PrePrompt adds a Rewrite button to ChatGPT, Claude, Gemini and Perplexity. Free plan with 30 rewrites a month; paid plan prices revealed at launch.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
PrePrompt is a prompt-rewriting tool that adds a Rewrite button next to Send in ChatGPT, Claude, Gemini and Perplexity. A user types a rough request, clicks the button, and the text in the box is replaced with a more specific version before it reaches the model. The company says this removes the need to learn prompt engineering.
The site describes PrePrompt as a prompt-engineering engine behind three surfaces: a Chrome extension, a VS Code extension, and an MCP server for Cursor and Claude Code. At the time of writing, the Chrome extension is listed as launching soon, with a waitlist, and the VS Code extension is in private beta.
The extension acts only on click. It sends the text from the chat box to PrePrompt's rewriter and puts the result back in the same box, and users can undo any rewrite in one click. Clear prompts pass through untouched, and local checks for pass-through, clarification and secret scanning run without using credits.
To write a rewrite, PrePrompt makes one call to Anthropic's API, so Anthropic sees the prompt even on ChatGPT, Gemini and Perplexity. The site says it does not read other tabs, browsing history or conversation history, and analytics events exclude prompt text. A usage record of each rewrite is kept for the dashboard.
The core feature is the in-page Rewrite button, which expands short prompts by adding details such as audience, output format, stack or repro steps, according to the site's examples. Every plan includes a dashboard with usage history and per-site enable and disable controls, so users can turn the button off on sites where they do not want it.
Paid plans add larger credit allowances, and local checks never cost credits. Premium model access, which uses Sonnet for harder prompts, and top-up packs are marked coming soon. The same credits apply across Chrome, VS Code and MCP, which suits people who prompt in both a browser and an editor.
PrePrompt is a prompt-rewriting tool that adds a Rewrite button to ChatGPT, Claude, Gemini and Perplexity. It replaces a vague prompt with a more specific one before the user sends it. It also offers a VS Code extension and an MCP server for Cursor and Claude Code.
The Free plan costs $0 and includes 30 rewrites a month. Developer (500 credits a month) and Pro (1,500 credits a month) are paid plans, but their prices are listed as revealed at launch. Team pilots are $20 per seat per month with a 3-seat minimum.
Yes. The Free plan includes 30 rewrites a month on all four supported chat sites, a dashboard with usage history, per-site enable and disable, and community support. The site says there is no card, no trial and no expiry.
It works on ChatGPT, Claude, Gemini and Perplexity. The support page states it only runs on these four sites. A VS Code extension is in private beta, and an MCP server covers Cursor and Claude Code.
Not at the time of writing. The site says the extension is launching soon on Chrome and invites visitors to join a waitlist to receive one email on launch day.
By default, the extension sends only the text typed into the chat box when the user clicks Rewrite. PrePrompt sends it to Anthropic's API to write the rewrite, so Anthropic sees the prompt. The site says it does not read other tabs, browsing history or conversation history.
A credit measures powered rewrites. A standard Haiku rewrite costs 1 credit, and a Sonnet rewrite, coming soon for Pro, will cost 5. Local checks such as pass-through, secret scan and clarification are free.
Support is by email at hello@preprompt.org. Best-effort first-reply targets are 1 business day for Pro and 2 for Developer, Free is best-effort, and security or privacy issues are acknowledged within 24 hours. The company says these are not a contractual SLA.