How do I build a better Midjourney prompt for free?

Open Prompt Lab and type your basic idea. In Beginner mode, click Magic Clean to structure it, or Expand to make it more detailed. In Pro mode, add style transforms like Cinematic, Fantasy, or Cyber, set parameters like Aspect Ratio and Stylize, and build a Negative prompt to exclude unwanted elements.

What is Beginner vs Pro mode in Prompt Lab?

Beginner mode gives you simple one-click transforms: Magic Clean (structure your idea), Make it Better (expand), Creative Style, Fix Grammar, and presets like Quick, Balanced, and Max detail. Pro mode unlocks 15+ transforms including Humanize, Punchy, Logic, Structure, Vars, Negative, and style chips like Cyber, Fantasy, Retro, Studio, and Abstract.

What is a Negative Prompt and how do I use it?

A negative prompt tells the AI what NOT to include in the output — like 'blurry, low quality, extra fingers, watermark'. In Prompt Lab, click the Negative transform button in Pro mode to build a negative prompt that eliminates common artifacts and unwanted elements from your AI-generated images.

Can I export my prompts?

Yes. Prompt Lab lets you export your prompt workflow as a JSON file (for integration with other tools) or a TXT file (for easy sharing and copy-pasting). Prompt history is also saved for reference.

Midjourney · ChatGPT · Stable Diffusion · RunwayML · Beginner + Pro Modes

Prompt Lab

The ultimate AI prompt engineering workspace. Build perfect prompts for Midjourney, ChatGPT, Stable Diffusion, DALL-E, and RunwayML. Beginner and Pro modes, Magic Clean, Negative prompts, style transforms, and parameter controls. Free.

Open Prompt Lab Free

Beginner + Pro Modes

Image · Video · Text

Midjourney · ChatGPT · SD

No signup needed

Two Modes — One for Everyone

Switch seamlessly between Beginner and Pro mode depending on your skill level and needs.

🌱 Beginner Mode

No technical knowledge needed. Transform your simple idea into a structured, detailed AI prompt with one click.

✨ Magic Clean — structure your vague idea

🚀 Make it Better — expand and enrich

🎨 Creative Style — add artistic direction

📝 Fix Grammar — clean up language

Quick · Balanced · Max detail presets

⚡ Pro Mode

Full control for experienced prompt engineers. Fine-tune every aspect of your prompt with 15+ transforms and parameter controls.

15+ prompt transforms (Humanize, Logic, Vars...)

Style chips — Cyber, Fantasy, Studio, Retro, Abstract

Negative prompt builder

Parameters — Aspect Ratio, Chaos, Seed, Stylize

Magic In & Magic Out AI generation

Prompt history + Export JSON / TXT

3 Generation Modes

Switch between Image, Video, and Text prompt formats — each optimized for different AI tools.

🖼️

Image

Midjourney, DALL-E, Stable Diffusion. Parameters: Aspect Ratio, Stylize, Chaos, Seed.

🎬

Video

RunwayML and video AI tools. Parameters: Motion Scale, Aspect Ratio, FPS, Chaos.

💬

Text

ChatGPT, GPT-4, Claude, Gemini. Structure, tone, and context-aware prompt building.

15+ Pro Prompt Transforms

One-click transforms to reshape your prompt in any direction.

✨ Clean

📝 Grammar

🧠 Humanize

🚀 Expand

🎨 Creative

💥 Punchy

📐 Layout

🧩 Logic

🔒 Strict

🔤 Vars

✂️ Shorten

🔢 Simple

# Tags

😀 Emoji

🎭 Tone

🚫 Negative

🌸 Cyber

🔮 Fantasy

📷 Studio

🎞️ Retro

🌀 Abstract

Works with All Major AI Tools

Export your engineered prompts directly into any AI generation platform.

🎨 Midjourney

🖼️ DALL-E 3

🌌 Stable Diffusion

💬 ChatGPT

🤖 GPT-4

🎬 RunwayML

💎 Claude

✨ Gemini

More Features

Everything you need in a professional prompt engineering workspace.

Negative Prompt Builder

Build detailed negative prompts to eliminate artifacts, extra fingers, watermarks, low quality outputs, and unwanted elements from your AI-generated images.

Generation Parameters

Fine-tune Aspect Ratio, Chaos (variation level), Seed (reproducibility), Stylize (artistic strength), Motion Scale, and FPS for Video mode.

Magic In & Magic Out

In Pro mode, Magic In AI-generates an optimized input prompt from your rough idea. Magic Out transforms your current prompt into a high-fidelity output version.

Prompt History

Every prompt you work on is saved to history. Go back to any previous version, compare results, and never lose a great prompt you accidentally overwrote.

Export JSON or TXT

Export your complete prompt workflow — including parameters, negative prompts, and transforms — as a JSON file for tool integration or TXT for easy sharing.

Style Library

One-click style chips add instant artistic direction — Cinematic, Photorealistic, Anime, Fantasy, Cyber, Studio, Retro, Abstract — no need to know the right terminology.

How to Engineer Better AI Prompts

From rough idea to high-fidelity AI output.

Choose Your Mode & Generation Type

Open Prompt Lab and select Beginner or Pro mode. Then choose your generation type — Image (Midjourney/SD), Video (RunwayML), or Text (ChatGPT/GPT-4).

Type Your Rough Idea

Write your basic idea in plain language — no need to be technical. "a woman running through a forest at sunset" is a great starting point.

Apply Transforms & Parameters

In Beginner mode: click Magic Clean then Expand. In Pro mode: apply style transforms (Cinematic, Fantasy), set Aspect Ratio, and build a Negative prompt.

Copy & Paste into Your AI Tool

Copy your engineered prompt and paste it directly into Midjourney, ChatGPT, DALL-E, or any other AI tool. Export as JSON or TXT to save your workflow.

Frequently Asked Questions

Everything you need to know about Prompt Lab.

Open Prompt Lab, type your basic idea, and click Magic Clean to structure it. Then use Expand to add detail. In Pro mode, add style chips like Cinematic or Fantasy, set Aspect Ratio and Stylize parameters, and build a Negative prompt to exclude artifacts.

Beginner mode gives simple one-click transforms: Magic Clean, Make it Better, Creative Style, Fix Grammar, and Quick/Balanced/Max presets. Pro mode unlocks 15+ transforms, style chips (Cyber, Fantasy, Studio, Retro, Abstract), negative prompt builder, parameter controls, and prompt history.

Prompt Lab works with Midjourney, Stable Diffusion, DALL-E 3, ChatGPT, GPT-4, Claude, Gemini, RunwayML, and most other AI generation tools. Switch between Image, Video, and Text modes for the right prompt structure.

A negative prompt tells the AI what NOT to include — like "blurry, low quality, extra fingers, watermark". In Pro mode, click the Negative transform button to build a negative prompt that eliminates common artifacts from AI-generated images.

Yes. Export your complete prompt workflow as a JSON file (for tool integration) or TXT file (for easy sharing). Prompt history is also saved so you can revisit any previous version.

Yes. Prompt Lab is free with Tooljin's free plan which includes 20 tool opens per day and AI generation credits. No credit card or signup required.