Assigns an expert persona to the AI — more specialized and coherent responses every time.
02
Context Framing
Wraps your request with background and intent so the AI understands the real goal.
03
Output Specification
Tells the AI exactly what format, length and structure to use in the response.
04
Chain of Thought
Instructs the AI to reason step by step — reduces errors on complex tasks significantly.
05
Visual Tags
For images and video: adds style, lighting, camera, quality and negative prompt modifiers.
06
Constraint Setting
Defines what the AI should avoid — prevents generic, off-topic or padded responses.
Recent history
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About
What is PromptCraft?
A free, instant AI prompt optimizer — no account, no setup, no cost.
The Problem
Most people get mediocre results from AI tools not because the AI is bad — but because their prompts are vague. A simple "explain photosynthesis" returns a generic answer. A well-structured prompt with role assignment, context, and output specification returns something genuinely useful.
Writing great prompts is a skill. PromptCraft makes it instant.
How It Works
PromptCraft is powered by Llama 3.3 70B, Meta's open-source large language model, running on Groq's ultra-fast inference hardware. When you submit a prompt, it is sent to the Groq API, rewritten by the model using professional prompt engineering techniques, and returned to you in 1–2 seconds.
There is no server between you and the AI. Your prompts go directly from your browser to Groq's API over encrypted HTTPS.
Techniques Applied
Role Prompting — assigns an expert persona to the AI
Context Framing — wraps your request with intent and background
Output Specification — defines format, length, and structure
Chain-of-Thought — instructs the AI to reason step by step
Visual Tag Injection — adds style, camera, and quality modifiers for image prompts
Scene Specification — adds cinematic detail for video generation prompts
Supported Types
Text — optimized for ChatGPT, Claude, Gemini, Perplexity, and similar models
Image — optimized for Midjourney, DALL·E 3, Stable Diffusion, and Flux
Video — optimized for Sora, Kling, Runway, and Pika
100% free. No account required. No data stored. Open in your browser and start optimizing immediately.
Legal
Privacy Policy
Last updated: April 2026 · PromptCraft
Overview
PromptCraft ("we", "our", "the app") is a free browser-based tool for optimizing AI prompts. We are committed to protecting your privacy. This policy explains what data is collected, how it is used, and your rights.
Data We Collect
PromptCraft collects minimal data to function:
Prompts you submit — sent to the Groq API for processing. We do not store these on any server of our own.
Local history — saved in your browser's localStorage. This data never leaves your device.
No personal data — we do not collect names, email addresses, IP addresses, or any personally identifiable information.
Third-Party Services
PromptCraft uses the following third-party services:
Groq API (groq.com) — processes your prompts using the Llama 3.3 70B language model. Groq's privacy policy applies to data sent to their API. Groq states they do not use API inputs to train their models.
Google Fonts — loads the Inter and Lora typefaces. Google may collect anonymous usage data per their privacy policy.
Google AdSense — this site may display ads served by Google. Google uses cookies to serve ads based on your prior visits to this and other websites. You may opt out via Google's Ad Settings.
Cookies
PromptCraft itself does not set cookies. Third-party services (Google Fonts, Google AdSense) may set cookies as described in their respective privacy policies. You can control cookies through your browser settings.
localStorage
We use your browser's localStorage to save your prompt history locally. This data is stored only on your device, is never transmitted to our servers, and can be deleted at any time using the "Clear all" button in the History section or by clearing your browser's site data.
Children's Privacy
PromptCraft does not knowingly collect personal information from children under 13. The app does not require registration or submission of personal data to function.
Your Rights
You can clear all locally stored data at any time via the "Clear all" button
We may update this Privacy Policy from time to time. Changes will be reflected by the "Last updated" date at the top of this page.
Contact
For any questions about this privacy policy, contact us at galzoni923@gmail.com.
Contact
Say hello 👋
Built by an indie developer who loves making useful free tools.
About the developer
Hey! I'm the person behind PromptCraft. I'm a student and indie developer passionate about AI, technology, and building things that actually help people. PromptCraft started as a personal project and grew into a free tool used by people all over the web.
I build and maintain this entirely on my own — no team, no budget. If it's ever saved you time, a coffee means a lot. ☕
Get in touch
Have a suggestion, found a bug, or just want to say hi? Reach out directly: