Brompt is an open-source, privacy-first web application designed to bridge the gap between prompt engineering theory and practical execution. Check live demo here
Writing high-quality prompts for LLMs (Large Language Models) is often a friction-filled process. Users face "prompt fatigue"—the cognitive load of remembering complex frameworks, context requirements, and formatting rules.
Brompt solves this by turning prompt creation into a conversation.
Instead of staring at a blank text box, Brompt guides you through a dynamic, interactive questionnaire tailored to your specific goal. The result? A structured, high-performance "Mega-Prompt" generated in seconds.
- Simple by Default: No complex settings to tweak upfront. Just type your goal and start.
- Privacy First: No backend database. Your API keys, history, and drafts live exclusively in your browser's
localStorage. - Schema-Driven: The UI adapts in real-time based on what the AI needs to know, powered by a flexible JSON schema engine.
- Privacy-First: No backend server. All data stays in your browser's
localStorage. - Multi-Provider Support: Use your own API keys for OpenAI, Anthropic, Gemini, Mistral, or Groq.
- Dynamic Form Engine: The AI asks clarifying questions to refine your request.
- History Management: Save and resume past prompt engineering sessions.
- Export Options: Copy the final prompt or save it for later use.
- Internationalization: Support for English and Portuguese.
- Dark Mode: Fully supported via Tailwind CSS.
- Framework: Next.js 15 (App Router)
- Language: TypeScript
- Styling: Tailwind CSS
- AI Integration: Vercel AI SDK
- State Management: React Context + Hooks
- Icons: Lucide React
- Node.js 18+
- pnpm (recommended) or npm/yarn
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Clone the repository:
git clone https://github.com/henriquenas/brompt.git cd brompt -
Install dependencies:
pnpm install
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Run the development server:
pnpm dev
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Open http://localhost:3000 in your browser.
Brompt requires API keys to function. You can enter your keys directly in the application settings (gear icon).
- Google Gemini: Get a key from Google AI Studio.
- OpenAI: Get a key from OpenAI Platform.
- Anthropic: Get a key from Anthropic Console.
- Mistral: Get a key from Mistral Platform.
- Groq: Get a key from Groq Console.
Keys are stored encrypted in your browser's localStorage and are never sent to any server other than the respective AI provider.
- Passphrase Setup: When you first save an API key, you will be prompted to create a passphrase. The app uses AES‑GCM with PBKDF2 (Web Crypto API) to encrypt keys at rest.
- Unlock Flow: On subsequent visits, you must enter your passphrase to unlock your keys. The keys are decrypted in memory for the session only.
- Reset: If you forget your passphrase, use “Reset all keys” in the unlock modal to clear stored keys and set a new passphrase.
- Multiple Providers: Changing the passphrase re‑encrypts all provider keys atomically to keep them consistent.
We welcome contributions from the community! Whether it's fixing bugs, adding new features, or improving documentation, your help is appreciated.
Please read our CONTRIBUTING.md for details on our code of conduct and the process for submitting pull requests.
For more detailed information about the project structure and workflows, check out the /docs directory:
- Architecture Overview: docs/architecture-overview.md
- User Workflow: docs/user-journey-workflow.md
This project is licensed under the MIT License - see the LICENSE file for details.