Chrome extension · ChatGPT
PromptShield reviews what you are already typing in ChatGPT, adds structure and missing context, and lets you apply an improved version before you send.
Free: 3 successful optimizations/day · Pro: unlimited at $7.99/month
No credit card required for Free. Upgrade in Settings → Account.
Interactive preview
Message
best hikes near me
Better prompts start with what you already typed.
PromptShield identifies vague instructions and missing context before you send.
follow up email to client about proposal
PromptShield would add
Draft a concise follow-up email about a proposal I sent last Tuesday.
Subject lines, full email under 120 words, plus a short SMS version.
Turn a quick thought into a clearer, more structured prompt without changing your goal.
write intro for paper on renewable energy
Write an introduction for a college-level paper on renewable energy adoption.
≈400 words, neutral tone, plus 3 research questions for the body.
Save useful originals and optimized versions in your on-device Library and History.
Click a step — or watch the walkthrough cycle.
Message
my react app re renders constantly how do i fix
Every surface matches the extension — not a separate dashboard.
write linkedin posts for our product launch
Create a LinkedIn launch campaign for our B2B SaaS product (PromptShield).
Table of posts, then a full draft of Post 1 under 1,300 characters.
+ 2 more improvements
Marketing — turn a rough ask into a structured campaign brief.
Optimized
Analyze a sales CSV I will paste next message.
Executive summary, chart descriptions, and 3 follow-up questions.
+ 1 more improvement
2 optimizations remaining today
Data analysis — EDA plan, assumptions, and formatted output.
turn my messy notes into a blog outline
Turn my rough notes (next message) into a blog outline about remote team productivity.
Outline first, then 5 drafting interview questions.
+ 5 more improvements
Content creation — outline from messy notes.
Optimized
Decline a recurring team sync invite from my manager — I need focus time this week.
Two complete emails (formal + friendly), under 90 words each.
+ 4 more improvements
1 optimization remaining today
Email writing — polite decline with tone and alternatives.
PromptShield Pro
Unlimited prompt optimizations
$7.99/mo
Same optimizer as Free
Rewrite this resume bullet for a Fintech Product Manager role I am applying to.
Three bullet variants and which reads best for ATS.
+ 4 more improvements
Job applications — resume bullets with metrics and ATS-friendly variants.
One extension. Optimizer, guardrails, and tools you keep on device.
Improve prompts before send. Same quality on Free and Pro.
Surfaces sensitive content in your prompt when Guard is enabled.
Optional guidance and display-language help — not a separate chatbot.
Learns from your choices; stays on your device.
Save prompts you want to reuse.
Revisit optimizations you applied.
Pro removes the daily limit. It does not unlock a different optimizer.
Free
$0
Full optimizer quality
Pro
$7.99 / month
Unlimited optimizations · same optimizer
Upgrade to Pro in Settings → Account inside the extension ($7.99/month).
Pro is $7.99/month · Compare plans
Cloud optimization sends prompts to PromptShield over HTTPS when you request a review. Library, History, and personalization stay on your device. Payments run through Stripe — we never store your full card number.
Common questions
PromptShield is a Chrome extension that reviews the prompt you are writing in ChatGPT, suggests a clearer version with more useful context, and lets you apply it in one click before you send.
You stay in control. PromptShield improves the prompt you already typed — it does not replace your intent or send messages on your behalf.
No. Free and Pro use the same optimizer. Pro removes the daily usage limit (3 optimizations per local day on Free).
Free includes 3 successful prompt optimizations per local day. Usage resets at local midnight.
PromptShield is built for ChatGPT (chat.openai.com).
When cloud optimization is enabled, prompts are sent to the PromptShield Intelligence API over HTTPS for optimizer, coach/translation, and related features. Provider API keys stay on PromptShield servers — not in the extension.
No. Stripe processes payments. PromptShield does not store full card numbers on marketing servers or in the extension.
Yes. Open Settings → Account in the extension and use the Stripe customer portal to cancel. Access continues through your current billing period.
Yes. Sign in with the same verified email in Settings → Account. Entitlements sync from your PromptShield account.
Yes — visit the Download page to install PromptShield for Chrome. Pro billing is live in Settings → Account inside the extension.
Install PromptShield on ChatGPT — 3 free optimizations per day, or unlimited with Pro at $7.99/month.
