2prompt is a free, privacy-first prompt engineering tool that turns seven structured questions into a production-ready system prompt. Every selection runs in your browser. Nothing you enter ever leaves your device.
A master prompt — sometimes called a system prompt, custom instruction, or persona prompt — is the foundational instruction set that configures how an AI model behaves across an entire conversation. It defines the role the model plays, the tone and depth of its responses, the constraints it must respect, and the structure of its output. A well-written master prompt is the difference between a generic AI assistant and one that feels like a senior specialist on your team.
2prompt builds these master prompts for you. Instead of a blank text box, you answer seven structured questions about your project and the wizard assembles a production-ready prompt that you can paste directly into Claude, ChatGPT, or Gemini.
The wizard walks you through seven focused steps. Each step has sensible defaults, so you can finish a prompt in under two minutes or fine-tune every option.
The wizard sends your selections to a Netlify-hosted serverless function that calls Gemini to assemble the final prompt. Your inputs are never stored, and the response is streamed straight back to your browser.
2prompt generates prompts tuned for the three major general-purpose large language model families: Anthropic Claude, OpenAI ChatGPT, and Google Gemini. Each generated prompt uses neutral phrasing and explicit instruction patterns that all three models interpret reliably. You can paste the output into the system prompt field of Claude Projects, the custom instructions field of ChatGPT, or Gemini's system instruction slot without modification.
Most prompt generators hand you a single template with a few fill-in-the-blank slots. 2prompt takes a different approach: the wizard captures seven structured dimensions of context — clearance, niche, role, flavor, stack, constraints, and custom notes — then composes a layered prompt that includes a persona, a core mission, a technical scope, operational rules, and at the Developer level the full A.N.T. Protocol. The result is a prompt that reads like it was written by a senior prompt engineer, not a form-filler.
Everything is free, there is no sign-up, and no account is required. 2prompt is part of the 2suite ecosystem of privacy-first web tools.
2prompt is client-side except for one step: the final prompt generation call, which is proxied through a Netlify serverless function so the Gemini API key can stay server-side. Your wizard selections are sent to that function, used to build the prompt, and discarded immediately. Nothing is logged, stored, or attached to an identity. Your browser retains only anonymous page-view analytics that you can opt out of entirely.
A master prompt is a detailed system instruction that tells an AI exactly how to behave, what role to play, what constraints to follow, and how to structure its output. Think of it as a comprehensive briefing document for your AI assistant.
The prompts generated by 2prompt are optimised for Claude, ChatGPT, and Gemini. You can paste the output directly into any of these platforms as a system prompt or custom instruction.
No. Everything runs entirely in your browser. Your wizard selections, custom input, and generated prompts never leave your device. We track only anonymous page views and optional feedback.
Absolutely. The generated prompt is a starting point. Copy it, download it, and customise it however you like. The export options (JSON, Markdown, TXT) make it easy to integrate into your workflow.
Clearance levels control the technical depth of the generated prompt. Beginner produces guided, descriptive prompts. Intermediate balances efficiency and control. Developer generates raw, architectural-level instructions.
2prompt is part of a growing family of free, privacy-first web tools: