📊 Data & Reference
Country info, trivia, quotes, and facts — 23 free tools available. No signup required.
Reference lookups and general-knowledge tools — country data, postal codes, time zones, and a couple of quizzes.
The reference tools here are built on bundled, citable datasets rather than live scraping where that is possible. Country data comes from a version-controlled open dataset combined with World Bank population figures; flag images are bundled and served from this site. That makes the answers reproducible and stops a page breaking when a third-party API disappears, which has happened to several that tools like these used to rely on.
Where a tool does depend on a live service, the page says which one and what happens when it is unavailable.
Where to start
- Country Information Lookup — Population, capital, currency, languages, area and borders for all 193 UN member states from a bundled dataset.
- World Clock & Global Timezone Converter — Converts between time zones with daylight saving handled properly.
- ZIP Code & Postal Code Lookup — Resolves postal codes across several countries, normalizing the formats each one expects.
- Trivia Quiz Generator — Ten moderated multiple-choice questions per round from the Open Trivia Database.
- Name Origin, Nationality & Age Predictor — Shows the record count behind every prediction, which is what separates signal from noise.
- Joke Generator — Filtered against all six of the source API's content flags, not a subset.
All data & reference (23)
Country Information Lookup
Country info for 250 countries and territories — population, capital, area, currencies, languages, calling code…
Random Quote Generator
Get random inspirational, motivational, and famous quotes. Filter by author or category.
Joke Generator
Get random jokes in multiple categories — programming, puns, dark humor, and more.
Trivia Quiz Generator
Test your knowledge with random trivia questions. Choose category, difficulty, and question count.
ZIP Code & Postal Code Lookup
Find city names, states, counties, latitude, and longitude coordinates from any US or international postal code.
NASA Astronomy Picture of the Day
Explore breathtaking daily NASA space photography, cosmic nebula images, and expert astronomical explanations.
Random Fun Facts & Trivia Generator
Discover surprising, verified, and fascinating random facts about history, animals, science, and the world.
World Clock & Global Timezone Converter
A world clock converter across 12 major cities, with offsets shown to the minute because not every zone is a whole…
Name Origin, Nationality & Age Predictor
Discover the most probable nationality, country of origin, and median age associated with any first name using…
Dog & Cat Breed Encyclopedia
Explore popular dog and cat breeds with details on size, average lifespan, temperament, energy levels, and…
Random Name Picker
A random name picker that draws one or several winners with no repeats, using the same cryptographically secure…
Coin Flip
Flip a virtual coin for a fair heads-or-tails answer, or flip up to 1,000 at once and see the counts, percentages…
Dice Roller
Roll any dice with standard notation like 2d6+3, 4d6 drop lowest or d20 advantage, and see the exact odds of every…
Printable Calendar
Make a free printable calendar PDF for any year: 12 monthly pages or one yearly page, with U.S.
Military Time Converter
Convert military (24-hour) time to standard AM/PM time and back, see how to say it (“fourteen thirty hours”), and…
Week Number
See today’s week number under both ISO 8601 (Monday start) and the U.S.
Distance Between Cities Calculator
Find the straight-line distance between two cities or coordinates in miles, kilometers and nautical miles, plus…
Tournament Bracket Generator
Make a single-elimination tournament bracket for 2–64 teams with proper seeding and byes.
Julian Date Converter
Convert dates to Julian dates both ways: the YYDDD day-of-year code used on packaging and by the military, and the…
Chinese Zodiac Calculator
Find your Chinese zodiac animal, element and yin or yang from your birth date, using the real Lunar New Year so…
Bar Graph Maker
Make a bar graph from pasted data in seconds: single or grouped bars, vertical or horizontal, sorted, with value…
Shoe Size Converter
Convert shoe sizes between US men’s, women’s and kids’, UK, EU and Japan cm, or find your size from foot length.
Ring Size Converter
Convert ring sizes between US, UK letters, EU/ISO, Japanese and Swiss sizes, or find yours from a diameter, a…
Why 193 and not some other number
Country tools have to draw a boundary and every option is arguable. We use United Nations membership: 193 states. Vatican City and the State of Palestine are permanent observers rather than members and are excluded on that basis. Taiwan, Kosovo and several others are recognized by some states and not others. Dependencies and overseas territories have flags and populations but are not sovereign. UN membership is the least contestable line available because it is a fact about a register rather than a judgment about legitimacy.
Time zones are political, not geographical
Offsets are set by governments and change — sometimes with very little notice, and sometimes in the middle of a year. Daylight saving start and end dates differ by country and hemisphere, several regions have offsets that are not whole hours, and a few have abolished the practice recently. This is why converting by adding a remembered number of hours fails in exactly the weeks it matters most. Any correct conversion has to use a maintained time zone database rather than a fixed offset.
On free trivia and reference APIs
Several tools in this category are wrappers over free public APIs, and the honest question about any of them is where the data actually comes from. The Open Trivia Database publishes community-submitted questions only after volunteer moderation, and holds roughly twice as many pending review as it serves — which is genuine quality control, and still not editorial verification. We have deliberately not published tools built on sources whose content is unverified trivia or placeholder data, however convenient the API.
Frequently asked questions
How current is the country data?
It is a bundled snapshot built from an open, version-controlled dataset with World Bank population figures, and each page states the year the population data refers to. It updates when we rebuild rather than continuously.
Why does a postal code lookup fail for my address?
Coverage varies by country and several only resolve the first part of a code — Canada's forward sortation area, the UK's outward code. The tool normalizes what you type to the format the data source expects, but some regions simply are not covered.
Are the trivia questions verified?
They are community-submitted and moderated by volunteers before publication, which is better than most free trivia sources and is not the same as editorial fact-checking. Errors do occur.
Does the world clock handle daylight saving?
Yes. It uses the browser's time zone database rather than fixed offsets, so daylight saving transitions and non-hourly offsets are applied correctly.
Why do some reference tools return nothing?
Usually because the answer genuinely is nothing — an uncommon name with no records, a postal code outside the covered region. Our tools aim to distinguish that from a failure and say which one occurred.