Privacy & Site Policy

Last updated 18 September 2026 · Written by the person who runs the site.

This page explains what this site does, what information it stores, and what happens when you use it. The site is intentionally simple: there is no advertising, no analytics, no email sign-up, and no real-money gameplay.

1. What this site is

A place to practise two card games with counters that have no monetary value.

Blackjack is the main table: the dealer follows the rules configured for the table, and a strategy chart can help you evaluate your decisions. Texas Hold'em is a second game: a no-limit cash game with fixed blinds, open to the public.

Nothing can be deposited or withdrawn. There are no real-money bets, prizes, jackpots, or redeemable virtual items. Nothing earned or displayed on this site has monetary value.

2. What it is not

• Not a casino or betting service. The site does not accept wagers or provide real-money gambling.
• Not affiliated with gambling operators. The site is an independent project and is not presented as a casino, sportsbook, or gambling platform.
• No gambling advertising. The site does not intentionally display advertising for casinos, betting services, or similar operators.
• No paid advantage. There are no paid features that improve gameplay, alter results, or provide an advantage on any leaderboard.
• Not gambling advice. The information provided is for educational and practice purposes. Basic strategy does not guarantee a profit at a real casino, and nothing here will make you a winning poker player.

3. Who runs it

The site is published under the name GreenThief. It is maintained as an independent personal project.

Contact: hello@blankjack.com. I read everything and will do my best to respond.

The site is not operated as a gambling business and does not sell access to gambling services.

4. What is stored, and where

In your browser

Some information is stored locally in your browser using browser storage. This is what lets the site remember your progress, your settings and who you are between visits.

This browser-stored information is not used to identify you across the web. You can remove all of it at any time by clearing the site's stored data in your browser — but be aware that this includes your recovery key, and the key cannot be recovered afterwards.

On the server

The website and its services are hosted using third-party infrastructure and self-managed infrastructure. Hosting providers may keep standard technical access logs as part of operating their services.

The application itself is configured to minimize the amount of technical information it stores. IP addresses are not intentionally stored as part of player profiles or leaderboard records.

If you email me

If you contact me by email, I receive the information contained in your message and your email address. I use it only to communicate with you about your message and do not add you to a mailing list without your request.

5. Your name on the site

You can play blackjack on your own without giving the site anything at all. A name is only needed for the things that involve other people: appearing on a leaderboard, and sitting at a public poker table. It is claimed once, on the home page, and works for both games.

Claiming a name creates one record on the server:

There is no email address and no conventional password. You are shown a recovery key once instead, and it is kept only in your browser. That is a deliberate trade: nothing to leak, nothing to reset, and nothing I could send you — but if you lose the key and clear your browser, the name is gone and I cannot restore it for you.

The nickname you choose is the information intentionally made public. Names may be moderated: names that are abusive, misleading, impersonating others, or used for advertising may be removed or changed.

You can remove your entry using the deletion control provided by the site. When an entry is deleted, the associated data is removed from the active database.

6. The leaderboards

Every leaderboard lives at /leaderboard, with one board per game. The games are scored separately: results in one do not move your position on the other's board.

The ordinary blackjack table is designed to run locally in your browser, and playing that way does not create a leaderboard entry or send results to the server. Only ranked play is scored.

Ranked blackjack

Ranked games use server-side game logic so that important game state is not controlled entirely by the browser. The server determines the shoe, deals the cards, and maintains the game state.

The browser sends player actions such as betting, hitting, and standing, and receives the information needed to display the table.

Fairness verification

Ranked sessions use a commitment-based shuffle verification system. Before a session begins, a cryptographic hash of a secret seed is published. After the session, the seed is revealed so that the published hash and resulting shoe can be independently checked.

The purpose of this system is to make the shuffle independently verifiable rather than asking players to simply trust the server. The same method is used for poker hands.

How much to trust a board

The leaderboard page itself explains the limits of what the server can check, and those limits are real. Treat any board here as a scoreboard among people playing in good faith rather than as a competitive ranking.

7. The poker room

Texas Hold'em is open to the public: a no-limit cash game with fixed blinds, four seats to a table, and counters with no monetary value. There is no buy-in with real money and nothing to cash out.

There are two ways to play, and what they involve is different:

• Against bots. No other people are involved and nothing is scored. Your counters here are your ordinary blackjack bankroll — see section 6 — so running out is handled by starting that bankroll over, the same way it would be at the blackjack table.
• At a public table. Other people are at the table with you. They can see the name you chose, the counters in front of you, and every action you take. They cannot see your cards until a hand is shown down, and your cards are not sent to their browsers before then. Sitting down draws a fixed amount from your separate poker bankroll; standing up returns whatever is in front of you to it. If a hand leaves you with nothing to play, the table offers to buy back in from that bankroll, and if the bankroll itself is empty, to refill it before sitting you back down.

There is no chat, no private messaging, no voice, and no way for one player to send anything to another beyond the actions the game itself allows. That is a decision, not an omission: a site this size cannot moderate a chat channel properly, and an unmoderated one is worse than none at all.

