UD5 Toolkit
Poison Control Reference – Online US Hotline & Ingredient Lookup
Displays the national poison control number and basic first steps for common household ingestions. Seek medical help immediately.
Tag: Reference Tables - Quick Lookup
45+ toolsStatute of Limitations Lookup – Online Reference by US State
Select a US state and legal category (debt, personal injury) to see typical time limits. Quick informational guide.
Teething Symptoms Reference – Online Timeline & Relief Ideas
Understand teething order, typical symptoms, and safe relief methods. Charts and tips for new parents. Educational, not medical advice.
TLD & Domain Extension Lookup - Online All Endings
Search a complete list of all top‑level domains. See which still have availability. For brand naming. Static reference.
Public Holidays Calendar - Online All Countries
Select a country and year to see every public holiday. Static data for major countries. Plan your vacations.
CSS Cursor Playground - Online Preview All Pointer Styles
Hover over tiles to see every CSS cursor value in action. Quick visual reference for choosing the right UI feedback.
HTTP Headers Reference - Online Search & Descriptions
Browse a searchable list of standard HTTP request and response headers with explanations. Quick dev help.
JavaScript Regex Cheatsheet - Online Interactive Pattern Reference
Interactive cheatsheet for JavaScript regular expressions with live examples. Click any token to see its explanation and test it on sample text immediately.
BMI Chart & Ideal Weight Table - Online Reference
Look at a color‑coded BMI table for your height and see the healthy weight range. Simple reference.
All Emojis Showcase - Online Browse & Copy Full Set
View every standard emoji in a searchable grid. Hover to see a larger preview. Click to copy. Updated with Unicode 16.
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.
Hex Color to Name Finder - Online Identify Closest Hue
Paste a hex code and get the closest official CSS color name and a list of similar Pantone-like shades. Design reference.
Color to Emotion Reference - Online Psychology Quick Guide
Click any color to see common emotional associations and cultural meanings. Quick design reference.
HTTP Status Code Reference - Online Search & Meanings
Look up any HTTP status code and see its meaning, RFC reference, and example. Full offline reference.
CSS Cursor Demo - Online Preview All Pointer Styles
Hover over tiles to see every CSS cursor value in action. Quick visual reference for choosing the right UI feedback.
Named CSS Colors Explorer - Online Preview All 148
Grid of all 148 named CSS colors. Hover to see detail, click to copy the name or hex. Essential frontend reference.
Decibel Level Reference – Online Common Sound Examples
Interactive scale showing dB levels of everyday sounds with playable samples. Hearing safety.
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.
CanIUse Quick Search - Online Browser Support Lookup
Offline‑first search of the CanIUse database. Type a CSS property, HTML element, or API and see global support percentages. Fast.
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.
Morse Code Cheatsheet - Online Printable Reference
A clean, printable Morse code chart with letters, numbers, and common punctuation. Learn and decode easily. Static.
World Capitals List & Search - Online Reference
Search by country or city to find the capital. Full offline list. Useful for homework or travel planning. Static data.
Currency Symbol Lookup - Online Find $ € ¥
Search by country or currency name to find its symbol and code. Quick static reference for international business.
File Extension Database Lookup - Online Search Type
Search for any file extension to see its full name, MIME type, and description. Covers thousands of entries. Static data.
Famous Brand Colors - Online Quick Reference Palette
Search a library of famous company brand colors with hex codes. Copy any color instantly. For designers and marketers.
Proofreading Marks Reference - Online Editors' Cheat Sheet
A visual guide to common copy‑editing and proofreading symbols. Click a mark to see its meaning. For writers.
USB 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.
Units of Measurement Reference - Online Quick Guide
Search and browse a comprehensive table of SI units and common imperial conversions. For students and engineers.
Named HTML Entities Reference - Online Quick Chart
Searchable grid of all named HTML character entities with previews. Click to copy &, <, © etc. For web devs.
Interactive Regex Cheatsheet - Online Quick Reference
An interactive reference for regular expression tokens. Click a token to see its explanation and example. Learn regex faster.
TCP/UDP Port List - Online Common Service Reference
Searchable table of well‑known TCP and UDP ports with their services. Check 80, 443, 3306, and many more.
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.
Food Alternative Finder - Online Substitute Ingredient Lookup
Type a common ingredient and get possible substitutes with ratios. Perfect for emergency cooking. Static reference.
MIME Type ↔ Extension Lookup - Online Quick Reference
Search by MIME or file extension to see the corresponding type. Helpful when configuring web servers. Static.
Planetary Fact Sheet - Online Solar System Stats
Click a planet to see mass, diameter, moons, temperature, and distance from sun. Beautifully styled static data.
Math Symbols Reference - Online Copy & Paste LaTeX
Browse and copy common mathematical symbols, Greek letters, and operators. Includes LaTeX codes for use in documents. Quick reference for students.
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.
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.
HTTP Status Codes Reference - Online Quick Cheat Sheet
A complete reference of HTTP status codes with explanations. Search and filter by code or category. Useful for API developers and web debugging. Static and fast.
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.
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.
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.
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.
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.