What's The PIN
One PIN. Ten guesses. Color-coded clues. New every day. Now with endless mode, 15 achievements, an all-time top-100 leaderboard, and a live daily timer.
What Is What's The PIN?
What's The PIN is a daily 4-digit number puzzle. A new PIN is set every day. You have ten guesses to crack it. After each guess, color-coded feedback tells you which digits are correct and in position, which are correct but in the wrong position, and which aren't in the PIN at all. It is, in structure, Mastermind — the classic code-breaking logic game — played against a daily fixed target with a live timer, a global leaderboard, and an endless mode for when the daily PIN isn't enough.
The latest update adds fifteen achievements, an all-time top-100 leaderboard, speed unlocks including Blink (crack the daily PIN in under 15 seconds), and an Endless Mode that runs a random 4-digit PIN on loop for as long as you want. Player names extend up to 12 characters now with a profanity filter on both ends. No account. No download. Free in any browser.
Recommended for: daily puzzle completionists, people who've run out of Nerdle or Numberle, and anyone who has ever been locked out of their phone and thought "I could have guessed that." The educational tier writes itself — there are 10,000 possible 4-digit PINs (0-9⁴), but human-chosen PINs are far from random. Nick Berry's 2012 Data Genetics study of 3.4 million leaked codes showed 1234 alone accounting for 10.7% of all PINs, with the top 20 codes covering 26.83%. The Frustrated Bank PIN is selected randomly from the full 10,000 each midnight UTC. It might be 1234. It probably isn't.
How It Works
Enter your first guess.
Type any 4-digit PIN to start. The daily timer begins on your first keystroke. Each digit is color-coded after you submit: green means correct digit in the correct position, yellow means correct digit in the wrong position, grey means not in the PIN at all. Use the feedback to narrow the code.
Use logic to close in.
You have ten attempts. No random guessing required — the color system gives enough information to crack most PINs methodically. The Mastermind strategy applies: use each guess to eliminate digit positions, not just digits. The daily timer runs throughout, freezing on crack or fail. Repeated digits behave Wordle-style — guess 1191 when the PIN is 1234 and only the first 1 lights green.
Check the leaderboard and unlock achievements.
After each game, your result is posted to Today's Crackers — a live breakdown of how other players cracked the same PIN today. The Stats menu also shows All-Time Leaders: a top-100 board aggregated across every day, showing each player's best crack, total lifetime cracks, and the date they hit their best. Fifteen achievements unlock across play sessions — Mastermind for cracking in three guesses or fewer, Speed Demon for under 60 seconds, Blink for under 15. The Endless Mode menu option runs infinite random PINs for practice or for players who want more than one puzzle per day.
Who Plays This
What's The PIN pulls a different audience than the reflex-driven Mini-Games entries — slower, more deliberate, with a heavy Wordle-migrant slant and a mid-morning routine fit. Below are the four most common player archetypes we've seen.
"Wordle at breakfast, What's The PIN on the commute. It's four digits, ten guesses, and a timer. I have cracked it in 3 twice and I think about it more than I should."
— Sarah · Chicago
"Nerdle was great until I wanted something simpler. No equations, just the digits. What's The PIN is that. Also I'm on the all-time leaderboard."
— Dev · Austin
"15 achievements. I have 14. Blink is the problem. Under 15 seconds. I'm fast but I'm not Blink fast. Yet."
— Jordan · Brooklyn
"Endless mode. Random PINs. No timer pressure. Just the logic. I don't know what time it is. I've cracked 40 PINs tonight. This is fine."
— Priya · London
Best Captions for Sharing This
Send the link with one of these. Hook the click — never describe the trap. The recipient should find the "card retained" panic themselves.
cracked today's what's the pin in 3 guesses. it's a daily 4-digit number puzzle. free, no account. frustrated.io/whats-the-pin
the blink achievement requires cracking the daily PIN in under 15 seconds. i have not done this. i am trying.
if you're looking for something to play after your daily wordle or nerdle — frustrated.io/whats-the-pin — 4-digit daily number puzzle
10 guesses. 4 digits. all-time leaderboard. the same people keep cracking it in 3. frustrated.io/whats-the-pin
i got buzzer beater on my tenth guess. the game said nothing. the leaderboard said everything.
what's the pin added endless mode. it runs random 4-digit PINs on loop. this is either a gift or a problem.
daily number puzzle. 4 digits, 10 guesses, live timer. for people who find wordle too wordy. frustrated.io/whats-the-pin
there's an all-time leaderboard now. it shows who cracks it fastest across every day. the top players are unwell. i respect them.
What's The PIN vs The Alternatives
How this stacks up against the closest sibling games in the daily-number-puzzle space — guessthepin.com (the original community PIN site), Nerdle (daily math equation), Numberle (daily number), and Primel (daily 5-digit prime).
