Craft Flawless AI Prompts. Get Superior Outputs.
Transform rough text into precise instructions for ChatGPT, Claude, Gemini, and DeepSeek — 100% free, with API keys encrypted at rest.
// Universal LLM Instruction Architecture
Seamless Prompt Generation & Context Carry Across All Leading AI Models
Engineered for prompt precision
Every feature designed to eliminate hallucination, enforce strict constraints, and produce deterministic outputs.
Instant AI Instruction Compilation
Transform raw 5-word thoughts into structured Role, Context, Task, and Non-Negotiable Constraint blocks tailored for any LLM.
6-Dimension Quality Score
Real-time scoring across clarity, specificity, constraints, role alignment, and token efficiency.
Side-by-Side Model Lab
Compare outputs simultaneously across GPT-4o, Claude 3.5 Sonnet, Gemini 2.0, and DeepSeek.
Reusable Context Memory & Vault
Store project tech stacks, brand guidelines, and coding standards into persistent memory blocks automatically injected into prompts.
From rough idea to production prompt in 3 steps
No prompt-engineering knowledge needed. Paste, choose your depth, and copy.
Type your idea
Paste or dictate any rough thought — a blog topic, a code request, a marketing brief. No formatting needed.
Pick your level
Quick for concise structure, Deep for full role/context/steps, or Expert for chain-of-thought reasoning.
Use it anywhere
Copy, open in ChatGPT/Claude/Gemini with one click, or inject it live via the free Chrome extension.
Use Prompt+ directly inside ChatGPT & Claude
Install the free Chrome extension to enhance prompts right in your active conversation with zero tab switching.
Free. Forever. No quotas, no paywall.
Every competitor charges $9–19/month. Prompt+ is 100% free with no credit card and no daily caps.
Prompt+ Complete
$0 / lifetime
Empirically grounded prompt engineering
Prompt+ isn't based on guesswork. Our Architect Engine compiles prompts using peer-reviewed research from top AI laboratories.
Chain-of-thought reasoning
Forces step-by-step intermediate reasoning paths before the final answer.
Structural role boundaries
Establishes explicit Role, Context, Instructions, and Non-Negotiable Constraints to prevent context drift.
Few-shot in-context learning
Structures input variable placeholders and example ordering to maximize LLM adherence.
Questions? We've got answers
Yes — free to use, no credit card. Enhancements run on a built-in deterministic engine, or fully on-device with Chrome's Gemini Nano, so it costs us almost nothing to keep it free.
Ready to upgrade your AI workflow?
Start generating higher quality AI responses today with Prompt+. No credit card required.