# PromptOptimizr

> PromptOptimizr is an AI prompt optimization platform that transforms rough prompts into refined, platform-specific instructions for ChatGPT, Claude, Gemini, Cursor, and Claude Code. It achieves an average 37% token reduction while improving output quality. Free to start at https://www.promptoptimizr.com

For full details, see: https://www.promptoptimizr.com/llms-full.txt

## About

PromptOptimizr is a prompt engineering platform that analyzes prompt intent, adds missing context, and restructures instructions for each AI model's architecture. Each model receives different formatting: Markdown headers and role assignment for ChatGPT, XML tags and constraint boundaries for Claude, sandwich structure and grounding instructions for Gemini, @-references and file-scoped instructions for Cursor, and verification-first outcome criteria for Claude Code. Users choose from 3 optimization styles: Concise (tight, efficient prompts), Detailed (adds context, examples, specificity), and Step-by-Step (sequential instructions for multi-part tasks).

## Key Facts

- Average 37% token reduction on optimized prompts
- 10,000+ prompts optimized to date
- 5 AI models supported: ChatGPT, Claude, Gemini, Cursor, Claude Code
- 3 optimization styles: Concise, Detailed, Step-by-Step
- Each model gets different formatting (Markdown for ChatGPT, XML for Claude, sandwich structure for Gemini, @-references for Cursor, verification-first for Claude Code)
- Free tier: 10 prompts/month, no credit card required
- Chrome extension works inside ChatGPT, Claude, and Gemini web interfaces

## Pages

- [Home](https://www.promptoptimizr.com/): Main landing page with live demo, features, and model comparison table
- [Chrome Extension](https://www.promptoptimizr.com/extension): Browser extension that injects optimization directly into ChatGPT, Claude, and Gemini
- [Pricing](https://www.promptoptimizr.com/pricing): Free ($0, 10/mo), Starter ($7.99, 600/mo), Max ($19.99, 2000/mo)
- [Free Prompt Optimizer](https://www.promptoptimizr.com/tools/free-prompt-optimizer): Free tool page for prompt optimization
- [Prompt Enhancer](https://www.promptoptimizr.com/tools/prompt-enhancer): Tool page for enhancing AI prompts
- [Best Prompt Optimizer](https://www.promptoptimizr.com/tools/best-prompt-optimizer): Comparison and review of prompt optimization tools
- [ChatGPT vs Claude Prompts](https://www.promptoptimizr.com/compare/chatgpt-vs-claude-prompts): Side-by-side comparison of prompt formatting differences
- [For Developers](https://www.promptoptimizr.com/for/developers): How developers use prompt optimization for coding with Cursor and Claude Code
- [For Students](https://www.promptoptimizr.com/for/students): How students use prompt optimization for research and academic writing
- [For Content Creators](https://www.promptoptimizr.com/for/content-creators): How creators use prompt optimization for blogs, social media, and newsletters
- [Blog](https://www.promptoptimizr.com/blog): Articles on prompt engineering, AI model differences, and optimization techniques

## Prompt Templates (248 pages)

Optimized prompt templates for every major AI model across 74 use cases:
- [ChatGPT Prompts](https://www.promptoptimizr.com/prompts/chatgpt/write-a-cover-letter): Markdown-formatted templates with role assignment for GPT models
- [Claude Prompts](https://www.promptoptimizr.com/prompts/claude/write-cold-email): XML-tagged templates optimized for Claude's instruction processing
- [Gemini Prompts](https://www.promptoptimizr.com/prompts/gemini/create-marketing-plan): Sandwich-structured templates with grounding for Gemini
- [Cursor Prompts](https://www.promptoptimizr.com/prompts/cursor/debug-code): Code-focused templates with @-references for IDE context
- [Claude Code Prompts](https://www.promptoptimizr.com/prompts/claude-code/build-rest-api): Verification-first templates for agentic CLI workflows

## How It Works

1. Paste your raw prompt into the workspace editor
2. Select your target AI model (ChatGPT, Claude, Gemini, Cursor, or Claude Code) and output style (Concise, Detailed, or Step-by-Step)
3. Get a production-ready optimized prompt with one-click export or via the Chrome extension

## Machine-Readable Data

- Brand facts (JSON): https://www.promptoptimizr.com/.well-known/brand-facts.json
- AI plugin manifest: https://www.promptoptimizr.com/.well-known/ai-plugin.json

## Contact

- Website: https://www.promptoptimizr.com
- GitHub: https://github.com/promptoptimizer
- Twitter: https://twitter.com/promptoptimizer