Memory Card Matching Game - Online Flip & Find Pairs
Classic flipโtoโmatch pairs game. Choose grid size and card theme. Tracks moves and time. All local.
UD5 Toolkit
Click any card to start the game and begin the timer!
Classic flipโtoโmatch pairs game. Choose grid size and card theme. Tracks moves and time. All local.
Cute vegetable-themed memory matching game for preschoolers. No ads, simple interface.
Calculate odds of drawing specific cards or poker hands from a standard deck. Learn combinations. Local math.
Create a virtual scratch card with a hidden message or prize. Send the link; recipient scratchs with mouse/touch. Canvas-based.
Combine two random elements and get a surprising result. Inspired by Little Alchemy. Infinite ideas. All local.
Get a random heartfelt or funny birthday message to write in a card. Choose from various tones. Local.
Select a destination language and generate a printable mini phrasebook with essential greetings, directions, food, and emergency phrases. Local only.
Convert between digital storage units: bits, bytes, kilobytes, megabytes, gigabytes, and more. Binary and decimal interpretations available. A developer must-have.
A collection of clean, familyโfriendly riddles with a revealโonโclick answer. Random riddle each time. Perfect for break time.
Drag the seven tangram pieces to form a target silhouette. Multiple puzzles. Develop spatial thinking. All canvas interactions.
Type a word to see all its homophones with definitions. Avoid embarrassing mistakes (their/there/theyโre). Static dictionary.
Play the extended 5โgesture version against a CPU. Rules explained. Score tracking. A geek classic.
Design circular string art by ticking nails and seeing simulated thread lines. Adjust number of nails and steps. Export pattern. Local only.
A kanji appears; you guess how many strokes it has. Learn stroke order awareness.
Enter two names and get a playful love compatibility percentage. Purely for entertainment! All calculation happens instantly in your browser.
Convert any text to a long string of binary digits. Perfect for learning binary representation. Local conversion.
Complete a 10x10 multiplication grid against the clock. A fun way to master times tables.
Enter CMYK values and find the closest Pantone Solid Coated color. For print design reference. Clientโside lookup.
Convert across length, mass, speed, temperature, data, and more. Search any unit and type. Compact and fast.
Answer a series of deliberately confusing and trick questions. Lives system and funny wrong answers. Playful, no data stored.
Estimate make probability of a putt based on distance and skill rating. For disc golf enthusiasts. Fun statistical tool, no data upload.
Scroll through thousands of preโcomputed digits of ฯ. Search for a specific string of digits. For math lovers.
Convert a numeric amount into English words, perfect for writing checks or legal documents. Supports USD/GBP styles.
Compute probability for simple events, as well as permutations and combinations (nPr, nCr). Useful for statistics and game theory. Browser-based math.
Try to draw a perfect circle freehand. Score based on roundness. Fun and addictive. No data sent.
Enter a threeโletter currency code like USD or EUR and instantly see the corresponding symbol and number of decimals. Quick developer reference.
Draw pixel art with a grid, color palette, and eraser. Export as PNG. Perfect for game developers and hobbyists.
Practice mental arithmetic with customizable operators and digit count. Timed rounds, score tracking. Works offline. Improve your brain speed.
Roll virtual dice with animated 3D spins. Choose any number and type. See total and individual results. Fun for games.
Enter a first name and last name, plus a domain, to generate common email address patterns. For finding contacts.