UD5 Toolkit
Random Tattoo Idea Generator - Online Flash Sheet Picker
Get a random tattoo concept with style and placement suggestion. For fun and inspiration only. Not real art.
Pixel Art Drawing Board - Online Retro Sprite Maker
Pixel Art Maker
3D RGB Color Cube - Online Interactive Space
Explore the RGB color space as a rotatable 3D cube. Pick a color directly from the volume. Drag to rotate. Canvas 3D.
Perfect Circle Drawing Challenge - Online Canvas Game
Try to draw a perfect circle freehand. Score based on roundness. Fun and addictive. No data sent.
3D Perspective Box Drawer - Online Isometric Cube Tool
Draw a 3D box or room interior by dragging vanishing points. Great for learning perspective drawing. Export as image.
Ellipse Drawing Tool - Online Interactive Geometry
Draw perfect ellipses by dragging focal points and a point on the curve. See the equation update dynamically. Educational.
Online Scratch Card - Virtual Reveal & Surprise Message
Create a virtual scratch card with a hidden message or prize. Send the link; recipient scratchs with mouse/touch. Canvas-based.
String Art Pattern Preview - Online Thread Layout on Circle
Design circular string art by ticking nails and seeing simulated thread lines. Adjust number of nails and steps. Export pattern. Local only.
Hex to RGBA Converter - Online Add Alpha Channel
Convert a hex color to RGBA and add an opacity slider. Get the exact CSS string for modern transparent designs.
Multi Dice Roller - Online 3D Animated Dice
Roll virtual dice with animated 3D spins. Choose any number and type. See total and individual results. Fun for games.
Random Element Combination - Online Little Alchemy Style
Combine two random elements and get a surprising result. Inspired by Little Alchemy. Infinite ideas. All local.
Tangram Puzzle - Online Drag & Match Shapes
Drag the seven tangram pieces to form a target silhouette. Multiple puzzles. Develop spatial thinking. All canvas interactions.
Periodic Table Speller - Online Write Words with Elements
Type a word and see if it can be spelled using chemical element symbols. Geeky custom message creator. Copy or share.
Memory Card Matching Game - Online Flip & Find Pairs
Classic memory card game with emoji or color themes. Select grid size and try to find all pairs in minimum moves. Brain training fun.
Math Worksheet Generator - Online Printable Drills for Kids
Generate printable math worksheets for addition, subtraction, multiplication, and division. Choose difficulty and number of problems. Answer key included.
Polygon Area Calculator - Online Irregular Shape Tool
Calculate the area of an irregular polygon by entering its vertex coordinates. Uses the shoelace formula. Pure math.
Leap Year Checker - Online Verify February 29
Enter a year to check if it is a leap year. Shows the rule explanation and next/previous leap years. Simple reference.
Birthday Card Message Generator - Online Wish
Get a random heartfelt or funny birthday message to write in a card. Choose from various tones. Local.
Data Storage Converter - Online Byte KB MB GB TB Tool
Convert between digital storage units: bits, bytes, kilobytes, megabytes, gigabytes, and more. Binary and decimal interpretations available. A developer must-have.
Veggie Match Memory Game – Online Flip & Find Pairs
Cute vegetable-themed memory matching game for preschoolers. No ads, simple interface.
Memory Card Matching Game - Online Flip & Find Pairs
Classic flip‑to‑match pairs game. Choose grid size and card theme. Tracks moves and time. All local.
CMYK to Pantone Converter - Online Approximate Match
Enter CMYK values and find the closest Pantone Solid Coated color. For print design reference. Client‑side lookup.
Card Deck Probability Calculator - Online Poker & Draw
Calculate odds of drawing specific cards or poker hands from a standard deck. Learn combinations. Local math.
Email Permutator - Online Generate All Possible Addresses
Enter a first name and last name, plus a domain, to generate common email address patterns. For finding contacts.
Rock Paper Scissors Lizard Spock - Online Big Bang Game
Play the extended 5‑gesture version against a CPU. Rules explained. Score tracking. A geek classic.
Eye Prescription Converter - Glasses to Contact Lens Rx Tool
Approximate conversion from eyeglass prescription to contact lens power. Uses vertex distance formula. For educational purposes only, consult your optometrist.
Pi Digits Viewer - Online Scrolling Infinite π
Scroll through thousands of pre‑computed digits of π. Search for a specific string of digits. For math lovers.
Disc Golf Putting Probability Calculator - Online C1X/C2 Stats
Estimate make probability of a putt based on distance and skill rating. For disc golf enthusiasts. Fun statistical tool, no data upload.
HMAC Generator - Online SHA‑256/512 Message Authentication
Create an HMAC (Hash‑based Message Authentication Code) using SHA‑256 or SHA‑512 with a secret key. Verify data integrity. Local.
Kanji Stroke Count Quiz – Online Guess & Order
A kanji appears; you guess how many strokes it has. Learn stroke order awareness.
Daily Mystical Fortune - Online Crystal Ball & Tarot
Peer into the virtual crystal ball to get a randomly generated, absurdly specific fortune. A fun start to your day.