The PromptPerfect successor. Per-platform AI prompts that actually work.
Free use needs a confirmed email. Enter it once, open the link we send, and you get 5 rewrites a day — no account, no password, no card.
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Enter your address and we'll send you a link. Open it and your rewrite runs automatically. 5 free rewrites a day, no account and no card.
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Your rewritten prompt appears here. Pick a starting point above or paste your own.
5 free rewrites a day. Confirm your email to start — no account, no password, no card. Or get it inside ChatGPT and Claude →
Paste what you would normally type. We restructure it into an AI-optimised prompt, tailored to Claude, ChatGPT, Gemini or Grok, because each one reads prompts differently.
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+30%
Anthropic reports its prompt improver lifted accuracy by 30% on a multilabel classification eval. Structure alone did that.
Source: Anthropic ↗Now built in
Structured step-by-step prompting mattered so much on 2022-era models, more than tripling maths accuracy in the Chain-of-Thought paper, that the labs trained it into the models themselves. Today's models reason by default, so the leverage moved. It now sits in whether your prompt states the goal, the constraints and what finished looks like.
Source: Wei et al., 2022 ↗We cite real published results and will not promise your prompts improve by a fixed percentage. Structure reliably helps; how much depends on your task and your model.
The free Chrome extension puts a Rewrite button straight into ChatGPT, Claude, Gemini and Grok, so a messy prompt becomes a proper one without leaving the tab. Same rewrites, same free allowance, same account.
Works in any Chromium browser: Chrome, Edge, Brave, Arc, Opera. Your prompt is sent to proper-prompt.com to be rewritten and is not stored.
New platforms, new languages, and what we ship next. No more than one email a month.
No. There is no account, no password and no card. Free use does need a working email address: you enter it once, open the link we send, and you get 5 rewrites a day per device. We use the address only for occasional product updates. Pro adds unlimited use and history.
Free-tier prompts are processed and discarded. Pro prompt history is opt-in and deletable any time.
Claude gets XML-tagged sections, which is Anthropic's documented best practice. ChatGPT gets a literal strict schema with capitalised headers. Gemini gets numbered steps plus an explicit output-format block. Grok gets a stated role, markdown sections and an explicit line on whether to search for live information. Same intent, four genuinely different rewrites.
Yes. Pick your language from the globe in the top bar and the polished prompt comes back in that language, section headers included. Code, file paths and XML tags stay as they are. It is included on the free tier too.
PromptPerfect shuts down on 1 September 2026. ProperPrompt is built as its cross-model successor: newer models, per-platform tailoring, simpler pricing. The migration guide walks through moving your prompts over.
Yes — ProperPrompt is on the Chrome Web Store, free, and works in Chrome, Edge, Brave, Arc and Opera. It adds a Rewrite button inside ChatGPT, Claude, Gemini and Grok, and shares your free allowance with the website rather than giving you a second one.
Frontier models from Anthropic — currently every rewrite, free and Pro, runs on Claude — behind a prompt-engineering template refined on real production prompts. If free-tier traffic is ever routed to another provider (such as Moonshot), the privacy policy names it. The template is the part that matters.
Install ProperPrompt as an app.