Live Quality Scoring
As you type, our algorithm evaluates your prompt's clarity and context depth in real-time, assigning a score out of 10.
Promptuner|AI Prompt Optimizer
Your Prompts Are Holding Your AI Back.
Promptuner scores your prompts in real-time, pinpoints exactly what's missing, and rewrites vague requests into structured, persona-driven commands — right in your browser. Fewer retries. Better outputs. Faster results.
JD
AR
MK
10,000+
Active Engineers
Watch how Promptuner transforms your prompts in seconds
10,000+Active Users
2M+Prompts Optimized
68%Avg. Score Improvement
< 3sAvg. Optimization Time
// Core Engine
Get Better Results from
Every AI Conversation
Stop guessing what the AI wants. Let our extension analyze, score, and rebuild your context dynamically.
1-Click Refactor
Score too low? Hit the magic button. Promptuner instantly refactors your vague idea into a token-optimized instruction set.
Smart Clarification
If missing critical context, the extension pops up to ask targeted questions, ensuring the final prompt is bulletproof.
// Who Is It For?
Built for anyone who talks to AI daily
Whether you're shipping code or crafting copy, Promptuner adapts to your workflow.
Software Developers
Stop re-prompting the same context. Define your stack, coding style, and constraints once — Promptuner injects them automatically every time.
Code reviewRefactoringDocs generation
AI Researchers
Evaluate and compare prompt structures systematically. The live scorer gives you a consistent metric to benchmark prompt quality across experiments.
BenchmarkingTemplate libraryStructured output
Marketers & Copywriters
Turn rough ideas into polished, persona-driven copy instructions. Get consistent brand voice by saving and reusing your best-performing templates.
Brand voiceAd copyContent briefs
Indie Hackers & Founders
Ship faster by getting the right AI output on the first try. The intercept popup fills in the context gaps before you waste tokens on a bad response.
Product specsEmail draftsMarket research
// Real-time Evaluation
Stop guessing.
Know your prompt's strength.
Promptuner injects a live score meter directly into the ChatGPT and Claude interfaces. It analyzes word choice, constraints, and goal clarity on the fly.
- Vague instruction detection
- Persona constraint checking
- Automatic token optimization hints
compiler_diagnostics.log Active Analysis
Context Density
WARN
Persona Definition
FAIL
Token Efficiency
PASS
42/100
Prompt is too vague. Clarification needed.
// Smart Interception
It asks questions,
so the AI doesn't have to.
When you try to submit a low-scoring prompt, Promptuner intercepts it. A sleek popup asks you the exact questions needed to fill the context gaps dynamically within the DOM.
PROMPTUNER_INTERCEPT
Score is 42/100. Let's fix that.
Q: What is the primary framework you are using?
> Next.js App Router with Tailwind CSS|
// Command Palette
Your prompt library,
always one shortcut away.
Save your best generated prompts locally. Hit Cmd+Shift+P anywhere on the web to pull up your command palette and inject templates instantly into any text box.
// Local Workspace
React Refactor Master
"You are a senior React developer..."
Inject
API Endpoint Doc Gen
"Create swagger documentation for..."
Marketing Copywriter
"Write an engaging landing page copy..."
// Proof of Concept
See the difference in seconds
The same idea — one vague, one bulletproof. Promptuner bridges the gap automatically.
Before Promptuner12 / 100
“Write me some code to fetch data from an API and display it on the page.”
- No language or framework specified
- No error handling requirements
- No output format defined
- No persona or expertise level
After Promptuner96 / 100
“You are a senior Next.js 14 developer with deep expertise in TypeScript and React Server Components. Write a fetchUserData() utility function that: (1) Uses the native fetch API with proper error handling and TypeScript generics, (2) Returns a typed response object with { data, error, loading } states, (3) Handles network timeouts with a 5s AbortController signal, (4) Follows the App Router data-fetching conventions. Output only the function and its type definitions — no explanations.”
- Persona & expertise defined
- Output format specified
- Constraints & edge cases included
- Technology stack locked in
Trusted by 10k+ Engineers
Read the logs from our active user base.
"The live scoring feature is a game changer. It trained me to stop writing lazy prompts. My API costs dropped because I get the right answer on the first try now."
AD
@alex_dev
Senior Full-Stack
"I used to maintain a Notion document full of prompt templates. Now I just use Promptuner's popup to refine my thoughts natively inside Claude. Flawless execution."
SM
@sarah_ml
AI Researcher
"Best $7.99/mo I spend. The DOM injection means it feels like a native feature of ChatGPT. The 'Enhance' button is basically magic."
JC
@josh_codes
Indie Hacker
// Security & Privacy
Built with trust in mind.
Enhancement requests go through our secure proxy — your prompts are never logged, sold, or used for training.
Secure API Proxy
Enhancement requests are routed through our own endpoint — never directly from your browser to Anthropic. Your API key is never exposed.
No Prompt Logging
We do not store, log, or train on the content of your prompts. Requests are forwarded and immediately discarded on our end.
No Account Required on Free Tier
Start optimizing immediately. The free plan stores your prompt library locally using browser storage — no signup, no tracking.
Minimal Permissions
The extension only requests access to supported AI platform tabs. It cannot read your other browser activity or history.
// Knowledge Base
From the Blog
·8 min read
How to Write Effective System Prompts for ChatGPT, Claude, and Gemini
Learn how to architect system prompts for ChatGPT, Claude, and Gemini. Covers persona, scope, constraints, and format directives with production-ready templates.
·7 min read
How to Optimize ChatGPT Prompts: A Developer's Complete Guide
Learn how to write optimized ChatGPT prompts that reduce token waste, improve output quality, and get the right answer on the first try.
·8 min read
What is Prompt Engineering? The Developer's Guide to AI Context
Prompt engineering is the practice of structuring AI inputs to reliably produce high-quality outputs. This guide explains the mechanics and why context is everything.
// Plans
Transparent Pricing
Free
For casual prompt engineering.
$0/mo
- 5 Enhancements per day
- Basic Live Scoring
- Local Prompt Templates
- AI-Powered Follow-up Questions
- Custom Templates
RECOMMENDED
Pro
For professionals maximizing AI output.
$7.99/mo
Everything in Free, plus:
- Unlimited Enhancements
- Prompt Marketplace Access
- Advanced Scoring — Tone, Clarity & Intent
- Synced Prompt Templates Across Devices
- Priority Support
// FAQ
Common Questions
Stop Writing Bad AI Prompts
Join top-tier developers and professionals who stopped writing bad prompts.
Install the Extension// Elevate your AI workflow today.