Writing demo
Free AI prompt optimizer
Paste a rough prompt, or start from an example. You will see a clearer version and a short note on what changed. This page is a local demo. The Chrome extension runs Quick Check inside the chat you already use.
Local demo, not a live model
What this page does
A useful prompt usually says what you want, what the model needs to know, what to avoid, and how the answer should look. The demo on this page shows that structure with written examples. If your text is not one of those examples, it keeps your words and adds the same four labels so you can see the shape.
That local pass is not PromptShield Quick Check. Quick Check runs in the extension, returns feedback, and waits for you to accept or ignore the improved version. Nothing is sent to the chat automatically.
Use it where you already chat
A separate prompt website is easy to forget. PromptShield sits beside the composer in seven AI chats: ChatGPT, Claude, Gemini, Perplexity, Grok, DeepSeek, and Meta AI. You write normally, run Quick Check, and review the result before you use it.
The free plan includes 3 successful optimizations per local day. No credit card is required. Pro is $7.99 per month for unlimited optimizations while the subscription is active.
Before and after
A written comparison, not a live optimization. Use it to see what specificity changes.
Rough prompt
help me study for my calculus exam
Clearer prompt
Help me study for a calculus exam. I know algebra and I am new to limits. Teach one idea, then give me one problem and wait.
The shorter version names the level and how practice should work.
Prompt checklist
A useful check before you send. It is not a scientific requirement, and a short prompt can still be enough when the chat already has the missing pieces.
Want PromptShield inside the chat?
PromptShield works in ChatGPT, Claude, Gemini, and four other AI chats. You review the improved prompt before you use it. The free plan includes 3 successful optimizations a day, and no credit card is required.
PromptShield installs in Chrome on a computer. It is not a mobile extension. Copy the install link and open it later in desktop Chrome.
Questions
Quick Check sends the prompt to PromptShield over HTTPS so it can return feedback and an improved version. PromptShield does not send that prompt to the AI chat for you. You review the result and decide whether to use it. Optional conversation context stays off until you turn it on.
PromptShield is a Chrome extension for desktop Chrome. It works inside ChatGPT, Claude, Gemini, Perplexity, Grok, DeepSeek, and Meta AI’s web chat. It is not a mobile app, and Meta AI support is not a Facebook or Instagram integration.
No. Matching example prompts show a rewrite we wrote ahead of time. Anything else is a fixed local template that keeps your sentence as the goal. The page says which one you are looking at.