All Tools

Run the Matrix digital rain effect in your browser. Customize the color, speed, density, font size, characters, and direction of the falling code.

Play five virtual fidget toys online — spinner, Pop It, fidget cube, switches, and infinity cube — to relieve stress and stay focused.

Layer rain, nature, urban, and noise sounds into one custom soundscape for focus, relaxation, or sleep, with volume control for every track.

Play soothing cat purring sounds to relax, focus, or sleep. Mix multiple cats with rain, fireplace, and cricket backgrounds, and set a sleep timer.

Simulate realistic OS update screens fullscreen to prank friends. Supports Windows 11, Windows 10, macOS, and Ubuntu with stuck mode, BSOD, and kernel panic effects.

Pop virtual bubble wrap in your browser for instant stress relief, with realistic pop sounds, color and size options, and timed challenges.

Calculate running pace, finish time, or distance. Enter any two values and get the third automatically with metric and imperial support.

Generate a realistic fake Blue Screen of Death to prank friends. Choose Windows 11/10, 8, 7, or XP, pick a stop code, and set an auto-trigger timer.

Simulate a cracked screen to prank your friends. Tap anywhere to create realistic glass crack effects with sound, custom backgrounds, and an auto-crack timer.

Simulate a fake file download that never finishes. Pick a preset filename, set the speed, and watch the progress bar stall near 99% with random error popups.

Estimate your one rep max (1RM) from the weight and reps you can lift, using 7 proven strength formulas.

Estimate your VO2 max aerobic fitness from a Cooper test, beep test, race result, or heart rate, then see your rating by age and gender.