Paste a rough AI prompt and get a structured one: Role, Goal, Context, Constraints, Output Format and Examples. Prompt Optimizer runs entirely in your browser (no account, no server), so your prompts stay on your computer.

What you get

Offline rewrite into six clear, editable sections

A quality score (out of 100) with specific fix tips

Prompt library: save, tag, search and favorite, with JSON export and import

9 templates with variables and a fill-in form: cold email, code review, blog post, summary, data analysis, debugging, meeting actions, product description, study plan

Output formats for Claude (XML tags), GPT, Gemini, plain text and JSON, with copy and download

Before-and-after diff, undo, redo and session history

Custom rules: your own role presets, keywords and defaults

10 color themes (5 light, 5 dark) and keyboard shortcuts

Optional AI pass using your own OpenAI or Anthropic API key

How it works

The rewrite is rule-based (it is not an AI model), so it is fast and works offline. It is heuristic and will sometimes put a sentence in the wrong section, which is why every section is editable and labelled with where it came from. The optional AI pass sends your prompt directly to the provider you choose, using your own key.

What you receive

A ZIP file. Unzip it and double-click index.html. No install and no build step. Works in current Chrome, Edge, Firefox and Safari.

License and terms

Single-user commercial license: use it for your own work and for client work, but please do not share or resell the files. Includes 12 months of updates. Founding price of $19 for the first 50 buyers (regular price $29). 14-day refund, no questions asked: message me through this page.

Try the free demo first, no sign-up: https://prompt-optimizer-3zc.pages.dev/demo/ (it has the core rewrite, 3 templates and a quality score; the library, all templates, every format and fix tips are in this paid version).