Idle Detection API Demo - Online User Activity Monitor
Request permission and detect when the user is idle (away from keyboard). See screen lock state. For native‑like apps.
UD5 Toolkit
Generate random user events to test idle detection and session timeout logic.
click, mousemove, or keydown events on the host page, so your application code will not see them.Request permission and detect when the user is idle (away from keyboard). See screen lock state. For native‑like apps.
Generate a random, structured daily routine with time blocks. Shake up your day. Pure fun.
Shows a counter of how many seconds you have been idle. Tracks mouse and keyboard activity without recording.
Create a random, aspirational quarterly objective with unrealistic key results. For meeting icebreakers.
Simulate rolling dice for board games, RPGs, and decision making. Choose number of dice and faces. Fun, lightweight, and no download required.
Get a random, no‑equipment workout with exercises, reps, and rest. Perfect for home fitness. Local algorithm.
Test how your page loads under slow, 3G, or offline conditions by intercepting fetch and applying delays. No DevTools needed.
Set up resources and processes and run the Banker's algorithm to check for safe states. Classic OS deadlock avoidance demo.
A giant Yes/No button that gives a random answer with a satisfying animation. The simplest decision helper ever.
Can’t decide? Use a coin flip, yes/no randomizer, or a customizable wheel. Multiple fun methods to break analysis paralysis. Pure browser fun.
Check current screen orientation and test the lock API. Useful for mobile web apps. Demo with code.
Get a random but compatible PC build list (CPU, GPU, RAM). For fun or mock builds. Prices static.
Enter a URL and get a rough client-side performance simulation: request count, DOM size, and potential speed tips. No real Lighthouse.
Step‑by‑step interactive animation for the PCT bear bag hanging method. Practice the throw and tie before you go.
Generate random, secure coupon codes with a prefix. Choose length and character set. Perfect for store admins. All local.
Click moving targets as fast as possible. Score time and accuracy. Fun benchmark.
Paste a list of numbers to visually check uniformity, mean, and simple pattern analysis. Educational tool for statistics and RNG.
Check if the current page can be loaded offline by examining the service worker cache. Developer tool for PWAs.
Generate a random, completely fake analytics dashboard snippet. 'Bounce rate: 98% from Mars.' Geeky humor.
Generate random dungeon maps with rooms and corridors. Use for tabletop RPGs. Every layout is unique. Export as image.
Generate a random, generic positive testimonial for product mockups. 'Great product! Changed my life.' Realistic filler.
Turn your text into a random mix of upper and lower case letters. Great for pranks or silly posts. All local.
Test the Fullscreen API: request fullscreen on a colored div, detect changes, and copy the JavaScript boilerplate.
Keep track of a tennis match: points, games, sets, and deuce. Supports tiebreak. Great for friendly matches. Local.
Get a random dessert recipe with ingredients and steps. From cakes to cookies. Solve your sweet cravings. Local database.
Set launch angle, initial speed, and height. See the trajectory, max height, and range plotted on a canvas. Learn kinematics.
Stuck deciding what to cook? Generates random meal suggestions from a curated list. Filter by protein, cuisine, or cooking time. Save favorites locally.
Generate a unique geometric or pixel-art avatar from a random seed. Download as PNG. Perfect for default user icons. No upload.
Enter names and number of teams to generate random balanced groups. Quick way to form teams for games, projects, or icebreakers.
Log neck, chest, waist, hip, and limb measurements over time. See changes on a chart. All data stored locally.