Speed Test & Diagnostics

Free internet speed test: check download, upload, ping, jitter, packet loss and bufferbloat with parallel-stream saturation. Speedometer gauge, ISP and server info, plan comparison, 4K/gaming verdicts and CSV history. No ads, no app.

See your public IP address instantly and look up the location, ISP, ASN and timezone of any IPv4 or IPv6 address, free, no signup.

Free online white screen: fill your display with bright full-screen white light in one click. Adjustable brightness and color temperature (1500K-12000K), ring light and softbox shapes, 16 solid color screens plus custom hex, test patterns, screensavers, prank screens, keep-awake, sleep timer, touch lock for tracing and PNG downloads up to 8K.

Free online monitor refresh rate test and Hz checker. Check whether your screen is actually running at 60Hz, 75Hz, 100Hz, 120Hz, 144Hz, 165Hz, 200Hz, 240Hz or higher with live Hz, average, 1% low, frame time, jitter and stability measurements. Includes a timed benchmark and fullscreen screen-tearing test. No download or sign-up.

Free monitor ghosting test: check motion blur, ghosting trails and overdrive artifacts at 60, 144, 240 Hz and up. Three frame-rate lanes, 6 speeds, 5 backgrounds and a frame-skip check.

Free online FPS test: live frame-rate meter, refresh-rate detection, 1% and 0.1% lows, frame-time graph, 15/30/60 FPS motion comparison and CPU or GPU (WebGL) stress benchmarks with a grade. No download, 100% in-browser.

Free online dead pixel test and stuck pixel fixer, fill your screen with pure solid colors in fullscreen to find dead, stuck and hot pixels on a monitor, laptop, phone or TV. Includes a gradient banding test and an RGB flashing pixel fixer. 100% in-browser, no download.

Free online vision test with 10 calibrated eye tests: 20/20 eye chart, color blindness plates, color threshold, D-15 hue, contrast sensitivity, astigmatism, Amsler grid, near vision, duochrome and visual field. Per-eye results and a downloadable report.

Free online CPS test: measure clicks per second in timed (1 to 600 seconds), race-to-100 or endless mode, plus jitter, butterfly, drag, right-click, double-click, spacebar and scroll tests, with speed graphs and auto clicker and double-click detection. No signup. Rhythm analyzer, ghost race, goals and backup.

Free butterfly click test: measure your butterfly clicking CPS in 1 to 100 second runs, with a live graph, interval histogram, double-fire detection, personal bests and history. No download.

Free jitter click test: measure your jitter clicking CPS in timed runs with a live graph, per-second breakdown, consistency histogram, chatter detection and saved bests.

Free drag click test: measure your drag clicking CPS, see clicks per drag, and check whether your mouse supports drag clicking. Live graph, history and bests, no download.

Free right click test: measure right-click CPS, check your right mouse button for double-clicking or missed clicks, with a live graph, histogram and saved results.

Free mouse double click test: detect a mouse that double clicks by itself (switch chatter), test double-click speed, and see press intervals in a live chart.

Free mouse scroll test: measure scroll wheel speed in steps per second, see up vs down counts, and check for a mouse wheel that skips or jumps. No download.

Free spacebar counter and spacebar speed test: count spacebar presses per second in 5, 10, 30 or 60 second runs, with a live graph, history and bests. Auto-repeat is ignored.

Free mouse polling rate test: measure your mouse Hz (125 to 8000 Hz) live in the browser. Detected rate class, average/peak/median, stability score, jitter, wireless dropout check, interval scatter plot, A/B compare and CSV export.

Free mouse DPI analyzer: measure your real mouse DPI in the browser with raw input, compare it to your set DPI, average several trials and check sensor accuracy.

Free game sensitivity converter: convert CS2, Valorant, Apex, Overwatch 2, CoD, Fortnite, R6, Marvel Rivals and Deadlock sens, change DPI without changing feel, and calculate eDPI and cm/360.

Free online aim trainer with 12 drills and a custom drill builder, a 3D FPS mode with pointer lock and your real game sensitivity (Valorant, CS2, Apex, OW2, cm/360), flick, tracking and reflex tests, shot-grouping and overshoot analysis, routines, an Aim Rating and saved progress. An Aimlab / Kovaak's alternative with no download. Practice plan, aim habits, loadouts and backup.

Free online keyboard test: press every key and watch it light up on a full, TKL or laptop layout (ANSI/ISO, Windows/Mac). Detect dead, stuck and chattering keys, test N-key rollover and ghosting, and read key codes live. No download.

Free keyboard ghosting test: check n-key rollover (NKRO), find blocked keys, test combos like W + A + Shift + Space, and detect key chatter on a live on-screen keyboard. No download.

Free reaction time test online. Click when the screen turns green and get your reaction time in milliseconds. Seven modes (visual, audio, go/no-go, choice, color, target and PVT), accurate press-down timing, average, median, percentile, progress history and a challenge link to share.

Free typing speed test with timed, word, passage, code and custom-text modes. Live WPM, raw WPM, accuracy and consistency, a WPM chart, missed-key heatmap, problem words and saved personal bests. No signup, no ads in the way.

Free online gamepad tester, connect any controller and see every button, trigger and analog stick respond live. Detect stick drift, read exact axis values, adjust the deadzone, check polling rate and test rumble/vibration. Works with Xbox, PlayStation, Switch Pro and generic USB controllers, 100% in-browser.

Free stick drift test: measure joystick drift on Xbox, PS4, PS5 and Switch Pro controllers in your browser. Raw resting offset, worst drift, recommended deadzone and an outer-edge circularity score.

Free touch screen test: check multi-touch points, find dead zones, detect ghost touches, test tap accuracy and touch report rate on phones, tablets and touchscreen laptops. No app needed.

Test your microphone, webcam, and speakers in one place before any meeting or call. Live HD camera preview with real FPS, lighting and focus checks, a dBFS audio meter with spectrum and spectrogram, audio and video record-and-playback, left/right speaker test, and a call readiness score. 100% browser-based and private, nothing is uploaded.

Free speaker test: left right audio test for speakers and headphones, 20 Hz to 20 kHz frequency sweep, bass test, polarity (phase) check and tone generator. Runs in your browser.