Just Prompts
AI prompt optimizer for better image generation
Just Prompts is a fast, free prompt optimizer that delivers on its promise. Ideal for beginners who need quick, structured prompt refinement without sign-ups. However, it lacks advanced features like history, save, or batch processing, making it less suitable for power users or teams. Compared to alternatives like PromptHero or Midjourney's describe feature, Just Prompts offers a more guided additive approach but zero integrations.
- Casual AI image generators
- Prompt engineering beginners
- Creators wanting faster image ideation
- Users of DALL·E, Midjourney, Stable Diffusion
- Users seeking an all-in-one image generation tool
- Those needing batch or programmatic prompt optimization
- Advanced prompt engineers with established workflows
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Skip Just Prompts if you need direct integration with image generators, batch prompt processing, or a sophisticated prompt management system.
Just Prompts is entirely free with no hidden charges, making it an excellent entry point for hobbyists and beginners. However, it lacks the depth of paid tools like PromptBase or Midjourney's subscription, which offer prompt marketplaces or direct generation.
In short
Just Prompts — AI prompt optimizer for better image generation. Best for Casual AI image generators, Prompt engineering beginners, Creators wanting faster image ideation. Free to use.
Viability Score
How likely is Just Prompts to still be operational in 12 months? Based on 4 signals — momentum (how recently it shipped), wrapper dependency, revenue model, and web presence.
Last calculated: July 2026
How we score →Key Features
- Two-step guided prompt refinement
- Additive prompting methodology
- Instant prompt generation in seconds
- Copy-to-clipboard output
- No account or signup required
- No complex settings or sliders
- Web-based (no install)
- Lightweight and fast
About Just Prompts
Just Prompts is a minimalist web tool that helps users improve their image generation prompts through a guided "additive prompting" technique. Instead of starting from scratch, you answer two core questions—what is your subject and how do you want the image to look?—and the tool iteratively enhances your input to produce a more detailed, higher-quality prompt in seconds. The tool is designed for anyone who uses AI image generators (like DALL·E, Midjourney, Stable Diffusion) but struggles to craft effective prompts. It walks you through a structured process that adds layers of specificity without requiring deep prompt engineering knowledge. What sets Just Prompts apart is its simplicity and focus: no sign-up walls, no complex settings—just a clean interface that transforms basic ideas into production-ready prompts. Created by @nickfloats and @SanxRoz, it emphasizes speed and accessibility for casual creators and power users alike. At its core, Just Prompts is not a generator itself but a prompt optimizer. It works by asking targeted questions and then applying best-practice structures (style, lighting, composition, mood) to your original input. The result is a fully formed prompt you can copy and paste into your preferred AI image tool.
Behind the Verdict
Just Prompts is a refreshingly simple tool in a space often cluttered with complex software. Its core strength lies in the additive prompting method: instead of overwhelming you with sliders and parameters, it asks just two questions (subject and style) and builds a detailed prompt layer by layer. The result is a prompt that often outperforms what you'd write yourself if you're new to prompt engineering. The lack of sign-up is a huge plus — you open the page and start refining immediately. The copy-to-clipboard workflow is seamless. However, there are clear trade-offs. There's no history, no saved prompts, no batch processing, and no direct integration with any image generator. You're copying and pasting manually. For advanced prompt engineers who already have their workflows, Just Prompts may feel too basic. The tool also doesn't support multimodal inputs (images as reference) or negative prompts. Where it fits: casually generating images for social media, blogs, or personal projects without overthinking. Where it doesn't: production pipelines requiring automation, team collaboration, or robust prompt management. Overall, Just Prompts is a perfect entry-level companion for AI art newcomers, but power users should look for dedicated tools with more depth.
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Real-world workflow fit
Concrete scenarios for the personas Just Prompts actually fits — and what changes day-one when you adopt it.
You have a rough idea of an image — 'a futuristic city at night' — but don't know how to prompt it well.
Outcome: You open Just Prompts, enter 'futuristic city' as subject and 'neon-lit cyberpunk' as style. In seconds, you get a detailed prompt with lighting, mood, and composition hints, which you copy and paste into Midjourney to generate a stunning visual.
You need a product shot with specific lighting and mood but have no photography background.
Outcome: Using Just Prompts, you input 'coffee mug on a wooden table' and select 'warm, soft lighting with rustic feel'. The output prompt includes reflections, shadows, and texture details, leading to better AI-generated images for the blog.
Use Cases
- Refine a vague concept like 'a cat' into 'a fluffy orange tabby cat lounging on a velvet chaise in golden hour light'
- Generate a detailed prompt for a fantasy landscape artwork in seconds
- Quickly create a prompt for a product photography scene with controlled lighting and mood
- Improve prompts for character designs by specifying style, expression, and background
- Iterate on an existing prompt by answering additional questions to add depth
Models Under the Hood
as of 2026-07-17
Limitations
- Just Prompts is a simple web app with no official API or rate limits documented, but since it runs client-side with no account system, usage is effectively uncapped per session.
- However, it offers no integration with specific image generators—you must copy the output manually.
- There is also no history or saved prompts feature.
as of 2026-07-03
Where the pricing makes sense
The company stage and team size where Just Prompts's pricing actually pencils out — and where peers do it cheaper.
Just Prompts is entirely free with no hidden charges, making it an excellent entry point for hobbyists and beginners. However, it lacks the depth of paid tools like PromptBase or Midjourney's subscription, which offer prompt marketplaces or direct generation.
Setup time & first value
How long it actually takes to get something useful out of Just Prompts — broken out by persona, not the marketing-page minute.
As a zero-sign-up web app, first value is immediate: open the URL and start refining prompts within seconds. No installation, configuration, or learning curve.
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