US States & Capitals Quiz - Online Geography Game
Test your knowledge: given a state name, pick its capital. Timed, with scoreboard. Learn all 50. No login.
UD5 Toolkit
Test your knowledge: given a state name, pick its capital. Timed, with scoreboard. Learn all 50. No login.
Interactive quiz to learn all 50 US state capitals. Choose mode: capital to state or state to capital. Map highlight available. Works offline.
Random world flags shown; pick the correct country name from four choices. Score and streak. Learn geography.
A silhouette of a country appears; type the name. Timed guesses. Great for geography buffs.
See a flag and pick the country among four choices. Timed rounds with score. Perfect for geography buffs. Local data.
A country border shape appears, guess the nation. Multiple choice. Score tracking. Learn geography visually. Local SVG shapes.
Click for a random general knowledge question, then reveal the answer. Covers science, history, pop culture.
Find the three‑letter currency code (USD, EUR, JPY) for any country. Also lists currency symbol and name. Static.
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.
Generate a unique and humorous campsite name for your tent. Great for scout trips or backyard camping.
Paste an URL or HTML and see the h1‑h6 hierarchy as a tree. Detect skipped levels and improve accessibility. Client‑side.
Seamlessly convert JSON objects into valid XML documents. Control root element naming and attribute formatting. Entirely local, keeping your data safe.
Drag a slider along the pH scale to see examples of solutions at that pH and the concentration of H⁺ and OH⁻ ions.
Paste a SQL CREATE TABLE statement and extract just the column names as a CSV header row. For data migration.
Encode or decode data to/from Base58 (Bitcoin alphabet). Useful for cryptocurrency address generation testing. Fully local, no data sent.
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.
Calculate exact elapsed time between two dates in years, months, weeks, and days. Countdown or time already passed. Simple, visual, and local.
Calculate the exact number of days, weeks, months, and workdays between two dates. Visual calendar highlights. Perfect for projects.
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.
Enter two dates and see the exact number of days, weeks, and workdays between them. Also shows the countdown or days since.
Enter the song's key and playing position (straight/cross harp) to determine which harmonica key to use.
Fill in a thesis statement, arguments, evidence, and get a structured essay outline. Print.
Drop a PDF and automatically detect tables. Export them to CSV or copy to clipboard. Works locally using PDF.js.
Select project type and leather weight to get recommended stitch spacing and thread size.
Enter the correct answer and accept player entries. Highlights correct ones. Simple scorekeeper for home trivia.
Answer 5 silly questions and get a fruit personality result with a description. Harmless fun, local only.
Randomly show a Q-code and select correct meaning. Learn while having fun. For your license exam.