Because a public table is shared, the server runs the whole hand — poker cannot be played offline the way ordinary blackjack can. Your name and your play are visible to whoever else is sitting there. If you would rather not be seen by other people, the bots table involves nobody but you.

8. Cookies and tracking

This site does not use advertising cookies or analytics trackers.

The site uses browser storage as described in section 4. Browser storage is different from cookies and is used to keep the games functional between visits.

The site does not intentionally use third-party analytics, advertising networks, tracking pixels, or behavioral profiling.

Most pages and assets are served directly from the site's own infrastructure. If you choose to use an external service, such as the payment provider used for voluntary contributions, that service may make its own requests and process information according to its own policies.

9. Your data and your choices

Depending on where you live, local privacy and data protection laws may give you rights regarding personal information, including rights to access, correct, delete, restrict, or object to certain uses of your information.

This site is designed to collect as little information as reasonably possible. If you only use the blackjack practice table, most game information remains in your browser and is not associated with an identity.

If you have claimed a name, you can remove it using the deletion control provided by the site.

If you have a question about information associated with you, contact hello@blankjack.com.

10. How the games behave

• Cards in the ordinary blackjack practice mode are generated and shuffled in your browser using its available random number generator.
• Ranked blackjack and all poker use server-side game logic and a separately verifiable shuffle process.
• The games use play-money counters only. They cannot be purchased, exchanged, withdrawn, or converted into money.
• Results are simulations and should not be treated as predictions of what will happen at a real table.
• The blackjack strategy information is provided for learning and practice and may vary depending on the selected table rules.
• The practice bankroll can be reset at any time and has no monetary value.
• The three play-money balances are kept apart on purpose. Ranked blackjack buys in for the same fixed amount every session, whatever else you have won, because a leaderboard that compares profit only means anything if every attempt starts from the same figure.
• At a public poker table the server holds the cards and the chips. Your browser is shown its own hand and nobody else's until a showdown, and the deck for every hand is committed to before it is dealt and revealed afterwards, so it can be checked.
• Casual blackjack and poker against bots are dealt in your own browser. That balance is stored rather than enforced: it is a save file, not a ledger, and nothing that happens there is ranked.

11. Money and support

The site is free to use. There are no paid features required to play and no purchase is necessary to access the main functionality.

You may optionally support the project through a third-party payment provider such as Stripe. Contributions are voluntary and do not buy an advantage, prize, leaderboard position, feature, or other benefit.

Payment information is handled by the payment provider. The site does not intentionally receive or store your full payment card details. The payment provider may process payment, contact, transaction, and other information according to its own terms and privacy policy.

If a contribution is made accidentally or you believe a payment was made in error, contact hello@blankjack.com and the situation will be reviewed.

12. Responsible play

BlankJack is a practice simulator and does not involve real-money gambling. However, it simulates two real gambling games.

Blackjack and poker can involve financial risk when played for real money. Learning basic strategy does not remove the house edge, and doing well against bots or at a play-money table says very little about how you would do for money.

If gambling is causing problems for you, consider contacting a gambling-support organization or other appropriate local support service in your country. In Switzerland the free, anonymous, round-the-clock helpline is 0800 040 080, in several languages.

13. International visitors

The site is available internationally. Different countries and regions have different laws concerning gambling, simulated gambling, online services, privacy, payments, and age restrictions.

BlankJack is intended as a practice and educational simulator and does not accept wagers or provide gambling prizes. However, the laws that apply to you may depend on where you live.

If you are unsure whether using a simulated gambling game is permitted where you live, you should check the rules applicable in your location.

Data transfers

Because the site uses hosting, infrastructure, email, and payment services, information may be processed in countries different from your own. Where third-party services are used, their own privacy policies and terms may also apply.

Languages

The interface is available in English, French, German and Italian. This policy is currently written in English. Translations may be provided for convenience, but the English version is the reference version if translations differ.

14. Age

BlankJack does not involve real-money gambling, betting, or prizes. It is a simulation intended for practice and learning.

Because laws and age restrictions can differ between locations, users should follow the rules that apply to them. The site is not intended to encourage underage participation in real-money gambling.

A public poker table puts you in the same room as other people, which is a different thing from playing alone. There is no chat and no way for another player to contact you, which is the main reason that stays true — but if you would rather not be visible to strangers under a chosen name, the bots table involves nobody but you.

15. Accuracy and liability

The site is a personal project and is provided on an as-is basis. Reasonable care is taken to make the rules, payouts, calculations, and strategy information accurate, but errors may occur.

Nothing on this site is financial, legal, medical, or gambling advice. Results from the simulator do not predict or guarantee results in real-money games.

You use the site at your own discretion. If you notice an error or something that appears to behave incorrectly, please report it to hello@blankjack.com.

16. Changes to this page

This policy may be updated when the site changes or when the information on this page is no longer accurate. The date at the top of the page indicates when it was last updated.

Where practical, significant changes to the site's data practices will be reflected in an updated version of this page.

If you notice something on this page that is wrong, unclear, or out of date, please let me know at hello@blankjack.com.