Digital Time Capsule β Online Write & Unlock on Future Date
Write a message and set a future date. It will be hidden until that day. All stored locally with countdown.
UD5 Toolkit
Write a message and set a future date. It will be hidden until that day. All stored locally with countdown.
Set a short timer with a themed emoji animation (e.g., pizza cooking). A playful visual countdown.
Add player names and tap +/- to track scores. Custom starting points. Works for any game.
Write and store encrypted daily journal entries directly in your browser's localStorage. Export as TXT. No sign-up, fully private.
See a list of notable historical events that happened on this day across years. Static data, no API needed.
Play the classic Snake game inside your browser. Arrow keys to move, eat the apple, grow longer. High score tracked locally.
Enter two Unix timestamps and get the exact difference in days, hours, minutes, and seconds. Quick time debugging.
Enter any date and instantly know which quarter it belongs to. Also shows fiscal quarter if start month set.
Log daily temperature and humidity of your incubator. Get alerts when approaching critical days. Improves hatch rate.
Animate elements as they enter and exit the viewport using view() timeline. Parallax and reveal effects without JS.
Compute Poisson probabilities for a given mean rate. Ideal for call centers, traffic analysis. Instant chart.
Test overscrollβbehavior: contain to prevent background scroll or pullβtoβrefresh. See the effect in a live demo.
Select a US state and legal category (debt, personal injury) to see typical time limits. Quick informational guide.
Find out what day number of the year any date is (1β366). Also shows days remaining. Simple reference.
Write daily notes encrypted with a password. All data stored in your browser. Export as encrypted file. True privacy.
Load a video file and grab any frame as a still image. Navigate frame by frame. Download the snapshot. All done on your device.
Add N business days to a date, skipping weekends and optionally entering custom holidays. Regional presets.
Enter your clay's shrinkage rate and the desired fired size to determine the wet dimensions you need to throw or slab build. Essential for functional ware.
Type JavaScript expressions and see output like a real browser console. Supports console.log, error, warn. Use for quick testing without DevTools.
A big button that triggers a colourful confetti cannon fullβscreen. Use it to celebrate small wins. Pure joy.
Connect a game controller and see every button press, axis movement, and vibration test. Uses the Gamepad API.
Calculate tips and split bills easily. Adjust tip percentage and number of people. Perfect for dining out. All computations happen on your device.
Enter L*a*b* values and see the corresponding RGB and hex color. Useful for advanced color manipulation.
Apply userβselect: none, text, all and see how it affects selection. Copy the CSS snippet for your UI elements.
Design a fully styled scrollbar with colors, width, and border radius. Get the CSS for Chrome and Firefox.
Calculate resistor values for transistor fixed bias or voltage divider configuration. Quick quiescent point analysis.
Quick reference for what to do (and not do) after a snake bite. Pressure immobilization bandage diagram.
Test the new HTML popover attribute for creating accessible tooltips, menus, and dialogs without JavaScript. Copy code snippets.
Design a pure CSS tooltip with custom text, position (top/bottom/left/right), and arrow. Copy the clean code.
Convert numbers to Roman numerals and decode Roman numerals back to numbers. Supports up to large values. A fun educational tool running entirely in your browser.