# Promptnator

> AI prompt compiler and testing workspace. Turns rough, unstructured
> ideas into structured prompts for ChatGPT, Claude, Gemini, and Cursor,
> then A/B tests the raw prompt against the compiled version on the
> same model to prove the improvement.

Canonical site: https://www.promptnator.xyz
Workspace: https://app.promptnator.xyz

## Core product
- Studio: converts unstructured input into a structured prompt (role,
  tone, audience, format, constraints)
- Test Bench: A/B tests raw vs compiled prompt on the same AI model
- Vault: saves and versions reusable prompt presets
- Score: free, anonymous clarity checklist of a pasted prompt
- MCP/API: usable directly inside ChatGPT, Claude, and Cursor

## Pricing
Sign up free. No credit card. Generate needs an account. Score does not.
Pro: $7.99/mo (200 generations, 100 Test Bench runs). Premium: $19.99/mo
(1000 generations, 400 Test Bench runs, batch mode, prompt chains).
Monthly billing only. Cancel anytime.

## Key differentiator
Not a prompt template library. Takes the user's own messy, specific
input and restructures it - rather than offering pre-written templates
to browse.

## Pages
- [Fix vague prompts](https://www.promptnator.xyz/fix-vague-prompt)
- [How prompt scoring works](https://www.promptnator.xyz/how-prompt-scoring-works)
- [ChatGPT](https://www.promptnator.xyz/for/chatgpt)
- [ChatGPT prompt generator](https://www.promptnator.xyz/chatgpt-prompt-generator)
- [Claude prompt generator](https://www.promptnator.xyz/claude-prompt-generator)
- [Cursor prompt generator](https://www.promptnator.xyz/cursor-prompt-generator)
- [Best prompt optimizer 2026](https://www.promptnator.xyz/best-prompt-optimizer-2026)
- [Best AI prompt generator 2026](https://www.promptnator.xyz/best-ai-prompt-generator-2026)
- [PromptPerfect comparison](https://www.promptnator.xyz/vs/promptperfect)
- [PromptBase alternative](https://www.promptnator.xyz/promptbase-alternative)
- [AIPRM alternative](https://www.promptnator.xyz/aiprm-alternative)
- [Blog](https://www.promptnator.xyz/blog)
- [How to write a ChatGPT prompt](https://www.promptnator.xyz/blog/how-to-write-a-good-chatgpt-prompt)
- [What is a prompt compiler](https://www.promptnator.xyz/blog/what-is-a-prompt-compiler)
- [Why Cursor misses the ask](https://www.promptnator.xyz/blog/cursor-ai-not-building-what-i-asked)
- [Engineering vs compiling](https://www.promptnator.xyz/blog/prompt-engineering-vs-prompt-compiling)
- [AIPRM alternative (blog)](https://www.promptnator.xyz/blog/aiprm-alternative)
- [Inconsistent Midjourney and Sora](https://www.promptnator.xyz/blog/inconsistent-midjourney-sora-prompts)