Prompt engineering studio · runs in your browser

Rough prompt in. Production prompt out.

Q: What is PromptMaster Studio?

PromptMaster Studio is a browser-based prompt engineering tool by Neal Frazier Tech. It lints and scores your prompt, estimates token cost, and rewrites it into a structured format for Claude (XML), OpenAI chat, Google Gemini or chain-of-thought reasoning.

Q: Are my prompts sent to a server?

No. Linting, scoring and rewriting run in JavaScript inside your browser. Your prompt text is not uploaded. Payments are handled by Stripe or by your own Solana wallet.

Q: What does PromptMaster Studio Pro unlock?

Pro unlocks the full optimized output for every target format (Claude XML, OpenAI, Gemini and chain-of-thought), copy and export, and unlimited optimizations in that browser.

Q: How much does Pro cost? Is it a subscription?

Pro is a one-time payment of $19 for lifetime access to the web studio. There is no subscription and no recurring charge.

Q: What is the refund policy?

Every purchase has a 30-day money-back guarantee. Email support@nealfrazier.tech with your Stripe receipt email or Solana transaction signature within 30 days for a full refund. Details are in the Terms of Service.

Q: Can I pay with crypto?

Yes, when crypto checkout is enabled you can pay in USDC on Solana with any Solana Pay compatible wallet such as Phantom or Solflare. Card, Apple Pay and Google Pay go through Stripe.

Q: How do I use Pro on another browser or device?

Pro is remembered in the browser you paid in. To unlock another browser, open the restore link shown after checkout, or use Restore access and paste your Stripe checkout session ID or Solana transaction signature. If you lose it, email support with your receipt.

PromptMaster Studio lints, scores and rewrites your prompts for Claude, ChatGPT, Gemini and chain-of-thought in seconds. It all runs on your device, so nothing gets uploaded.

Optimize a prompt free See Pro pricing

No sign-up to try
Pro is $19 once
30-day money-back guarantee

Silent product reel: lint → score → rewrite

Privacy

Runs 100% in your browser

Targets

Claude XML · OpenAI · Gemini · CoT

Price

$19 one-time, no subscription

Guarantee

30-day money-back

// how it works

How does PromptMaster Studio improve a prompt?

It takes three steps and about ten seconds. Paste your prompt, read the lint report, then pick the model you're targeting and get a restructured version back.

Paste or pick a template

Drop in any rough prompt, or start from a built-in template. Variables like {{ role }} are detected so you can fill them in live.
Free
Lint & score instantly

The linter flags negative constraints, vague directives, injection risks and broken variables. It scores clarity, security and structure and estimates token cost per model.
Free, unlimited
Optimize for your model

Choose Claude XML, OpenAI chat, Gemini or chain-of-thought and get a structured prompt with clear roles, rules and output format.
1st full result free · Pro for the rest

// the studio

Try it now: optimize a prompt free

Paste a prompt or choose a template, then press Meta-Optimize. Linting, scores and token costs are free and unlimited.

Free taste: your first optimized prompt is shown in full.

✍️ Prompt & Template Editor

Target Architecture:

✨ Optimized Model Output

Click 'Meta-Optimize Prompt' or type in the editor to see live transformed output...

Preview: first lines shown

Unlock the full optimized prompt

Pro shows the complete output for every target, with copy & export. $19 once · 30-day refund.

🛡️ Prompt Quality & Safety

100 / 100

100

Clarity

100

Security

100

Structure

1.0

Pos/Neg Ratio

Static Linter Issues 0 found

✅ No quality or security issues detected.

📊 Tokens & Cost Estimator

Tokens

Words

Model	Est. Input Cost	Context Fit
GPT-4o	$0.00000	✅ Safe
Claude 3.5 Sonnet	$0.00000	✅ Safe
Gemini 1.5 Pro	$0.00000	✅ Safe

// pricing

How much does PromptMaster Studio cost?

It's free to try. Pro is a one-time payment of $19 for lifetime access to the web studio. There's no subscription, and every purchase is covered by a 30-day money-back guarantee.

Free

Everything you need to find out what's wrong with a prompt.

Linter: negative constraints, vague directives, injection risks, broken variables
Clarity, security & structure scores
Token & cost estimator
Prompt diff and local version history
Built-in templates & curriculum
Your first optimized prompt in full; after that, a preview of each result

Start free in the studio →

Pro · Lifetime

one-time payment

$19once, yours to keep

Everything in Free, plus the full optimizer.

Full optimized output for every targetClaude XML, OpenAI chat, Google Gemini and chain-of-thought
Copy & export optimized promptsOne click to clipboard or a .txt file
Unlimited optimizationsNo daily caps and no credits
Commercial use of your outputsUse them in client and production work, as set out in the Terms
Future web-studio updates includedNo upgrade fees

Card, Apple Pay & Google Pay via Stripe 30-day refund policy

// questions

Frequently asked questions

Short, straight answers. If yours isn't here, ask the support desk or email support@nealfrazier.tech.

What is PromptMaster Studio?

A browser-based prompt engineering tool by Neal Frazier Tech. It lints and scores your prompt, estimates token cost, and rewrites it into a structured format for Claude (XML), OpenAI chat, Google Gemini or chain-of-thought reasoning.

Are my prompts sent to a server?

No. Linting, scoring and rewriting run in JavaScript inside your browser, and your prompt text is never uploaded. Payments are handled by Stripe or by your own Solana wallet. See the Privacy Policy.

What can I do for free?

Almost everything except the full optimizer output. The linter, quality scores, token and cost estimator, prompt diff, version history, templates and curriculum are free and unlimited. Your first optimized prompt is shown in full. After that, each optimized result shows a preview of its first lines.

What does PromptMaster Studio Pro unlock?

The complete optimizer. You get the full optimized output for all four targets (Claude XML, OpenAI, Gemini, chain-of-thought), copy and export, and unlimited optimizations in the browser you unlocked.

How much does Pro cost? Is it a subscription?

$19, once. It's a single payment for lifetime access to the web studio, with no subscription and no recurring charge.

What is the refund policy?

Full refund within 30 days, no questions asked. Email support@nealfrazier.tech with your Stripe receipt email or Solana transaction signature. The full policy is in the Terms of Service, and you can also open a ticket at the support desk.

Can I pay with crypto?

Not at the moment. Checkout currently takes card, Apple Pay and Google Pay through Stripe.

How do I use Pro on another browser or device?

Use your restore link. Pro is remembered in the browser you paid in. After checkout you'll see a restore link you can open on any other browser. You can also choose and paste your Stripe checkout session ID or Solana transaction signature. If you lose both, email support with your receipt.

Ship prompts that hold up in production.

Try the free linter and your first full optimization now. Upgrade only if it earns its place in your workflow.

Optimize a prompt free