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How we handle your dataLaboratory · Internet and devices
Internet and device tests
Separate tools grouped by topic. Measurements run in your browser against the nearest test server; results are not sent anywhere.
Speed and latency
Download, upload, latency to the nearest test server, latency under load and stability.
Internet Speed TestMeasure download, upload, latency and jitter to the nearest test server, with latency under load and what your connection is likely enough for.Download Speed TestMeasure only download speed and idle latency. Uses less data than the full test.Upload Speed TestMeasure upload speed and latency while uploading, for video calls, streaming and cloud backups.Ping Test — latency and jitter to the nearest serverMeasure HTTP request latency and jitter to the nearest test server. This is not an ICMP ping.Bufferbloat TestCompare idle latency with latency while downloading and uploading to see whether your connection lags under load.Internet Stability TestRun several short tests in a row and see the spread of speed and latency. Up to five runs while this tab is open.Live Ping Monitor — latency over timeWatch latency and jitter to the nearest test server second by second while this tab is open, with drops and spikes marked.Wi‑Fi vs Ethernet TestRun a speed test on Wi‑Fi and again on a cable (or in another room), then compare the two results side by side.
Calls and gaming
Is your connection and setup ready for a video call, and how far are game servers.
Video Call Test — ready for Zoom, Meet and Teams?Check speed, latency, microphone, camera and speakers in one pass and see whether your setup is likely ready for a video call.Game Server Latency — approximate distance to game regionsEstimate HTTP latency from your browser to public endpoints in game server regions. An approximation, not the in-game ping.
IP and network
Your IP address, network and IP version as seen by the nearest test server.
What Is My IP — IP address and networkSee your public IP address, IP version and the network that announces it. The network name may differ from your retail provider.IPv6 Test — IPv4 and IPv6 connectivityCheck whether your connection works over IPv4, IPv6 or both, and which one your browser uses.Is My Internet Working?Check in a few seconds whether this device is online, whether names resolve and whether the internet answers, with what to try next.Subnet Calculator — IP, CIDR, mask and wildcardWork out network and broadcast addresses, host range, mask and wildcard mask for IPv4 and IPv6 prefixes.Wi‑Fi QR Code GeneratorMake a QR code that joins your Wi‑Fi without typing the password, and generate a strong password. Everything stays on this device.
Privacy
What your browser reveals about your addresses through WebRTC.
WebRTC Leak TestSee which IP addresses your browser exposes through WebRTC, for example while using a VPN.VPN Test — is your VPN hiding you?Compare the country of your IP, your browser's time zone and language and the addresses WebRTC reveals to see whether your VPN is working.What Are My HTTP HeadersSee the headers your browser sends to websites: user agent, languages, client hints, Do Not Track and more.
DNS
How fast public DNS-over-HTTPS resolvers answer from your browser.
DNS Speed Test — compare public DNS resolvers (DoH)Compare how fast public DNS-over-HTTPS resolvers answer from your browser; Google only with your consent. This is not your router's or provider's DNS.DNS Lookup — A, AAAA, MX, TXT and moreLook up the DNS records of a domain through public DNS-over-HTTPS resolvers, from your browser.
Microphone, camera and sound
Check your microphone, camera, speakers and headphones, record, measure sound and generate tones.
Microphone TestCheck that your microphone works, see the input level and record a short sample that stays in your browser.Webcam TestCheck that your camera works and see its resolution and frame rate. The video stays in your browser.Speaker TestPlay test tones on the left and right channels and check your speakers or headphones.Headphone Test — left, right and stereoCheck left and right channels, stereo balance, phase and frequency range of your headphones.Tone GeneratorPlay a pure tone or sweep at any frequency, with sine, square, triangle and sawtooth waves.Voice RecorderRecord your voice in the browser, play it back and save the file. The recording stays on your device.Decibel Meter — relative sound levelSee how loud your surroundings are through your microphone. Uncalibrated: levels are relative, not certified dB SPL.Online MirrorUse your camera as a mirror, with zoom, brightness and a full-screen view. The video stays on your device.
Keyboard, mouse and controllers
Check keys, clicks, the wheel, gamepads and touch screens.
Keyboard TestPress keys to see which ones register, including modifiers and repeated presses.Mouse TestCheck clicks, double clicks, the wheel and extra buttons of your mouse.CPS Test — click speed testCount how many clicks per second you make in 1, 5, 10 or 30 seconds, with your best results kept on this device.Double Click TestCheck whether your mouse registers unwanted double clicks and how fast your double clicks are.Spacebar CounterCount how many times you press the spacebar in a set time, with presses per second.Gamepad Tester — controller testCheck buttons, triggers and sticks of your controller, with stick drift and dead zone, and test vibration where supported.Touch Screen TestDraw on the screen to find dead zones and see how many touches your screen detects at once.
Screen
Dead pixels, refresh rate, colours, frame rate, resolution and browser details.
Dead Pixel TestFill the screen with solid colours to spot dead or stuck pixels.Screen Refresh Rate TestEstimate your screen refresh rate from the browser's frame timing. Browsers can limit the measured rate.White Screen — full-screen colourFill the screen with white or any colour, adjust brightness, and use it as a light or to clean and check the screen.Monitor Test — colours, gradients and uniformityCheck colours, gradients, black and white levels, uniformity, sharpness and viewing angles of your monitor.FPS Test — browser frame rateSee the frame rate your browser renders and how smooth motion looks at different speeds. Browser frame rate, not game FPS.What Is My Screen ResolutionSee your screen resolution, browser window size, pixel ratio, colour depth and orientation.What Is My Browser — browser and device detailsSee your browser, version, operating system, user agent, language, time zone and which features are enabled.Black Screen — full-screen blackFill the screen with pure black for OLED checks, backlight bleed, dark rooms or as a blank screen.Stuck Pixel FixerFlash rapidly changing colours over a stuck pixel to try to revive it. Dead (always black) pixels usually cannot be fixed.
Planning
How much speed you need, transfer times, unit conversion, bandwidth and pixel density.
How Much Internet Speed Do I Need?See what speed and latency gaming, video calls, HD and 4K streaming usually need, with the sources of each threshold.Download Time CalculatorWork out how long a file of a given size takes at a given speed, in Mbit/s or MB/s.PPI Calculator — pixel density of a screenWork out pixels per inch, dot pitch and screen size from resolution and diagonal.Mbps to MB/s ConverterConvert between Mbit/s, MB/s, Gbit/s and other data rate units, with MB and MiB kept apart.Bandwidth Calculator — how much speed for your householdAdd up streams, calls, games and devices to see how much download and upload speed a household needs.Data Usage Calculator — how many GB per monthEstimate monthly data use from streaming, calls, gaming, browsing and downloads, for mobile plans and data caps.Streaming Bitrate Calculator — upload speed for streamingSee the video bitrate and upload speed you need to stream at 720p, 1080p, 1440p or 4K and at 30 or 60 frames per second.Video File Size CalculatorWork out how much space a recording takes at a given bitrate and length, or which bitrate fits a size.