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Universal AI Prompt Generator
Generate engineer-grade prompts for ChatGPT, Midjourney, Sora, and Claude in seconds.
Universal Prompt Refiner
Refine your prompt for a specific AI in a few clicks.
Step 1 – What type of AI are you using?
Step 2 – Select the AI brand
Step 3 – Describe your idea
Settings
Optimized for Leading Models:
More AI Prompt Generator Tools
Alongside the main prompt generator, you’ll find a full set of specialized tools. Each one focuses on a specific use case so you can jump directly into AI prompt generation for writing, images, SEO, product copy, and more.
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Why This Is The Only AI Prompt Generator You Need
Welcome to Promptsera, the most advanced free AI prompt generator on the web. Unlike other tools that force you to sign up or pay for credits, Promptsera is 100% free and requires no login. We believe that professional prompt engineering should be accessible to everyone—from developers debugging Python code to artists creating cinematic masterpieces in Midjourney.
Whether you are struggling with generic ChatGPT outputs or trying to figure out the complex aspect ratios of Sora, our Universal Prompt Engine refines your rough ideas into machine-perfect instructions. Stop guessing. Start generating.
Optimized for Every AI Modality
Text & Code
Dominate LLMs like GPT-4o, Claude 3.5 Sonnet, and Gemini Advanced. Our tool injects 'Chain-of-Thought' logic, persona definitions, and context constraints to stop hallucinations and force high-quality text generation.
Image & Art
Master Midjourney v6, DALL-E 3, and Stable Diffusion XL. We automatically format style parameters (--s), aspect ratios (--ar 16:9), and negative prompts to ensure photorealistic, artifact-free images every time.
Video & Motion
Ready for the video revolution? Generate complex camera movement prompts for OpenAI Sora, Runway Gen-2, and Kling. Define pan, tilt, zoom, and lighting physics to control your AI scenes like a movie director.
How to Write the Perfect AI Prompt in 3 Steps
Prompt engineering is no longer a mystery. Follow this workflow to get the best results from Promptsera:
1. Select Your Model Type:
Choose between 'Text', 'Image', or 'Video'. This changes the underlying algorithm. For example, selecting 'Image' unlocks specific parameters for lighting and texture that text models don't understand.
2. Input Your Rough Idea:
You don't need to be technical. Just type 'a cat sitting on a wall.'
3. Apply Magic Settings:
Style: Choose 'Cyberpunk' or 'Minimalist' to instantly apply complex artistic modifiers.
Negative Prompting: Tell the AI what to avoid (e.g., 'bad hands,' 'blurry,' 'text').
Generate: Click the button. Our system restructures your sentence into a token-optimized format that the AI model prefers.
Advanced Logic: Negative Prompts & Aspect Ratios
A great prompt isn't just about what you want; it's about what you don't want. Promptsera is one of the few free prompt generators that includes a dedicated Negative Prompt Builder.
For Stable Diffusion & FLUX Users:
Negative prompts are essential for removing artifacts. Our tool automatically appends industry-standard negative terms to clean up your generations.
Aspect Ratio Calculator:
Don't do the math yourself. Select 'Story (9:16)' for TikTok/Reels or 'Cinema (21:9)' for wide-screen outputs. We format this correctly for every model, ensuring your Midjourney prompts render perfectly without cropping.
Frequently Asked Questions
A: Yes. Promptsera is a completely free AI tool. There are no hidden subscriptions, no credit systems, and no login required. You can generate unlimited prompts for as long as you like.
A: We support the widest range of models on the market. For text: GPT-4, Claude 3, Llama 3, Mistral, and Gemini. For images: Midjourney, DALL-E 3, Stable Diffusion, and FLUX. For video: Sora, Veo, and Runway.
A: When you select a persona (e.g., 'Python Expert'), we inject a system instruction at the start of your prompt. This tells the AI: "You are an expert senior Python developer." This simple addition drastically improves the accuracy of coding and technical answers.