Prompt engineering / runs offline
AI Prompt Optimizer & Generator
Turn a rough idea into a structured, high-scoring prompt for ChatGPT, Claude, Gemini or Midjourney. The optimizer runs entirely in your browser - no API key, no account and nothing sent to a server.
- Instant rewrite
- Quality score
- One-click copy
LOCAL PROCESSING
Start from a preset
Pick a workflow to load a prompt skeleton you can edit. Every preset already scores well.
1. Describe what you need
2. Copy your optimized prompt
0 charsSectioned prompt: role, task, context, requirements, length, format.
Describe what you need on the left and your optimized prompt appears here instantly.
Why your prompt scores 0/100
- Clarity & specificity0 / 25
Concrete nouns, numbers and a clear outcome beat adjectives like "good".
- Context & background0 / 20
Background and required ingredients stop the model from inventing facts.
- Role & audience0 / 15
A role sets vocabulary and depth; an audience sets reading level.
- Output specification0 / 20
Say exactly what the answer should look like and how long it should be.
- Constraints & quality bar0 / 20
Constraints, examples and success criteria are what make output reviewable.
How to improve it
- Describe what you want the AI to do in a sentence or two, then watch this score climb.
How the AI prompt optimizer works
A vague request makes a language model guess, and guessing is what produces generic answers. This optimizer applies the same rules professional prompt engineers use: it assigns a role, states the task, supplies context, fixes the output format and length, and adds constraints and success criteria. The result is a prompt that is reproducible instead of lucky.
What a well-built prompt contains
- Role - the expertise the model should adopt, which sets vocabulary and depth.
- Task - one clear instruction with a concrete outcome.
- Context - what already exists, who reads the answer, and what "good" means.
- Format and length - the exact shape of the reply, from JSON to a markdown article.
- Constraints - what to include, what to avoid, and how the answer will be judged.
Text prompts and image prompts
Text mode builds a sectioned prompt or a single-paragraph variant for ChatGPT, Claude, Gemini and similar assistants. Image mode builds a comma-separated prompt for Midjourney, DALL·E and Stable Diffusion, and adds the matching aspect-ratio flags and a negative prompt.
Private by design
Nothing is uploaded and no AI service is called while you type. The optimizer is a deterministic prompt-engineering engine that runs locally, so drafts of unpublished work stay on your device. When you are done, use JSON Formatter to tidy structured output, or the code compiler to test any snippet a prompt returns.
Frequently asked questions
Is the AI prompt optimizer free?
Yes. The optimizer is completely free with no signup, no usage limits and no API key. Every part of it runs in your browser.
Does it send my prompt to an AI service?
No. It is a deterministic, rule-based prompt-engineering engine, not a chatbot. Nothing is uploaded and no model is called while you type, so unpublished ideas stay on your device.
Which AI tools can I use the generated prompt with?
Any instruction-following model, including ChatGPT, Claude, Gemini, Copilot and DeepSeek. Image mode targets Midjourney, DALL·E and Stable Diffusion, and adds the matching aspect-ratio flags plus a negative prompt.
What makes a prompt optimized?
An optimized prompt states a role, a concrete task, the context, the audience, the exact output format and length, and the constraints. Those are the five areas the on-page score out of 100 measures.
Can I use the generated prompts commercially?
Yes. Prompts you build here are yours to use anywhere, including client work, paid products and internal documentation. There is no attribution requirement.
Does the tool work offline?
Yes. Once the page has loaded there are no background requests while you type, so it keeps working on a plane or with the network switched off.