Prompt Sharpener

About

Sharper prompts, better answers — in one tap.

Prompt Sharpener adds battle-tested instruction phrases to the beginning or end of any chat box, so you get more accurate, more useful answers from Claude, ChatGPT, Gemini, Copilot, Perplexity, and beyond.

Unlike prompt "enhancers" that ship your text off to an AI and rewrite it, Prompt Sharpener never touches your wording or your data. It just drops in the right instruction — "flag anything you're unsure of," "walk me through your reasoning," "tell me what you'd need to know first" — the phrases that reliably raise answer quality.

Why you'll want it:

• One tap or one hotkey. Insert from the popup, or fire your top four phrases with Alt+Shift+1–4 without leaving the keyboard.
• Start or end. Drop a phrase at the top of your prompt or tack it on at the end — your choice.
• Ten proven phrases, ready to go. A curated starter set covering accuracy, reasoning, brevity, and more — every one editable.
• Make it yours. Add, edit, reorder, and label your own phrases in a built-in editor. Import/export as JSON to back up or share.
• Works everywhere. Textareas, inputs, and rich editors alike — including the ProseMirror boxes Claude and ChatGPT use.
• Private by design. No account, no servers, no AI calls. Your phrases sync across your own Chrome profile and go nowhere else.

Stop retyping the same instructions. Sharpen every prompt in a keystroke.