UD5 Toolkit
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.
US States & Capitals Quiz - Online Geography Game
🇺🇸 US States & Capitals Quiz
Test your geography knowledge instantly
0/20
Loading...
Live Statistics
Correct:
0
0
Wrong:
0
0
Streak:
0
0
Best Streak:
0
0
Best Score (20Q): --
Frequently Asked Questions
It's a free interactive geography game that tests your knowledge of all 50 US states and their capital cities. You can choose between guessing the capital from a state name or identifying the state from a capital name.
Simply read the question and click one of the four answer buttons. You'll get instant feedback – green for correct, red for wrong. Your score, streak and best performance are tracked live. Switch modes anytime and reset to start a new round.
Two modes: State → Capital (e.g., "What is the capital of Texas?") and Capital → State (e.g., "Which state has the capital Austin?"). Click "Switch Mode" to toggle.
Yes! Use the dropdown next to "Questions:" to select 10, 20, 30, or all 50 states. Your quiz will reset with the new total. Your high score is saved separately for each question count and mode.
Every round shuffles the question order and randomly selects incorrect options from the remaining states/capitals, so you'll never get the same experience twice.
Your best score for the selected mode and question count is stored in your browser (localStorage). High scores persist until you clear browser data. Live statistics reset when you start a new round.
Absolutely! The interface is fully responsive and works great on smartphones and tablets. Large buttons and clear layouts ensure a smooth experience on any device.
Country Outline Quiz - Online Identify by Shape
A silhouette of a country appears; type the name. Timed guesses. Great for geography buffs.
Country Flag Quiz by Shape - Online Guess the Nation
See a flag and pick the country among four choices. Timed rounds with score. Perfect for geography buffs. Local data.
Country Silhouette Quiz - Online Identify Nation by its Outline
A country border shape appears, guess the nation. Multiple choice. Score tracking. Learn geography visually. Local SVG shapes.
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.
ISO Currency Code Lookup - Online Search by Country
Find the three‑letter currency code (USD, EUR, JPY) for any country. Also lists currency symbol and name. Static.
CSS Selectors Game - Online Train with Restaurant Menu
Practice CSS selectors by targeting plates on a virtual restaurant table. 30+ levels. Perfect for beginners.
Connect Four - Online PvP & AI Board Game
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.
Date Calculator - Online Add & Subtract Days, Weeks, Months
Add or subtract days, weeks, and months to find a future or past date. Also compute duration between two dates. Essential for project planning.
CSS Grid Alignment Playground - Online Place & Align Tracks
Practice aligning grid items and tracks with the place‑items, align‑content, and justify‑content properties. Visual guide.
HTML Headings Outline Generator - Online From Webpage
Enter a URL and see a nested list of all headings (h1‑h6). Check your document structure for SEO and accessibility. Pure fetch.
Developmental Milestones Quiz – Online Ages & Stages Fun
Answer questions and see typical milestones for 0-5 years. Educational reference for parents. Not a diagnostic tool.
position: sticky Playground - Online Sticky Headers & Footers
Scroll a container and see how sticky elements behave. Adjust top, bottom, and scroll margins. Copy the code.
Service Worker Cache Strategy Tester - Online Simulator
Simulate different cache strategies (Cache First, Network First, Stale‑While‑Revalidate) and see responses. Learn offline patterns.
Heading Structure Visualizer - Online Document Outline Check
Paste an URL or HTML and see the h1‑h6 hierarchy as a tree. Detect skipped levels and improve accessibility. Client‑side.
CSS Grid Overlap Demo - Online Layered Layout Techniques
Place multiple grid items into the same cells to create overlapping layouts. Learn the technique visually. Copy code.
Time Between Dates Calculator - Online Years, Months, Days Count
Calculate exact elapsed time between two dates in years, months, weeks, and days. Countdown or time already passed. Simple, visual, and local.
SSML Marker Demo - Online TTS Events & Highlights
Use SSML <mark> tags to fire events during TTS. See text highlighted as it is spoken. Understand speech synthesis timing. local.
Playwright Test Skeleton - Online Script Boilerplate
Create a basic Playwright script with browser launch, page navigation, and screenshot. Start E2E testing instantly.
Blood Pressure Log - Online Track & Chart Readings
Record daily systolic/diastolic readings and pulse. See a trend chart. All data saved locally in your browser.
Tetris Game - Online Classic Block Puzzle
Enjoy classic Tetris in your browser. Rotate, move, and drop tetrominoes. Clear lines and score. Fully local JavaScript.
SVG Path D to Array – Online Extract Coordinates
Paste an SVG path d string and parse it into an array of commands and coordinates. Useful for animations.
Week Number & Start/End Dates - Online ISO 8601
Enter any date and get its ISO week number, plus the start and end dates of that week. Quick reference.
Sleep Log Tracker - Online Record Hours & Quality
Log the hours you slept each night and rate the quality. See a weekly bar chart. Local storage.
SQL CREATE TABLE to CSV Header - Online Column Lister
Paste a SQL CREATE TABLE statement and extract just the column names as a CSV header row. For data migration.
Simple Time Tracker - Online Project & Task Hours Logger
Start/stop timer per project to log hours. See daily and weekly totals. Data stays in localStorage. Export summary as CSV. No account needed.
CSS Baseline Grid Overlay - Online Typography Rhythm
Generate a CSS background that shows a baseline grid. Adjust line‑height and offset. Perfect for aligning text.
Base58 Encoder & Decoder - Online Bitcoin-Style Address Tool
Encode or decode data to/from Base58 (Bitcoin alphabet). Useful for cryptocurrency address generation testing. Fully local, no data sent.
CSS Grid Baseline Alignment Demo - Online Typography Sync
See how align‑items: baseline works in grid to align different font sizes on the same baseline. Visual guide.
Background Sync API Tester - Online Offline Queue
Register a one‑off background sync and see it fire when connectivity returns. Debug service worker sync logic.