Describe
Start with the outcome, audience, and context in your own words.
Optimized for the AI models you already use
ChatGPT
Claude
Gemini
Grok
DeepSeek
Midjourney
Runway
Cursor
One connected workflow
From rough idea to a prompt worth keeping
Build, test, refine, and save structured prompts without losing context between tools.
Your briefCreate a product launch plan for an AI research assistant.
Target modelCClaude
Generated prompt
Role: Senior go-to-market strategist
Goal: Build a focused 30-day launch plan
Format: Priorities, channels, messages, and metrics
Saved to your private library
Generate
Turn the brief into a structured prompt for the target model.
Refine
Improve clarity, constraints, format, and model fit without starting over.
Save
Keep the final version private, searchable, and ready to reuse.
Everything your prompt needs, in one place
Four focused tools cover the complete prompt lifecycle, from first draft to reusable asset.
Prompt Generator
Convert a natural-language brief into a structured prompt with role, context, constraints, and output format.
Brief to model-ready prompt
Prompt Optimizer
Improve an existing prompt for clarity, specificity, structure, and target-model fit.
Refine without rebuilding
Prompt Assistant
Run a prompt inside the workspace, inspect the result, and continue iterating.
Test before you reuse
Prompt Library
Save, search, edit, favorite, and restore your private prompt history.
Your prompts stay organized
Built for the work you already do
Choose the task, target model, language, tone, and structure. Prompt Builder handles the prompt architecture.
Start freeMarketing and SEO
Campaign plans, landing pages, keyword briefs, and conversion copy.
Product and research
Discovery plans, requirement analysis, synthesis, and decision support.
Code and data
Implementation briefs, debugging instructions, SQL, and technical reviews.
Support and content
Response systems, knowledge content, social posts, and reusable workflows.
Pick a plan, upgrade anytime
Start with Starter, then upgrade when you need more prompts.
Starter
For validating an AI product before you need high volume.
$10per month
500 credits each month
Recurring subscription billed through Creem
- Generate, optimize, and test prompts
- Private searchable prompt library
- Automatic credit refund on AI failure
Pro
For teams and products that need more generation capacity.
$20per month
1,500 credits each month
Recurring subscription billed through Creem
- Generate, optimize, and test prompts
- Private searchable prompt library
- Automatic credit refund on AI failure
Credits Pack
One-time credits you can stack on top of any plan.
$5one time
200 credits in one payment
One-time checkout, credits added instantly
- Generate, optimize, and test prompts
- Private searchable prompt library
- Automatic credit refund on AI failure
Questions, answered clearly
The essentials about models, credits, privacy, and the current product scope.
What is Prompt Builder?
Prompt Builder is a workspace for generating, optimizing, testing, saving, and reusing structured AI prompts.
Which target models are supported?
You can shape prompts for ChatGPT, Claude, Gemini, Grok, DeepSeek, image and video models, and coding assistants.
Can I test prompts inside the product?
Yes. Prompt Assistant currently supports focused single-run tests, so you can inspect an output before saving the final prompt.
How do credits work?
Prompt generation, optimization, and Assistant tests each use 1 credit. Saving, copying, favoriting, and browsing history are free.
Are my saved prompts private?
Yes. Your prompt history and library are private to your account and cannot be accessed by other users.
Turn your next idea into a prompt worth keeping
Start with 10 registration credits and build your first reusable prompt workflow.
Open Prompt Builder