AI prompt builder
Describe what you want in plain words. Get a complete, well-structured prompt for the AI model of your choice: clear, concise, and never padded with things you didn’t ask for.
Role: Senior code reviewer. Task: Review the attached PR diff for bugs, unclear variable/function names, and style issues. Output format: Inline comments grouped by file, each tagged [Critical] or [Minor]. Constraints: Do not suggest unrelated refactors outside the diff.
Call it as an MCP tool from Claude Desktop, Claude Code, Cursor, Copilot, Gemini CLI, Antigravity, and more — POST /api/mcp
Prompt builder by AI model
Pick the AI you are writing for and open the builder tuned for it.
- Claude prompt generatorPrompts wrapped in descriptive XML tags, the structure Claude is trained to follow closely.
- Gemini prompt generatorClear Markdown sections with concrete constraints, and the most important instruction first.
- Grok prompt generatorDirect, plain Markdown sections with concrete constraints and an explicit output format.
Stop Staring at a Blank Prompt Box
Most people know what they want from ChatGPT, Claude or Gemini but not how to phrase it. Vague requests get vague answers. Prompt Builder takes your rough idea and writes the prompt for you: the task, the context that matters, sensible constraints and the output format.
It follows one rule: better, not longer. Your intent stays exactly as you stated it, nothing is invented, and details only you know are left as clear placeholders.
How It Works
1. Describe your idea
A sentence or a few lines is enough. Say what you want the AI to do, not how to prompt it.
2. Pick the model
Choose the AI you'll use, a use case and how detailed the prompt should be. The structure adapts to how that model reads best.
3. Copy a lean prompt
Get a ready-to-paste prompt with no filler. Fill in any [placeholders], then run it — or refine it with the other tools.