Secret Prompter
BuildClub · AI Assistant · Prompts
Secret Prompter is a free daily AI prompt guessing game that shows an AI-generated image and asks you to guess the prompt behind it, competing on a leaderboard of prompt engineers.
About Secret Prompter
What Is Secret Prompter
Secret Prompter is a browser game from BuildClub that flips the usual AI image workflow. Instead of writing a prompt to get a picture, you start with the picture and try to recover the prompt that made it. The site describes itself as Wordle for AI engineers, and the comparison holds up: one puzzle a day, a fixed number of tries, and a shared answer everyone is chasing at the same time.
The idea is simple to grasp and quick to play. You see a single generated image, type your guesses, and get feedback that nudges you toward the real wording. It turns prompt writing into a puzzle you can learn from rather than a chore you grind through.
The catch is that this is a game, not a prompt library. There's no export, no saved history of everything you've solved, and no tool to write prompts for you. If you want a working prompt vault, you'll need a different app. Secret Prompter is about the skill, not the storage.
Getting Started
- Open the Secret Prompter page in any web browser. No account or download is required to play.
- Look at the AI-generated image for the day and study its subject, style, and odd details.
- Type a guess at the prompt and submit it to see how close you landed.
- Use the feedback to refine your next guess. Each round allows up to 5 attempts.
- Finish the round and check where you rank on the daily leaderboard.
Product Information
A quick look at Secret Prompter's pricing, supported platforms, and performance.
Best for
The users, tasks, and scenarios where this tool fits best.
Users
- Aspiring prompt engineers
- AI hobbyists who like daily puzzles
- Designers and artists
- Teachers and workshop hosts
Tasks
- Guessing the prompt behind a generated image
- Learning prompt structure
- Warming up before a creative session
- Competing for a daily rank
Scenarios
- Taking a two-minute break with a puzzle you can finish in one sitting.
- Comparing your guess with friends who played the same daily image.
- Practicing prompt writing when you don't have a project open.
- Testing how well you really understand the models you use every day.
Key features
Daily AI Image Challenge
A new generated image drops each day, and everyone plays the same one. You get a fresh puzzle on a fixed schedule, so there's a reason to come back and a shared answer to talk about with other players.
Prompt Guessing With Feedback
You reverse engineer the prompt by submitting guesses, and the game tells you how close you got, which turns a blind guess into a process. The feedback loop is what makes it feel like a puzzle rather than a lottery, and it teaches you which words actually move the result.
Ranked Leaderboard
Each round places you against everyone else who played that day. Chasing a higher rank adds a competitive edge that a solo practice tool can't match, and it gives you a concrete number to improve.
Five Attempts Per Round
You get up to 5 tries to nail the prompt. The limit keeps rounds short and adds tension, so you have to think about each guess instead of spraying wording at the wall.
Free Browser Play
The whole thing runs in a web browser with no download, no sign-up wall, and no cost. You can open it on a phone or a laptop and start playing in seconds.
Prompt Engineering Practice
The game treats prompt writing as a skill you build through repetition. By working backward from an image, you pick up the patterns behind good prompts faster than you would from reading a guide.
Pros and cons
Pros
- Free to play with no account or app install needed.
- One puzzle a day keeps sessions short and easy to fit into a break.
- The leaderboard adds a competitive reason to keep practicing.
- Feedback on each guess teaches prompt structure through play.
Cons
- There's no saved history or export, so you can't keep the prompts you solve. If you want a reusable library, you'll need another tool.
- It's a game rather than a working prompt generator, so it won't help you ship a real project.
- No mobile app means you play through the browser, which can feel less polished than a native experience.
Frequently asked questions
It's a free web game from BuildClub that shows you an AI-generated image and challenges you to guess the prompt behind it, with a daily leaderboard to rank your results.
Related content
Explore related tools, skills, and articles for Secret Prompter.
Secret Prompter Alternatives
Agibot
Agibot · Productivity · AI Assistant · ChatbotAgibot is a personal AI agent for Mac that keeps running after you close the window, runs routines on a schedule, and works from Telegram or Slack with your own API keys.
Foley
Hanamori Labs, LLC · Voice & Language · Productivity · AI AssistantFoley is a voice to-do list that turns a spoken sentence into a filed task, complete with project, date and time, then helps you plan the day around what is already there.
Ghost Core
Ghost · Productivity · AI AssistantGhost Core is a $3,499 screenless personal AI computer that runs local AI models on its own hardware, builds context from your apps and devices, and acts without waiting for a prompt.