Chrome extension
Prompt optimizer Chrome extension
If you are comparing prompt tools, the practical difference is where the tool runs. PromptShield runs inside the AI chat you already have open, instead of asking you to keep a second website in your workflow.
What you can compare honestly
PromptShield lets you write a prompt, run Quick Check, read the feedback and the improved version, and then decide. It does not send the prompt for you. It does not claim a score for how much better the answer will be.
It supports ChatGPT, Claude, Gemini, Perplexity, Grok, DeepSeek, and Meta AI’s web chat. It also includes Privacy Guard, Coach, Personalization, a Prompt Library, Optimization History, and more than one language. Personalization and conversation context stay off until you enable them.
- Free: 3 successful optimizations per local day, no credit card
- Pro: $7.99 per month, unlimited optimizations while Pro is active
- Chrome on a computer. No mobile app
- You review the improved prompt before you use it
Why not only a prompt website
A website can teach prompt writing. This site does that. The extension is for the moment you are already in a chat and about to send something vague. You should not have to copy the draft out, optimize it elsewhere, and paste it back every time.
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.
Try the free prompt optimizerQuestions
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.
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.