UD5 Toolkit
Aromatherapy Blend Finder – Essential Oil Combos by Need
Select a desired effect (relaxation, focus, energy) and get a suggested essential oil blend with drop ratios. Perfect for diffusers and DIY massage oils.
Reference Guides - Cheat Sheets
99+ toolsPollen Calendar Reference – Online Month‑by‑Month Plant Guide
Select your region and see a static calendar of common pollen seasons. Informative for allergy sufferers.
Cultural Do's & Don'ts Quick Reference – Online by Country
Select a country to see a concise list of cultural norms, greetings, and taboos. Be a respectful traveler.
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.
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.
SDS Chemical Safety Lookup – Online Section Reference
Enter a common chemical name to see summary hazard pictograms and precautions. Quick reference.
UV Index Lookup - Online Current Sun Strength by City
Enter a city to get current UV index forecast using open data (with local caching). Understand sun protection needs. No personal location used.
Public Holidays Calendar - Online All Countries
Select a country and year to see every public holiday. Static data for major countries. Plan your vacations.
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.
Food Storage Shelf Life Directory – Online How Long Does It Last?
Look up storage times for pantry, fridge, and freezer items. Reduce food waste. Local database.
Blanket Size Chart – Online Crib, Throw, King Dimensions
Reference for standard blanket and afghan sizes in inches and cm. Perfect for knitters and crocheters.
UK Tax Code Checker - Online Understand Your Code
Enter your UK tax code and see an explanation of what the numbers and letters mean. Simple educational reference. No data stored.
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.
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.
Tailwind Color Palette Viewer - Online See All 22 Palettes
Browse every Tailwind default color palette side by side. Click any shade to copy the hex or class. For rapid design.
Currency Code to Symbol Converter - Online ISO 4217 Lookup
Enter a three‑letter currency code like USD or EUR and instantly see the corresponding symbol and number of decimals. Quick developer reference.
Time Zone Offset Lookup - Online UTC ± Hours City
Search a city or country and see its current UTC offset, DST status, and abbreviation. Quick reference for scheduling.
Coffee Roast Profile Color Meter – Online Agtron Number Estimator
Select roast level (cinnamon, city, full city, etc.) and see approximated Agtron color value and bean temperature.
Fraction to Decimal Conversion Chart – Online Quick Reference
Interactive table showing common fractions and their decimal/percentage equivalents. Click to highlight.
Statute 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.
Meat Doneness Temperature Guide - Online Reference for Beef, Chicken, Pork
Select meat type and see USDA recommended internal temperatures for rare to well-done. Simple reference chart. Local, no upload.
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.
Color to Emotion Reference - Online Psychology Quick Guide
Click any color to see common emotional associations and cultural meanings. Quick design reference.
HTML Color Input Explorer - Online Native Picker & Events
Use <input type='color'> and see its change events and value in hex. Understand the native color picker. Quick demo.
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.
Pregnancy Week by Week Size – Online Fruit Comparison
Enter gestational week to see baby's approximate size compared to a fruit/veg. Visual fun.
Fracture Healing Time Reference – Online Average by Bone
Select a bone and see typical healing duration in weeks. Educational information only.
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.
Australia Public Holiday Checker - Online by State & Year
Select a state and year to see all public holidays. Works offline with built-in data. Plan your long weekends. Simple reference tool.
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.
HTTP Headers Reference - Online Search & Descriptions
Browse a searchable list of standard HTTP request and response headers with explanations. Quick dev help.
Historical Figures Timeline - Online Interactive Life Spans
See famous people's life spans on a draggable timeline. Compare who was alive at the same time. Educational fun.
Saponification Value Lookup – Online Oils & Butters
Search for the NaOH and KOH sap values of various oils. Reference for cold process soap makers.
Schmidt Sting Pain Index Explorer – Online Insect Ratings
Interactive list of stinging insects ranked by pain level with descriptions. Fascinating entomology.
Sublimation Press Time Calculator – Online Mug/T‑Shirt
Look up recommended time and temperature for various sublimation blanks. Quick reference.
Companion Planting Guide – Online Garden Friend/Foe Checker
Select a vegetable and see its best companion plants and which to avoid. Visual grid with quick reference. Improve garden yield and health naturally.
Ingredient Substitution Finder - Online What to Use Instead
Search for common ingredient substitutions (e.g., buttermilk, egg, cornstarch). Quick reference for when you're missing something. Local data.
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.
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.
Yoga Pose Library - Online Browse & Learn Asanas
Searchable catalog of yoga poses with illustrations, instructions, and benefits. For beginners and teachers. Static resource.
HTML Input Type Playground - Online Test All Fields
See every HTML input type in one page. Check browser support and styling. Copy sample markup. Quick frontend reference.
Moon Phase & Illumination – Online Exact Percent Tonight
Shows today's moon phase, age, and percent illuminated. Simple visual display. Works offline.
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.
Carabiner kN Rating Checker - Online Safety Converter
Convert carabiner strength from kN to kg/lbs and understand Major Axis vs Minor Axis markings. Quick educational reference for climbers.
Paper Size Converter - Online A4, Letter, Legal Dimensions
See exact mm and inch dimensions of ISO A-series and US paper sizes. Visual comparison tool. Also calculates weight based on GSM and dimensions.
HTTP Status Code Reference - Online Search & Meanings
Look up any HTTP status code and see its meaning, RFC reference, and example. Full offline reference.
<datalist> Autocomplete Tester - Online ComboBox Demo
See how <datalist> works across browsers. Test with many options. Copy the minimal markup. Simple native autocomplete.
Ham Radio Q-Codes Cheatsheet – Online Quick Reference
Searchable list of Q-codes with meanings. Also includes RST system. Prepare for license.
Sunrise Sunset Times - Online Any Location
Enter a city name or coordinates and see today's sunrise, sunset, and twilight times. Approximate algorithm. Local.
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.
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.
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.
Marine VHF Channel Guide – Online Quick Reference by Region
Select region (US, Canada, International) and see channel frequencies and usage (distress, bridge). Boating safety.
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.
HTML Symbol Entities Cheatsheet - Online Search & Copy
Search and copy HTML entities for arrows, math, currency, and symbols. See the glyph and code. Fast reference.
Morse Code Cheatsheet - Online Printable Reference
A clean, printable Morse code chart with letters, numbers, and common punctuation. Learn and decode easily. Static.
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.
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.
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.
Brake Rotor Size Calculator - Online Car Maintenance
Enter your car's make and model to find the minimum and maximum rotor thickness specs. Static lookup table. Local reference.