Word Origin Dictionary - Online Quick Etymology Lookup
Enter an English word to get a quick etymology. From a curated list of common roots. Learn language history.
UD5 Toolkit
Uncover the fascinating origins of English words — instantly.
Enter an English word to get a quick etymology. From a curated list of common roots. Learn language history.
Interactive scale showing dB levels of everyday sounds with playable samples. Hearing safety.
Searchable list of Q-codes with meanings. Also includes RST system. Prepare for license.
Enter a URL and extract the font stacks and web font URLs used on that page. Quick typography research.
See which fonts map to generic families (serif, sans‑serif, monospace) on different operating systems. A handy reference.
Offline‑first search of the CanIUse database. Type a CSS property, HTML element, or API and see global support percentages. Fast.
Browse the built‑in styles that browsers apply to HTML elements. Understand why your page looks different. Static reference.
Search by country or city to find the capital. Full offline list. Useful for homework or travel planning. Static data.
Search and browse a comprehensive table of SI units and common imperial conversions. For students and engineers.
Search by country or currency name to find its symbol and code. Quick static reference for international business.
A clean, printable Morse code chart with letters, numbers, and common punctuation. Learn and decode easily. Static.
An interactive reference for regular expression tokens. Click a token to see its explanation and example. Learn regex faster.
Look up what certain emojis really mean in texting (e.g., 🍆, 💀). Fun and educational for parents and newbies.
Searchable grid of all named HTML character entities with previews. Click to copy &, <, © etc. For web devs.
A visual guide to common copy‑editing and proofreading symbols. Click a mark to see its meaning. For writers.
Searchable table of well‑known TCP and UDP ports with their services. Check 80, 443, 3306, and many more.
Compare your password against a built‑in list of the 10,000 most common passwords. Instant warning if it appears.
Reference diagrams for USB‑A, USB‑C, micro‑USB pinouts. See wire colors and signal descriptions. Hardware hacking helper.
See the current UV index forecast or enter a value to learn protection needed (SPF, hat, shade). Educational.
Enter a number of sides (3‑100) and get the correct polygon name (triangle, hectogon). Fun geometry reference.
Click a planet to see mass, diameter, moons, temperature, and distance from sun. Beautifully styled static data.
Scroll through thousands of pre‑computed digits of π. Search for a specific string of digits. For math lovers.
Enter a word and get a list of perfect and near rhymes. Categorized by syllable count. Useful for songwriting and poems. Static data, local.
A searchable list of essential Docker CLI commands for managing containers, images, and volumes. Copy-paste friendly. Always handy.
Quick reference for frequently used Git commands with examples. Searchable and categorized. A handy resource for all developers.
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.
Look up quick facts about any country: capital, population, currency, flag, and continent. Static data, fast search. Great for travel and education.
Browse and copy common mathematical symbols, Greek letters, and operators. Includes LaTeX codes for use in documents. Quick reference for students.
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.
Interactive ASCII table showing decimal, hex, octal, and binary codes for all standard and extended ASCII characters. A classic programmer reference.