Free AI Prompt Optimizer

Free AI Prompt
Optimizer

Optimize Prompts for Any AI Platform

PromptOptimizr is a free AI prompt optimizer that transforms vague instructions into precisely engineered prompts for ChatGPT, Claude, Gemini, Cursor, and Claude Code. Get better AI responses on the first try and completely free.

Start Optimizing FreeCompare Plans
What You Get

Everything You Need to Start

10
Prompts / Month

Optimize up to 10 prompts every month, completely free.

5
AI Targets

ChatGPT, Claude, Gemini, Cursor, and Claude Code.

3
Optimization Styles

Concise, Detailed, and Step-by-Step modes included.

How It Works

Optimize Prompts in Three Steps

Paste Your Prompt

Drop your raw prompts into the workspace editor.

Select Model & Style

Choose your target AI model and preferred output style from the control panel.

Get Optimized Prompt

Receive a production-ready, refined prompt with one click export or inside your chats with the Chrome extension.

Plans

Free vs Paid Plans

Feature
Free
Starter
Max
Monthly Prompts
10
600
2,000
Daily Limit
5
25
100
AI Targets
All 5
All 5
All 5
Optimization Styles
All 3
All 3
All 3
Chrome Extension
✓
✓
✓
Input Limit
1x
2.5x
5x
Price
$0
$7.99/mo
$19.99/mo
FAQ

Frequently Asked Questions

Is PromptOptimizr really free?

Yes. The free plan gives you 10 optimized prompts per month with access to all 5 AI targets and all 3 optimization styles. No credit card required, no trial period, it’s free forever.

What counts as one prompt?

Each time you optimize a prompt through PromptOptimizr, whether via the web app or the Chrome extension, it counts as one prompt. Selecting different optimization styles for the same input counts as separate prompts.

Which AI models does the free plan support?

All five: ChatGPT, Claude, Gemini, Cursor AI, and Claude Code. There are no model restrictions on any plan.

Do I need a credit card to sign up?

No. Create your account and start optimizing immediately. We only ask for payment information if you choose to upgrade to a paid plan.

What happens when I hit the monthly limit?

Your prompt count resets at the start of each calendar month. If you need more prompts, you can upgrade to Starter ($7.99/mo) or Max ($19.99/mo) at any time.

Is the Chrome extension free too?

Yes. The Chrome extension is free for all users. It lets you optimize prompts directly inside ChatGPT, Claude, and Gemini without switching tabs.

What’s the difference between optimization styles?

Concise produces tight, efficient prompts. Detailed adds context and specificity. Step-by-Step breaks your request into sequential instructions. All three are available on every plan.

Start Optimizing Your
AI Prompts for Free

No credit card. No trial. Just better prompts for ChatGPT, Claude, Gemini, Cursor, and Claude Code.

Get Started Free