US States & Capitals Quiz - Online Geography Memory Game
Interactive quiz to learn all 50 US state capitals. Choose mode: capital to state or state to capital. Map highlight available. Works offline.
UD5 Toolkit
Test your geography knowledge instantly
Interactive quiz to learn all 50 US state capitals. Choose mode: capital to state or state to capital. Map highlight available. Works offline.
Test your knowledge of world capitals. Multiple choice, timed rounds. Improve your geography skills. No data collection.
A silhouette of a country appears; type the name. Timed guesses. Great for geography buffs.
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.
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.
Paste an URL or HTML and see the h1‑h6 hierarchy as a tree. Detect skipped levels and improve accessibility. Client‑side.
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.
Calculate the bearing (azimuth) and distance between two GPS coordinates using the Haversine formula. Great for orienteering. Local only.
Generate a unique and humorous campsite name for your tent. Great for scout trips or backyard camping.
Enter your hand and dealer's up card to see optimal move (hit, stand, double, split) using basic strategy. Educational casino reference.
Calculate exact elapsed time between two dates in years, months, weeks, and days. Countdown or time already passed. Simple, visual, and local.
Paste an SVG path d string and parse it into an array of commands and coordinates. Useful for animations.
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.
Enter two dates and see the exact number of days, weeks, and workdays between them. Also shows the countdown or days since.
Drag a slider along the pH scale to see examples of solutions at that pH and the concentration of H⁺ and OH⁻ ions.
Structure your episode with timed segments. Includes call to action notes. Export as text.
Fill in a thesis statement, arguments, evidence, and get a structured essay outline. Print.
Encode or decode data to/from Base58 (Bitcoin alphabet). Useful for cryptocurrency address generation testing. Fully local, no data sent.
Seamlessly convert JSON objects into valid XML documents. Control root element naming and attribute formatting. Entirely local, keeping your data safe.
Select project type and leather weight to get recommended stitch spacing and thread size.
Paste a hex code and get the closest official CSS color name and a list of similar Pantone-like shades. Design reference.
Enter the song's key and playing position (straight/cross harp) to determine which harmonica key to use.
Drop a PDF and automatically detect tables. Export them to CSV or copy to clipboard. Works locally using PDF.js.
Answer 5 silly questions and get a fruit personality result with a description. Harmless fun, local only.
Show a word and guess the correct translation, but watch out for false friends. Avoid embarrassment.
Drag dog breed names into the correct AKC group (herding, sporting, etc.). Learn breed categories.