The Claude Prompt Improver
Claude rewards clear, structured prompts. Type a rough one, hit a single button, and PromptChief rewrites it into a clean, XML-structured prompt — right inside claude.ai.
↑ A rough prompt becomes a clear, structured one in a single click — preview, refine, use. (Demo, no sound.)
Why Claude needs better prompts
Anthropic's own guidance is blunt: give Claude an explicit role, clear instructions, and XML tags to separate the parts of your request. Most people don't — so Claude guesses. The improver does it for you. (Some call this a Claude prompt optimizer or Anthropic prompt optimizer — same idea: better-structured prompts, better answers.)
summarize this report and tell me what to do about churn
<role>You are a senior retention analyst.</role> <task>Summarize the attached report, then recommend actions to reduce churn.</task> <context>Audience: the founder. Keep it decision-ready.</context> <output_format> 1. 3-bullet summary 2. Top 3 churn drivers 3. Prioritized actions w/ expected impact </output_format>
How it works
Open claude.ai
Type your prompt the lazy way in Claude's composer — half an idea is enough.
Hit ✨
Click the spark in the composer or press Ctrl+Shift+E.
Pick XML style
Choose the XML style (or one of 8 others) for Claude-friendly <role>/<task>/<output_format> tags.
Refine & use
Nudge it in plain English ("shorter", "add examples"), then drop it into Claude — or save it.
Built for the way Claude works
Claude-friendly XML
Wraps your prompt in <role>, <task>, <context> and <output_format> tags — exactly the structure Anthropic recommends.
Role + structure
Assigns an expert role, then orders task → constraints → steps → output, so Claude stops guessing what you meant.
Preview before you send
Nothing reaches Claude until you say so. See the rewrite, compare, and only then Use it.
Refine in plain English
Type "shorter", "more formal" or "add a JSON output" and the improver adjusts on the spot.
Save your best Claude prompts
Use + Save keeps the improved prompt in your library with [[placeholders]] to reuse next time.
Privacy-first
Only the prompt you choose to improve is sent. Your Claude chats are never read; history stays local.
Free on every plan
Each improve uses one AI credit (shared with Markdown generation). Start free — no card, no account needed.
AI credits per month. See full pricing & plans →
Improve your Claude prompts free
Add PromptChief to Chrome, open claude.ai, type a rough prompt and hit ✨. You get 10 free improves every month — no account required to start.
Add PromptChief free →Frequently asked questions
What is the Claude Prompt Improver?
It's a one-click prompt improver built into the PromptChief browser extension that works directly inside claude.ai. You type a rough prompt, hit the ✨ button (or Ctrl+Shift+E), and it rewrites it into a clearer, better-structured prompt — including Claude-friendly XML formatting — with a live preview you can refine, use or save.
Why does Claude work better with structured prompts?
Anthropic recommends giving Claude clear roles, explicit instructions and XML tags like <task>, <context> and <output_format> to separate the parts of a prompt. The Claude Prompt Improver applies that structure automatically, so Claude knows exactly what you want.
Is the Claude Prompt Improver free?
Yes. Every plan includes AI credits each month: 10 on Free, 100 on Plus and 300 on Pro. Each improve uses one credit, shared with Markdown generation. No account is needed to start on Free.
Does it only work in Claude?
No. The same improver works inside 27 AI platforms including ChatGPT, Gemini, Copilot, Grok, Perplexity and DeepSeek — the XML style is simply a great fit for Claude specifically.
Does PromptChief read my Claude conversations?
No. Only the prompt text you choose to improve is sent to be rewritten. PromptChief never reads your conversations, and your prompt history stays local on your device.