then fix it.

Focused guides explain what the browser observed,
what it could not prove and what to check next.

01 / Audio troubleshooting

Fix a microphone that is not working

Find out why a microphone is not working with a practical checklist for browser permissions, input selection, system privacy, connections and hardware.

3 min read →02 / Camera troubleshooting

Improve webcam quality

Improve webcam image quality by checking resolution, lighting, focus, framing, connection, permissions and application settings in the right order.

3 min read →03 / Network guide

Understand speed, ping and jitter

Understand download speed, upload speed, ping and jitter, then run fair internet tests and isolate Wi-Fi, VPN, congestion and provider issues.

3 min read →
Browse all troubleshooting guides →