UD5 Toolkit
Decibel Level Reference – Online Common Sound Examples
Interactive scale showing dB levels of everyday sounds with playable samples. Hearing safety.
Morse Code Cheatsheet - Online Printable Reference
Morse Code Cheatsheet
International Morse Code — Printable Reference & Interactive Guide
Text to Morse Code
Your morse code will appear here...
Letters A–Z
Numbers 0–9
Punctuation Symbols
Frequently Asked Questions
Ham Radio Q-Codes Cheatsheet – Online Quick Reference
Searchable list of Q-codes with meanings. Also includes RST system. Prepare for license.
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.
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.
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 Oscillator & Key - Online Practice CW
Use your keyboard or mouse as a straight key. Hear the tone and see the dots/dashes. Perfect for learning CW. Local.
Units of Measurement Reference - Online Quick Guide
Search and browse a comprehensive table of SI units and common imperial conversions. For students and engineers.
Currency Symbol Lookup - Online Find $ € ¥
Search by country or currency name to find its symbol and code. Quick static reference for international business.
Named HTML Entities Reference - Online Quick Chart
Searchable grid of all named HTML character entities with previews. Click to copy &, <, © etc. For web devs.
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.
Morse Code Ringer - Online Custom SMS Alert Pattern
Create a custom vibration or beep pattern from a short Morse code message. Design unique ringtone ideas.
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.
Morse Code Key Trainer - Online Straight Key Simulator
Practice sending Morse code using a virtual straight key. Visual feedback and audio tone. Learn timing and proper fist.
Simple Budget Worksheet - Online Monthly Income Expense
Fill out a clean budget worksheet with income and expense categories. See totals and print. No data stored.
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.
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.
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.
Planetary Fact Sheet - Online Solar System Stats
Click a planet to see mass, diameter, moons, temperature, and distance from sun. Beautifully styled static data.
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.
Crossword Builder - Online Create & Solve Simple Puzzles
Build a small crossword by adding words and clues. Export as a printable grid or solve in browser. Perfect for classrooms.
Word Search Creator - Online Generate & Print Puzzle
Enter a list of words and create a custom word search grid. Choose difficulty, print or export as PDF. Great for teachers.
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.
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.
Text to Morse Code Decoder - Online CW Translation Tool
Translate text to Morse code with audio playback. Adjust speed and tone. An educational tool for amateur radio enthusiasts. Works offline.
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.
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.
Simple Invoice Generator - Online Create & Print Invoices Free
Fill in your details and generate a professional-looking invoice ready to print or save as PDF. No sign-up, all data stays on your device. Great for freelancers.
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.
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.