All Tools

Test your monitor's refresh rate with visual animations. Compare simulated Hz against your native rate and spot frame drops instantly.

Calculate a display's physical width, height, and pixel density (PPI) from its diagonal size and resolution, then compare monitors, laptops, tablets, and phones side by side.

Turn your screen into an accurate ruler. Calibrate to your screen size, then measure objects in centimeters or inches by placing them against the display.

Find out your screen resolution and viewport size instantly. See pixel ratio, color depth, aspect ratio, and the matching CSS breakpoint.

Test your typing speed and accuracy. Measure WPM (words per minute) and CPM (characters per minute) with live stats, then track your progress over time.

Test your microphone online with a real-time waveform and volume meter. Record up to 10 seconds and play it back to hear yourself before calls or recordings.

Test your speakers and headphones online. Check left and right channels, sweep frequencies from 20 Hz to 20 kHz, and play tones, noise, or your own audio.

Test your webcam with a live preview, capture photos, and check microphone levels. View camera resolution, FPS, aspect ratio, and lighting.

Test mouse buttons, scroll wheel, click speed (CPS), double-click, and drag. Visual feedback and live counters show if every button works.

Test every key on your keyboard in the browser. Pressed keys glow, tested keys turn green, and a history log catches ghosting and double-typing. Full, TKL, and MacOS layouts.

Count characters, words, sentences, and paragraphs instantly as you type. Check your text against platform limits for Twitter, Instagram, YouTube, and more.

An online calculator with standard and scientific modes. Handles trigonometry, logarithms, powers, percentages, and parentheses, with live results, history, and keyboard support.