The prompt enhancer for Claude
One click inside claude.ai turns a rough sentence into a structured prompt with role, context, constraints, and output format. Claude follows output specifications more strictly than any other major model — which makes it the model where prompt enhancement pays off most.
Free to try, no account needed for the demo. The extension covers claude.ai; the Mac app covers Claude Code and Claude Desktop with a ⌘⇧P hotkey.
Same engine as the Claude integration — try it right here, then install it where you work.
What is a Claude prompt enhancer?
A Claude prompt enhancer restructures your plain-language request into the format Claude responds to best: a clear role, the context behind the ask, ordered instructions, explicit constraints, and a defined output format. You write the request the way you'd say it; the enhancer builds the scaffolding.
Enhancement matters more for Claude than for other models because of how Claude is trained. Claude adheres to output specifications unusually strictly — tell it "exactly four sections, each under 80 words, no preamble" and that is what you get. That strength cuts both ways: a vague prompt gets a well-written but generically-shaped answer, while a structured prompt gets exactly the shape you asked for. The delta between vague and structured is bigger on Claude than anywhere else.
PromptAI covers both places you use Claude. In the browser, the Chrome extension adds an enhance button inside claude.ai — chats, Projects, and Artifact requests. On macOS, the desktop app adds a global ⌘⇧P hotkey that works inside Claude Code and Claude Desktop, covered in depth on the Claude Code page.
Every place you talk to Claude
Same enhancement engine, two delivery surfaces: the Chrome extension for claude.ai, the Mac app for Claude Code and Claude Desktop.
Claude chat
Writing, analysis, and long-document work on claude.ai. Claude's strict instruction-following means an enhanced prompt with explicit format constraints produces exactly the output shape you asked for, on the first try.
Artifacts
When you ask Claude to build an artifact — a page, a dashboard, an interactive demo — the difference between a vague ask and a structured spec is the difference between three revision rounds and one. Enhanced prompts read like mini design briefs.
Projects
Project custom instructions are a standing system prompt. Enhance them once and every conversation in that Project inherits the structure — role, tone, constraints, and preferred output formats.
Claude Code and Claude Desktop
The Mac app's ⌘⇧P hotkey enhances highlighted text in any native macOS app, including Claude Code in your terminal. Structured task briefs keep agentic coding sessions scoped and reviewable.
Before and after: real Claude prompts
Long-document analysis — claude.ai
read this report and tell me the important stuff
You are a strategy analyst preparing an executive briefing. Read the report I paste below and produce: (1) a 3-sentence executive summary, (2) the five most decision-relevant findings as bullets, each with the page or section it came from, (3) a 'what the report avoids saying' section flagging gaps or hedged claims. Constraints: no restating of methodology, under 350 words total, quote figures exactly as written.
Building an Artifact
make me a dashboard for my sales data
You are a frontend engineer building a single-file interactive artifact. Create a sales dashboard that accepts pasted CSV data with columns: date, rep, region, amount. Show: a monthly revenue line chart, a top-5 reps bar chart, and a region breakdown donut. Requirements: dark theme, one accent color, responsive layout, a paste-area with a 'Load data' button, and sensible empty states. Use vanilla JS and inline styles only — no external libraries.
Editing your writing
make this sound better
You are a line editor for a business audience. Edit the text I paste below for clarity and rhythm while preserving my voice and all factual claims. Rules: cut filler and hedging, prefer short declarative sentences, keep technical terms, do not add new claims. Output format: the edited text first, then a bullet list of the five most significant changes with one-line reasons.
Set up in under a minute
Pick your surface
Install the Chrome extension for claude.ai, or download the Mac app for Claude Code and Claude Desktop. One account covers both.
Write the request naturally
Type what you want the way you'd tell a colleague. No templates, no XML tags, no scaffolding.
Enhance in place
Click the button (browser) or hit ⌘⇧P on highlighted text (Mac). The structured prompt replaces your draft — review and send.
Frequently asked questions
What is a Claude prompt enhancer?
A Claude prompt enhancer rewrites your plain-language input into a structured prompt — role, context, ordered instructions, constraints, and output format — before you send it to Claude. PromptAI does this in one click inside claude.ai via Chrome extension, and via a ⌘⇧P hotkey in Claude Code and Claude Desktop on macOS.
Why does prompt enhancement help Claude more than other models?
Claude follows output specifications unusually strictly. When a prompt defines exact sections, lengths, and formats, Claude delivers precisely that shape. Vague prompts therefore leave more quality on the table with Claude than with models that improvise structure on their own — enhancement closes that gap automatically.
Does PromptAI work inside claude.ai?
Yes. The Chrome extension adds an enhance button directly inside the claude.ai input box. It works in regular chats, inside Projects, and when requesting Artifacts. Your draft is restructured in place — no copy-paste round trip.
Does it work with Claude Projects and Artifacts?
Yes. For Artifacts, enhanced prompts act like mini design briefs — layout, data expectations, and constraints stated up front, which typically saves several revision rounds. For Projects, you can enhance the custom instructions once and every conversation in that Project inherits the structure.
What about Claude Code in the terminal?
That's the Mac desktop app's job. It adds a global ⌘⇧P hotkey that enhances highlighted text in any macOS app, including Claude Code in Warp, iTerm, Ghostty, or the VS Code terminal. There's a dedicated guide at promptai360.com/prompt-enhancer-for-claude-code.
Is there a free Claude prompt enhancer?
Yes. The live generator on this page runs free with no login. The Chrome extension is free to install and new accounts get a 5-day trial. Paid plans start at $7.99/month for unlimited enhancements across all surfaces.
Does PromptAI train on my Claude prompts?
No. Prompts are sent only to the enhancement model and never used for training or analytics, and never shared with third parties. Only billing metadata (enhancement counts) is kept.
Related reading
Try it on your next Claude prompt
Free to try, no account needed for the demo. The extension covers claude.ai; the Mac app covers Claude Code and Claude Desktop with a ⌘⇧P hotkey.