| Feature | guessthepin.com | Nerdle | Numberle | Primel | What's The PIN (#96) |
|---|---|---|---|---|---|
| Daily puzzle | No (random, crowd) | Yes | Yes | Yes | Yes — 00:00 UTC |
| Number-based | Yes (4-digit) | Yes (equation) | Yes (number) | Yes (prime) | Yes (4-digit PIN) |
| Color-coded feedback | No | Yes | Yes | Yes | Yes |
| Guesses allowed | Unlimited | 6 | 6 | 6 | 10 |
| Endless mode | No | No | No | No | Yes |
| Achievements | No | No | No | No | 15 |
| All-time leaderboard | No | Yes | No | No | Yes — top 100, aggregated |
| Live daily timer | No | No | No | No | Yes |
| Speed achievements | No | No | No | No | Yes — 60s / 30s / 15s tiers |
| Free, no account | Yes | Yes | Yes | Yes | Yes |
| Mobile browser | Yes | Yes | Yes | Yes | Yes |
Specifications
| Genre | Daily number puzzle · Mastermind-style · PIN-guessing game · Browser-based |
| Built with | HTML, CSS, JavaScript |
| Mobile compatible | Yes — touch-optimized ATM keypad, full mobile rendering |
| Sound | Yes (default on, persistent toggle) — Web Audio synthesised, no audio files |
| Daily mode reset | 00:00 UTC every day |
| Maximum attempts per day | 10 (Daily mode) |
| Endless mode | Yes — Normal (with color clues) and Hard (no clues, coming soon). Unlimited attempts, infinite rounds. |
| Achievements | 15 unlockables, persistent across sessions. Includes speed unlocks (Speed Demon under 60s, Lightning under 30s, Blink under 15s), streak unlocks (Week-Long, Monthly), milestone (Century at 100 cracks), and gameplay (Mastermind, Bullseye, Buzzer Beater, Comeback Kid). |
| Live daily timer | Starts on first guess, persists across reloads, freezes on crack or fail. Powers speed achievements. |
| Hint feedback | Wordle-style green / yellow / grey, duplicate-aware |
| PIN length | 4 digits (0000-9999) |
| Total PIN combinations | 10,000 |
| Leaderboards | Today's Crackers (per-attempt, last 24h) + All-Time Leaders (top 100 players aggregated, one row per player showing best crack + total lifetime cracks + date of best) |
| Live counter | Wrong-guess count today, resets at midnight UTC |
| Player names | 1–12 characters (letters, numbers, underscore). Profanity filter on both client and server. |
| Save persistence | Browser localStorage — name, achievements, streak, lifetime stats, in-progress daily session |
| Honors prefers-reduced-motion | Yes (animations disabled) |
| Account / signup required | None |
| Ads on this page | None |
Reviews
"I play Wordle every morning then this. It's quicker, it's numbers, and the timer makes it feel genuinely competitive. Cracked it in 2 guesses once. Still haven't beaten that."
"The all-time leaderboard is dangerous. I spent three days trying to get my name higher. I have a problem. The game is excellent."
"Four stars because I've been trying to get the Blink achievement for a week. Under 15 seconds is not as easy as it sounds. The rest of the game is great."
Frequently Asked Questions
Real questions from search. Real answers from us.
What is What's The PIN?+
What's The PIN is a free daily 4-digit number puzzle on Frustrated.io. A new PIN is set each day. Players have ten guesses to crack it using color-coded feedback — green for correct digit in the right position, yellow for correct digit in the wrong position, grey for digits not in the PIN. It is structurally Mastermind, played against a daily fixed target, with a live timer, an all-time leaderboard, 15 achievements, and an endless mode for off-daily play.
How is this different from Wordle?+
Wordle guesses 5-letter words. What's The PIN guesses 4-digit codes. There are no letters involved — only the digits 0–9 in a 4-position sequence. The color feedback logic is the same, but the solution space is numerical: 10,000 possible combinations rather than a word list. Players who enjoy Nerdle, Numberle, or other daily number puzzles tend to find this sits in the same daily routine slot.
Is there an endless mode?+
Yes. Endless Mode runs a random 4-digit PIN each round with the same color-coded clue system as the daily puzzle — unlimited attempts, infinite rounds. A Hard variant is on the menu as Coming Soon: Mastermind-style hints only, no color feedback.
What are the achievements?+
There are 15 achievements. Speed achievements — Speed Demon (under 60 seconds), Lightning (under 30), and Blink (under 15) — are tied to the daily timer that starts on your first guess. Other achievements cover streak length (Week-Long Streak), total cracks (Century at 100), guess count (Mastermind for three guesses or fewer, Buzzer Beater for a tenth-attempt crack), and Comeback Kid. All track persistently across sessions. No account required.
What is the all-time leaderboard?+
The Stats view shows Today's Crackers — a per-attempt breakdown of how today's daily PIN was solved by all players — and All-Time Leaders, a top-100 board showing each player once with their best crack, total lifetime cracks, and the date they achieved their best. Multi-crack rows are merged so the leaderboard reflects skill rather than session volume.
How does the daily timer work?+
The timer starts on your first guess of the day and counts up. It persists across reloads and freezes when you crack the PIN or run out of guesses. The final time is submitted to the leaderboard and is required for the speed achievements. There is no penalty for slow play — the timer records your time, not limits it.
Do I need an account?+
No. No signup, no account, no email address. You choose a name (up to 12 characters) when you first play and that name appears on the leaderboard. Progress and achievements are saved to your browser via localStorage.
Can I play on mobile?+
Yes. The game runs in any modern mobile browser with no download required. The number pad works via touch on mobile, and all features — daily puzzle, endless mode, achievements, leaderboard — are available on phone and tablet.
Can I play more than once per day?+
The daily PIN is one puzzle per day. Endless Mode provides unlimited rounds of random 4-digit PINs whenever you want more. The Endless Hard variant (Mastermind-style hints only) is coming soon.
Is What's The PIN free?+
Yes. Free to play, no signup, no download, no account, no subscription. It runs in any modern browser. Ad-free during gameplay.