The free AI prompt generator that builds prompts for you
Pick what you need, answer a few quick questions, get a high-scoring prompt for text or images, ready for ChatGPT, Claude, Gemini, Midjourney and more. Free, no signup required.
Step 1 of 4
What do you need?
Pick the kind of thing you want the AI to help with.
Tested prompts, ready to use
Every prompt scored and verified. Copy, customise, and go.
Social Media Content Calendar Generator
Creates a structured 30-day social media content calendar with post ideas, hashtags, and optimal posting times for any brand.
Email Subject Line A/B Test Generator
Generates 10 pairs of A/B test email subject lines optimised for open rates, with reasoning for each variation.
SEO Blog Post Brief Creator
Produces a comprehensive SEO-optimised blog post brief including target keywords, headings, word count, and internal linking strategy.
Facebook Ad Copy Variations
Generates multiple Facebook ad copy variations using proven frameworks like PAS, AIDA, and BAB for split testing.
Product Launch Announcement Suite
Creates a complete set of launch assets: press release, social posts, email, and landing page copy for a new product.
Brand Voice & Tone Guide Builder
Develops a comprehensive brand voice guide with personality traits, do/don't examples, and tone variations for different channels.
Competitor Analysis Report Template
Structures a competitive analysis comparing features, pricing, positioning, and market gaps across 3-5 competitors.
Influencer Outreach Email Sequence
Crafts a 3-email outreach sequence for influencer partnerships with personalisation slots and follow-up timing.
What makes a good AI prompt?
A good AI prompt is the difference between an answer that disappoints and one you can ship. Most people write prompts that are too vague, too short, or missing the context the model needs to do the job properly, and then blame the model when the output is generic.
Promptrace solves this by building the prompt for you. It is also a prompt optimizer: every prompt the builder produces is scored across seven research-backed dimensions (role, clarity, specificity, context, format, constraints, and examples) so you can see exactly why it works. The same framework is what powers the standalone prompt scorer at /scorer, which lets you score prompts you already wrote.
Browse the prompt library for hundreds of tested AI prompt examples, try the dedicated AI image prompt generator for Midjourney, Flux, GPT Image and more, or read the prompt engineering guide for a deeper walk-through of every dimension.
Frequently asked questions
What is Promptrace?
Promptrace is a free AI prompt builder for ChatGPT, Claude, and Gemini. Pick what you need, answer three quick questions, and Promptrace assembles a high-scoring prompt for you. No signup, no usage limits, no prompt-engineering knowledge required.
How does the prompt generator work?
Promptrace is a guided wizard. Step 1: pick the kind of thing you need (write, image, analyse, advise, code, or other). For text branches you then pick a subtype (email, blog post, etc.), add details like audience and tone, and get your assembled prompt with a transparent seven-dimension score plus one-click 'Run in ChatGPT / Claude / Gemini' buttons. For the image branch you go straight to details: pick a model (Midjourney, Nano Banana, GPT Image, Ideogram, Flux, or generic), a visual style, mood, camera, lighting and more, and get a prompt in the right dialect for your chosen model with a deep-link to open it there.
Is this a prompt optimizer or a prompt generator?
Both. The homepage builder generates a high-scoring prompt from your guided choices; that's the generator. The same prompt is then scored across seven dimensions and you can tweak it with AI; that's the optimizer. If you already have a prompt you wrote yourself, you can paste it into the dedicated scorer at /scorer instead.
Is Promptrace really free?
Yes. Generating prompts, scoring prompts, browsing the library, and the AI tweak feature are all free forever, with no signup required and no daily limit. The site is funded entirely by display ads.
Which AI models does Promptrace support?
The generated prompts are designed to work with any large language model: ChatGPT (GPT-4, GPT-5), Claude (Sonnet, Opus, Haiku), Google Gemini, Llama, Mistral, and others. The 'Run in ChatGPT' button opens ChatGPT with your prompt pre-filled. The Claude and Gemini buttons copy the prompt to your clipboard and open the chat for you to paste, because Anthropic and Google don't currently support URL-based prompt prefill.
Why does the score matter?
Promptrace's scorer evaluates prompts across seven research-backed dimensions: role definition, task clarity, specificity, context, output format, constraints, and examples. Each dimension correlates with the quality of the AI's response. A high-scoring prompt produces consistently better results than a vague one, and the score is computed transparently, so you can see exactly what makes a good prompt good.