UD5 Toolkit
Emoji Lookup - Online Search & Copy All Emojis
Search the complete emoji set by keyword or code. Click to copy. Includes skin tones and flags. Always up to date with Unicode.
Reference Guides - Cheat Sheets
99+ toolsUSB Pinout Reference - Online Connector Wiring Guide
Reference diagrams for USB‑A, USB‑C, micro‑USB pinouts. See wire colors and signal descriptions. Hardware hacking helper.
Week Number & Start/End Dates - Online ISO 8601
Enter any date and get its ISO week number, plus the start and end dates of that week. Quick reference.
Color Name Finder - Online Hex to Name Dictionary
Find the official name of any hex color from the extended color dictionary. Search by name to get the hex code. Handy for CSS and design language.
Marine VHF Channel Guide – Online Quick Reference by Region
Select region (US, Canada, International) and see channel frequencies and usage (distress, bridge). Boating safety.
Lyrics Finder - Online Song Lyrics Search Tool
Enter a song title and artist to find lyrics using public APIs. Quick preview and copy. A lightweight tool for music lovers.
npm Version Range Checker - Online SemVer & Tilde Caret
Enter a package name and version range to see all satisfying versions from the registry. Understand ^ and ~.
LEGO Color Chart & Hex Reference – Online BrickLink Colors
Browse all official LEGO colors with names, years, and hex codes. Sort by hue. Perfect for builders.
Bruise Color Timeline – Online Reference Healing Stages
Visual chart showing the typical colors a bruise goes through from red to yellow. Educational only.
Planetary Fact Sheet - Online Solar System Stats
Click a planet to see mass, diameter, moons, temperature, and distance from sun. Beautifully styled static data.
Knot Strength Efficiency Guide – Online Visual Weakness Chart
Compare common knots by their efficiency percentage and residual strength. Interactive chart with animated diagrams.
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.
What Font is Used on a Website - Online Detector
Enter a URL and extract the font stacks and web font URLs used on that page. Quick typography research.
Alphabet of Elements - Online A‑Z by Chemistry Symbol
See all elements sorted alphabetically by symbol. Picture and atomic weight. Beautifully styled static list.
ASCII Table - Online Character Code Reference
Interactive ASCII table showing decimal, hex, octal, and binary codes for all standard and extended ASCII characters. A classic programmer reference.
UV Index Reference - Online Exposure Category & Protection
See the current UV index forecast or enter a value to learn protection needed (SPF, hat, shade). Educational.
F‑Stop Calculator - Online Aperture & Depth of Field Reference
Learn about f‑stops and their effect on light and depth. Calculate equivalent exposure adjustments. Educational.
Recent Earthquake Tracker - Online USGS Live Data Map
View recent earthquakes worldwide on a map. Fetches public USGS GeoJSON feed directly from browser. Real-time data.
Hijri to Gregorian Date Converter - Online Islamic Calendar
Convert between Gregorian and Hijri (Islamic) dates. Approximate visual reference. Local algorithm.
Daylight Length Calculator - Online Sunrise Sunset Duration
For any latitude and date, calculate the exact daylight hours. See golden hour. Useful for gardening and travel.
Currency Symbol Lookup - Online Find $ € ¥
Search by country or currency name to find its symbol and code. Quick static reference for international business.
Decibel Level Reference – Online Common Sound Examples
Interactive scale showing dB levels of everyday sounds with playable samples. Hearing safety.
ISBN Validator - Online Check ISBN‑10 & ISBN‑13
Validate ISBN‑10 and ISBN‑13 numbers and compute their check digits. Useful for booksellers and libraries. All local.
Supplement Half‑Life Reference – Online Vitamin D, B12 Chart
Reference for how long common supplements stay in the body. Inform taking frequency.
pH Scale Explorer - Online Interactive Acid Base Chart
Drag a slider along the pH scale to see examples of solutions at that pH and the concentration of H⁺ and OH⁻ ions.
Polygon Name Finder - Online How Many Sides?
Enter a number of sides (3‑100) and get the correct polygon name (triangle, hectogon). Fun geometry reference.
Easter Date Finder - Online Computus Algorithm for Any Year
Find the date of Easter Sunday for any given year. Learn about the computus algorithm. Simple and accurate.
Semaphore Flag Translator - Online Signal Code Converter
Translate text into semaphore flag positions and decode semaphore back to letters. Interactive animated flags. For scouts and maritime fans.
Periodic Table Explorer - Online Element Facts & 3D Model
Browse a beautifully designed periodic table with electron shell visualization and key facts. Click any element to learn more. Offline ready.
Cooking Oil Smoke Point Reference – Online Interactive Chart
Sortable list of cooking oils with smoke points and best uses. Choose the right fat for the right heat.
