World Flag Quiz - Online Guess the Country by Flag
Random world flags shown; pick the correct country name from four choices. Score and streak. Learn geography.
UD5 Toolkit
Test your knowledge with fun random trivia! Pick a category, choose difficulty, and quiz yourself.
Random world flags shown; pick the correct country name from four choices. Score and streak. Learn geography.
See a flag and pick the country among four choices. Timed rounds with score. Perfect for geography buffs. Local data.
Test your knowledge of world capitals. Multiple choice, timed rounds. Improve your geography skills. No data collection.
Interactive quiz to learn all 50 US state capitals. Choose mode: capital to state or state to capital. Map highlight available. Works offline.
A silhouette of a country appears; type the name. Timed guesses. Great for geography buffs.
Test your knowledge: given a state name, pick its capital. Timed, with scoreboard. Learn all 50. No login.
Generate a unique and humorous campsite name for your tent. Great for scout trips or backyard camping.
Play the classic Connect Four in your browser against a friend or CPU. Drop discs to get four in a row. Clean SVG board, local logic.
A country border shape appears, guess the nation. Multiple choice. Score tracking. Learn geography visually. Local SVG shapes.
Enter your hand and dealer's up card to see optimal move (hit, stand, double, split) using basic strategy. Educational casino reference.
Paste a hex code and get the closest official CSS color name and a list of similar Pantone-like shades. Design reference.
Structure your episode with timed segments. Includes call to action notes. Export as text.
Find the threeβletter currency code (USD, EUR, JPY) for any country. Also lists currency symbol and name. Static.
Calculate exact elapsed time between two dates in years, months, weeks, and days. Countdown or time already passed. Simple, visual, and local.
Enter the song's key and playing position (straight/cross harp) to determine which harmonica key to use.
Enter two dates and see the exact number of days, weeks, and workdays between them. Also shows the countdown or days since.
Calculate the exact number of days, weeks, months, and workdays between two dates. Visual calendar highlights. Perfect for projects.
Paste a SQL CREATE TABLE statement and extract just the column names as a CSV header row. For data migration.
Fill in a thesis statement, arguments, evidence, and get a structured essay outline. Print.
Paste an URL or HTML and see the h1βh6 hierarchy as a tree. Detect skipped levels and improve accessibility. Clientβside.
Drop a PDF and automatically detect tables. Export them to CSV or copy to clipboard. Works locally using PDF.js.
Drag a slider along the pH scale to see examples of solutions at that pH and the concentration of HβΊ and OHβ» ions.
Seamlessly convert JSON objects into valid XML documents. Control root element naming and attribute formatting. Entirely local, keeping your data safe.
Paste an SVG path d string and parse it into an array of commands and coordinates. Useful for animations.
Calculate the bearing (azimuth) and distance between two GPS coordinates using the Haversine formula. Great for orienteering. Local only.
Select project type and leather weight to get recommended stitch spacing and thread size.
Encode or decode data to/from Base58 (Bitcoin alphabet). Useful for cryptocurrency address generation testing. Fully local, no data sent.
Enter the correct answer and accept player entries. Highlights correct ones. Simple scorekeeper for home trivia.
Randomly show a Q-code and select correct meaning. Learn while having fun. For your license exam.
Hear a common bird song and choose the correct species from multiple choices. Ear training for birders.