AI Prompt Generator Free
Free & open-source, browser-native prompt engineering wizard that helps users build high-quality prompts using rule-based frameworks (RTF, CO-STAR, TAG, APE). Runs 100% client-side, supports multiple AI model targets and optional client-side AI refinement via user-provided API keys.
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Quick Overview
Best for: Content & Marketing
What it does
Coding software for decision-makers comparing workflow fit and alternatives.
Best fit
Content & Marketing
Pricing snapshot
Free from Free
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AI Prompt Generator Free is a browser-native, rule-based prompt engineering wizard designed to help users build clear, high-performing prompts for large language models and generative engines. It emphasizes transparency and education by showing how each prompt field (Role, Task, Format and other framework components) affects output quality. The application runs entirely client-side in the browser, is open-source under MIT, stores data locally, and offers optional client-side AI refinement when users configure their own API keys.
The tool supports multiple frameworks (RTF, CO-STAR, TAG, APE), model-specific formatting (ChatGPT, Claude, Gemini, Midjourney), and multimodal prompt types (text, images, video, code). It targets developers, marketers, creators, and researchers who need reproducible, privacy-preserving prompt workflows and templates.
The best free AI prompt generator. Craft optimal text, image & code prompts for ChatGPT, Gemini, Claude & Midjourney using proven RTF and CO-STAR frameworks.
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Claim this listing for $29Key Features
Rule-based frameworks
Built-in frameworks including RTF (Role-Task-Format), CO-STAR, TAG, and APE to structure prompts and reduce ambiguity.
Model-specific formatting
Clean labeled sections and formatting tailored for target models (ChatGPT Markdown headers, Claude XML tags, Gemini bold labels, Midjourney parameters).
Live preview & before/after comparison
Live assembled prompt preview and side-by-side comparison of original vs. AI-refined prompts (when AI refinement is enabled).
Client-side operation & privacy
Runs 100% in the browser with zero telemetry and data stored in localStorage; users can wipe saved data and templates.
Optional AI refinement
Ability to configure an AI provider (OpenAI, Anthropic, Cohere, Google Gemini, local LLMs) and refine prompts client-side using the user's API key.
Multimodal support
Specialized wizards and templates for text, image, video, and coding prompts (e.g., Midjourney, Stable Diffusion, Sora, Runway, Pika Labs, GitHub Copilot).
Template library & saved prompts
Starter templates, save/load prompt history, and local storage of prompt templates and API configuration.
Open source
Project is open-source under the MIT license and linked to a GitHub repository.
Pricing
100% free and open-source; no sign-ups, subscriptions, or paywalls. Runs locally in the browser.
Free
Free- 100% client-side prompt generation
- Open-source (MIT)
- Live preview, templates, save prompts, local storage
- Optional configuration of third-party AI providers (requires user API key)
Use Cases
Writing & Content Creation
Craft structured prompts for blog posts, emails, stories, documentation, and marketing copy with role, context, tone, and format specifications.
Coding & Refactoring
Generate prompts to write, debug, refactor, review, or explain code, including language specs, framework versions, API schemas, and edge cases.
Image & Art Prompting
Create detailed image prompts for Midjourney, Stable Diffusion, and DALL·E with subject details, camera settings, lighting cues, style, and negative prompts.
Video & Motion Prompts
Outline camera movements, temporal pacing, and scene progression for generative video engines like Sora and Runway Gen-2.
Research & Data Analysis
Build prompts for papers, literature reviews, data analysis, SQL generation, and visualization with clear context and expected output formats.
Marketing & Ads
Generate prompts for ad copy, landing pages, social posts, and SEO-optimized content.
Integrations
OpenAI / ChatGPT
Configure OpenAI API keys and endpoints (GPT-4o, GPT-4, GPT-3.5) for optional client-side prompt refinement.
Anthropic Claude
Support for Claude models (Claude 3.5 Sonnet, Opus) as AI providers for optional refinement.
Google Gemini
Model target and provider option with notes about Gemini free tier and documentation links.
Cohere
Listed as a configurable AI provider (Command R+).
Local LLMs (Ollama, LM Studio, vLLM)
Support for local endpoints with example URLs (e.g., Ollama and OpenAI-compatible local endpoints) for client-side refinement.
Image & Video Generators
Templates and guidance for Midjourney, Stable Diffusion, DALL·E, Sora, Runway Gen-2, and Pika Labs for copy-pasting assembled prompts.
GitHub
Open-source repository and project hosting on GitHub.
Benefits
Limitations
Frequently Asked Questions
What is an AI prompt generator?
How do I write a good prompt for AI?
Are there free AI prompt tools?
Can I use a prompt generator for any AI model?
How does AI refinement work?
Getting Started
- 1 Step 1: Open the app and pick your goal category (Writing, Coding, Image, Video, Data, Research, Marketing, or Custom).
- 2 Step 2: Fill in RTF/CO-STAR/TAG/APE fields (Role, Context, Task, Format, Tone, Constraints, Examples) and watch the live preview assemble your prompt.
- 3 Step 3: Optionally configure an AI provider in Settings and provide an API key to enable client-side AI refinement; save prompts to local storage or copy the assembled prompt to your target model or generator.
Support
docs
SEO Guide & Documentation and in-app guidance for frameworks and model-specific formatting.
github
Source code and issue tracker available via the project's GitHub repository (link available on site).
contact
Contact page available at /contact for inquiries.
API
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