Flame Test Colors - Online Element Identification Chart
Click a metal ion to see the characteristic flame color and wavelength. Useful for analytical chemistry reference.
Crypto Price Ticker - Online Live Bitcoin & Ethereum
Live cryptocurrency prices from public APIs. Clean ticker with percentage changes. Pure frontend, no account needed.
Font Awesome Cheatsheet - Online Icon Search & Copy
Browse and search all Font Awesome 6 icons with preview, class name, and unicode. Copy the HTML snippet. Perfect for web developers.
ISO Currency Code Lookup - Online Search by Country
Find the three‑letter currency code (USD, EUR, JPY) for any country. Also lists currency symbol and name. Static.
ISS Tracker - Online Live Where is Space Station
See the International Space Station’s current position on a world map in real time. Uses public API. No refresh.
Acronym Finder - Online Decode Abbreviations & Slang
Look up common acronyms and abbreviations from a built-in list. Search by acronym or meaning. Always expanding, no internet needed.
HTML Color Names - Online Complete List with Hex & Preview
A complete, searchable list of all 140+ named HTML/CSS colors with their hex codes and color previews. Click to copy code. Essential web reference.
Schmidt Sting Pain Index Explorer – Online Insect Ratings
Interactive list of stinging insects ranked by pain level with descriptions. Fascinating entomology.
Browser Font Stacks Explorer - Online Defaults Per OS
See which fonts map to generic families (serif, sans‑serif, monospace) on different operating systems. A handy reference.
Acronym Expander - Online Find What It Stands For
Enter an acronym and see its most common full forms. Static dictionary. No internet needed after load.
Unicode Blocks Browser - Online Explore All Scripts
Browse Unicode by block: Latin, Cyrillic, CJK, Emoticons. See characters and copy with a click. Full reference.
Bird Sound Reference - Online Listen & Identify Common Calls
Browse a collection of common bird calls. Play short audio samples to identify birds you hear. Educational static data.
User Agent Style Sheet Explorer - Online See Default CSS
Browse the built‑in styles that browsers apply to HTML elements. Understand why your page looks different. Static reference.
Seam Allowance Chart – Online Metric & Imperial Quick Ref
Visual reference for common seam allowances (1/4″, 5/8″, etc.) with actual size on screen. Essential sewing aid.
Historical Cameras Timeline - Online Photography Evolution
Scroll through an interactive timeline of cameras from camera obscura to modern DSLR. Photos and facts.
Ethernet Cable Color Code - Online RJ45 T568A/B Wiring
Interactive guide to crimping RJ45 connectors. See the wire order for T568A/B standards. Helpful for DIY network cables.
Sublimation Press Time Calculator – Online Mug/T‑Shirt
Look up recommended time and temperature for various sublimation blanks. Quick reference.
Units of Measurement Reference - Online Quick Guide
Search and browse a comprehensive table of SI units and common imperial conversions. For students and engineers.
Rock Cycle Interactive Diagram - Online Geology Model
Click through the rock cycle to see how each rock type transforms into another. Animated arrows and descriptions.
Keyboard Shortcuts Viewer - Online Your Browser & OS Keys
Display a dynamic list of keyboard shortcuts for the current browser and operating system. Filter by category. Keep it open for reference.
Country Facts - Online Quick Nation Info & Flag Tool
Look up quick facts about any country: capital, population, currency, flag, and continent. Static data, fast search. Great for travel and education.
International Dialling Code Reverse Lookup - Online Country by Code
Enter a dialling code (+44, +1) to find which country it belongs to. Also search by country name. Static reference.
Electron Configuration Writer - Online Orbital Diagram Tool
Get the full electron configuration and orbital box diagram for any element. Learn the Aufbau principle. Fast and local.
Docker Commands Cheatsheet - Online Quick Reference
A searchable list of essential Docker CLI commands for managing containers, images, and volumes. Copy-paste friendly. Always handy.
Git Cheatsheet - Online Common Commands Reference
Quick reference for frequently used Git commands with examples. Searchable and categorized. A handy resource for all developers.
Ham Radio Q-Codes Cheatsheet – Online Quick Reference
Searchable list of Q-codes with meanings. Also includes RST system. Prepare for license.
Emoji Slang Dictionary - Online Interpret Hidden Meanings
Look up what certain emojis really mean in texting (e.g., 🍆, 💀). Fun and educational for parents and newbies.
Named HTML Entities Reference - Online Quick Chart
Searchable grid of all named HTML character entities with previews. Click to copy &, <, © etc. For web devs.
Week Number Finder - Online ISO Week of Year
Enter any date and get the ISO week number. Also shows start and end of that week. Handy for project planning.
Etymology Quick Lookup - Online Word Origin Reference
Enter an English word to get a brief etymology (Latin, Greek, etc.) and root meaning. From curated static data.