カントリーホイール
旅行や学習用のランダムな国ジェネレーター
- アメリカ
- 日本
- フランス
- ブラジル
- オーストラリア
- イタリア
- カナダ
- スペイン
- ドイツ
- イギリス
Country Wheel — A Random Country Generator for Travel, Geography, and Curiosity
Can't decide where the next trip goes, or which corner of the map to teach today? Spin the wheel and let it drop you somewhere. Cryptographically random, works offline, no signup.
There are 195 countries on the map — pick one the fun way instead of arguing over it
wheel.expertを選ぶ理由
Break the 'Same Three Places' Rut
Most of us cycle through the same handful of destinations in our heads. The wheel doesn't have a comfort zone. Load fifty countries and it might land you on Georgia, Namibia, or Laos — somewhere you'd never have typed into a search bar on your own.
Settle the 'Where Should We Go' Standoff
Two people, four favorite countries, zero agreement. Put all of them on the wheel and let one spin end the deadlock. Nobody loses the argument because the algorithm made the call, not your travel partner.
Build Your Own List of Countries
Type a custom set — your bucket list, the nations in a continent you're studying, the visa-free spots from your passport. The wheel spins only what you load, so a 'just South America' wheel stays South American.
Spins in the Classroom, Offline
School WiFi cutting out mid-lesson? It still runs. Installed as a web app, the wheel works with no connection at all — on a projector, a tablet, or a phone passed around the dinner table.
Every Country, Equal Odds
Some random tools quietly favor whatever sits first in the list. This one pulls from the Web Crypto API — the randomness browsers trust for security keys — so tiny Tuvalu and enormous Canada have exactly the same chance of coming up.
Free, No Account
Nothing is paywalled, nothing is mailed to you, nothing is saved to a server. Open it, give it a spin, close the tab whenever you're done.
How to Use the Country Wheel
Load Your Countries
Start from the preset spread — USA, Japan, France, Brazil and the rest — or clear it and type your own. One country per slot: 'New Zealand,' 'Morocco,' 'Vietnam,' as many as you like.
Shape the List
Add countries, drop the ones that don't fit, reorder them however you want. A wheel of all 54 African nations plays very differently from a five-country shortlist, so match it to what you're actually deciding.
Spin
Tap the center. The wheel turns, slows, and stops on one country — picked by the algorithm, not by where you nudged it to land.
Go With It, or Spin Again
Take the result and start planning, researching, or cooking. Or pull the winner out and spin for the next one to build a whole itinerary. Earlier picks sit waiting in the history panel.
What People Actually Use the Country Wheel For
Picking the Next Trip
When the bucket list is too long to choose from, load it all and let one spin narrow it down. The randomness is the point — it surfaces the place you keep putting off rather than the easy default.
Geography Lessons and Map Drills
Teachers spin a country, then class finds it on the map, names the capital, and traces the borders. It turns rote memorization into a quick guessing game students actually lean into.
Cook-a-Country Dinner Nights
Spin a country and make a dish from it that evening — the cuisine, the spices, the table you'd never have planned. A standing weekly version slowly turns a kitchen into a passport.
Language and Culture Practice
Learners spin to choose where the day's practice 'visits' — read a short article from that country, learn three phrases, look up a tradition. Random targets keep the routine from going stale.
Trivia and Quiz Prep
Quiz hosts and students spin a country, then drill its flag, currency, and famous landmarks. It's a fast way to cover the whole map without always defaulting to the same big names.
Why This Beats a Mental Coin-Flip — or a Generic Random Tool
Real Randomness, Not a Biased Draw
Your List, Not a Fixed Set
No Account, No Upsell
ルーレットを回す準備はできましたか？
毎日、公平でランダムな選択をする何千人もの仲間に加わろう。
真にランダムな選択 - アルゴリズムの仕組み
Math.random() を使用する多くのホイール スピナーとは異なり、wheel.expert は暗号的に安全な乱数を生成するためにWeb Crypto API (crypto.getRandomValues()) を使用します。これは、パスワード ジェネレーターなどのセキュリティ クリティカルなアプリケーションで使用されるものと同じ API です。
ウェブ暗号化 API (CSPRNG)
すべての最新ブラウザに組み込まれている暗号的に安全な擬似乱数ジェネレーター (CSPRNG)である crypto.getRandomValues() を使用します。
不偏選択アルゴリズム
すべてのエントリの重みが等しい場合は、 ランダム選択でよくある問題であるモジュロ バイアスを排除するために拒否サンプリング を使用します。これにより、 各エントリが選択される確率が数学的に等しいことが保証されます。重み付けされたエントリでは、確率は割り当てられた重みに比例します。
クライアント側の透明性
すべてのランダムな選択はスピンの瞬間にブラウザ内で行われます。コードはオープンであり、ブラウザーの DevTools 経由で検査できます。重要な景品の場合は、視聴者に対する公平性の証拠としてスピンを画面録画することをお勧めします。
🔍 自分で確認してください: DevTools (F12) を開き、コンソールで乱数の生成を確認します。私たちは window.crypto.getRandomValues() を使用します。これは銀行やセキュリティ アプリケーションで使用されているのと同じ暗号化 API です。
一般的な使用例
- ✓旅行先
- ✓地理の授業
- ✓文化探訪
- ✓食の冒険
- ✓語学学習
よくある質問
Yes. Clear the presets and add any nations you want — 'Iceland,' 'Peru,' 'Bhutan,' one per slot. The wheel spins only what you load, so a wheel of just the countries you've never visited stays exactly that.
It's genuinely random. The picker draws from the Web Crypto API, the same source browsers use for security keys, so a small island nation has the same odds as a giant like Russia. There's no hidden weighting toward the top of the list.
Spin once, remove the winner, and spin again. Each country drops out of the next round, so a few spins hand you a route — first stop, second stop, third — with no repeats along the way.
It does. The country wheel installs as a progressive web app, so after the first visit it runs fully offline — useful in a classroom with shaky WiFi or on a flight while you sketch out an itinerary.
Plenty of teachers do. Project it, spin a country, and the class locates it, names its capital, and talks through what makes it distinct. It turns map review into a quick daily game rather than a worksheet — handy when you're covering all 195 countries over a term.
Easily. Load only the countries from that region — just the ASEAN nations, only the Nordics, or the full list of African states — and the wheel will never wander outside it. The pool is whatever you put in, nothing more.