Keep your best prompts as fill-in-the-blank templates and copy them anywhere in one click. For anyone who uses ChatGPT, Claude or Gemini most days and keeps rewriting the same request.

$6 once, yours to keep. Runs offline in your browser: no account, no AI key, no subscription.

Also part of the AI Builder Kit: Plainspoken, Blueprint, Skillsmith, Handoff and Promptbook together for $29 instead of $37.

Stop retyping your best prompts.

Everyone who uses AI a lot ends up with a handful of prompts that really work, and no good place to keep them. They live in old chats, a notes app, a document called "prompts FINAL 2".

Promptbook is that place, built around the one thing prompt collections get wrong: a saved prompt is a template, not a text. You need to change the topic, the tone, the pasted email, every single time.

What it does

• Fill-in-the-blank cards: {{topic}} becomes a box, {{tone: warm / neutral / firm}} becomes buttons, {{reader=my manager}} comes with a default
• Long fields (text, email, notes, document) get a big paste box automatically
• Live preview with your answers highlighted and empty blanks in red
• One-click copy; use counts and last-used dates
• Tags, favourites, search, sort by most used, recent or A to Z
• Add, edit, duplicate and delete your own prompts
• 24 starters written to avoid the usual AI failings: rewrite in my voice, reply to this email, summarise for a busy reader, check your own answer, second opinion on another AI, tough critique, spreadsheet formula, plain-English contract check, cover letter, mock interview, complaint letter, trip plan, and more
• Backup and restore, so your library moves with you

Who it's for

Anyone who uses ChatGPT, Claude or Gemini most days and keeps writing the same request from scratch.

What you get

• Promptbook (one .html file, runs in your browser, offline)
• A 2-page quick-start guide

Good to know

• Works with the AI you already use: ChatGPT, Claude, Gemini and the rest. There is no AI inside the app, so no API key, no credits and no monthly fee.
• One file. No install, no account, no subscription, no internet needed after download.
• Your data stays on your computer. Export a backup any time; import it on another machine.
• Built for a computer screen: Windows or Mac, in Chrome, Edge, Safari or Firefox.
• Instant download.

What's inside the download

• Promptbook.html
• Quick-Start-Guide.pdf