Find the problem.
Test your connection and devices.
Internet cutting out, mouse double-clicking or microphone buzzing? Run a simple test to narrow down the problem.
Interface example · these are not your test results
What would you like to check?
Select check. We'll explain everything else along the way.
Internet stability test
Monitor brief disconnections, latency spikes and unanswered requests. Save a chart and event log to share with your internet provider.
Mouse double-click test
Check for unintended rapid clicks when you press once. Test each mouse button separately and inspect the intervals between clicks.
Keyboard double typing test
Find keys that register extra presses. The tester distinguishes repeated key presses from normal auto-repeat while a key is held down.
Packet loss test
Check delivery of numbered WebRTC messages: missing messages to the server, missing replies and replies that arrive late.
Mouse scroll wheel test
Look for reversed scroll events while scrolling in one direction. Counters and an event log show what the browser receives.
Ping and jitter test
See average latency, median, p95 and variation between responses. The chart reveals spikes that an average can hide.
Bufferbloat test
Compare latency while idle, downloading and uploading. Look for the delay that builds up when the connection is busy.
Controller stick drift test
Check analog sticks at rest, their range of movement and how they return to center. Compare raw axis readings before and after a change.
CGNAT and public IP check
Compare the public IPv4 seen by our server with your router’s WAN address. Check for signs of another NAT layer and learn what the comparison cannot prove.
Microphone noise test
Compare a few seconds of silence with normal speech. Inspect digital background levels, speech levels and signs of clipping.
Mouse button hold test
Check whether a button stays pressed while you hold it and move the mouse. The event log records releases and hold duration.
Keyboard ghosting and rollover test
Check which key combinations reach your browser together. Useful when a game misses a jump or another action while you are moving.
Internet speed test
Measure download and upload throughput to our server. Each result includes the data used, test duration and connection conditions.
Mouse button test
Check left, right, middle and side buttons. See press and release events and the number of events received.
Keyboard test
Check each key on a virtual keyboard. See its physical code, the character received and which keys you have tested.
Gamepad controller test
Check controller buttons, triggers and axes. See which values and input events your browser receives.
Mouse polling rate estimate
Estimate how often mouse movement events reach the browser. Compare connection modes and polling rate settings; this is not a direct USB measurement.
Microphone test
Check your selected microphone, signal level and a voice recording. The recording stays in this tab and plays only when you choose to listen.
Left and right headphone test
Check stereo channels, balance and speakers. Test sounds are generated locally in your browser.
Online tone generator
Play a quiet test tone at a chosen frequency. Compare how your headphones reproduce different tones.
Webcam test
View the selected camera, the stream resolution and an estimated frame rate. Save a snapshot locally if you want to.
Dead pixel test
Display solid colors in full screen and inspect your screen. Compare suspicious dots against several backgrounds.
Backlight bleed and screen uniformity test
Inspect dark and gray fields. Compare the corners and edges of your display under the same conditions.
Screen gradient and color banding test
Inspect grayscale and color transitions, subtle shade differences and visible banding.
Browser frame rate test
Measure requestAnimationFrame intervals and compare animation smoothness. Look for missed frames in this browser, not a certified panel refresh rate.
Touchscreen test
Trace the grid with a finger and see which areas receive touch events. Look for places where the line repeatedly breaks.
Multitouch test
Check how many simultaneous touch points your browser receives. Each finger appears as a separate point.
What is my IP address?
See the IP address used to reach our server. Compare it with your router’s WAN address or with another connection.
Reaction time test
Measure your reaction to a visual cue. Five attempts show the median and variation in your response time.
Audio video sync test
Compare a short sound with a flash. Adjust the perceived offset for headphones, speakers or a TV and save your chosen setting.
Audio mono compatibility test
Check an audio file for opposing channel polarity, an empty channel and cancellation when summed to mono. Listen and download a report without uploading your file.
Chroma subsampling 4:4:4 test
Compare fine color and black-and-white stripes. Inspect color detail on a monitor or TV and download the pattern as a native-size PNG.
VPN speed test
Compare the incoming and outgoing speeds of two connections: baseline measurement, retest, and percentage difference in one tab.
VPN latency test
Measure HTTP RTT, delay fluctuations, and unanswered samples through the current connection. Compare it to the baseline measurement to the same node.
VPN stability test
Leave the connection check for a few minutes: the delay schedule, the response log and pauses when you hide the tab. Download the report for support.
VPN country and IP check
See the IP address observed by our server, its estimated country and protocol version. Compare the address before and after changing your connection.
WebRTC IP leak test
Compare the HTTP address with the available WebRTC candidates, see if another public address is visible when using the current connection.
Mobile data usage calculator
Calculate gigabytes for video calls, broadcasts, and bitrate downloads and time, and see how many days a packet lasts.
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Your recent checks
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Sound, video and clicks are not sent to our server.
We show what was measured, what it means and what to check next.
From symptom to solution
Internet keeps disconnecting for a few seconds
Step-by-step check of short breaks: connection log, comparison of Wi-Fi and cable, ready-made list of data for provider support.
Figure it outMouse double-clicking on a single click
Test the fast repeat clicks, separate the system settings from the button failure, and repeat the test on a different connection.
Figure it outMicrophone background noise
Local microphone test with dBFS indicator and recording. How to compare silence and speech and find the cause of noise in an application.
Figure it outFast speed test, but calls still lag?
Start with latency under load and a stability log. For a metered mobile plan or hotspot, estimate your call data first. Compare the same endpoint and traffic budget when testing a work VPN; results from different servers are not directly comparable.