FREE AI TOOLS FOR BUILDERS
Free AI tools for people who want to build.
Create an agent-ready PRD, improve your prompts, find useful free AI APIs, and decide where an AI-built product needs more care.
FREE TOOLS
PRD Generator
Free tool. Answer five focused questions and get one implementation-ready PRD with scope, acceptance criteria, edge cases, and a build plan.
AI Prompt Optimizer
Free tool. Paste a prompt and get one sharper version with a clear task, useful context, and an explicit output.
System Prompt Creator
Create a reusable system prompt with a clear role, goal, constraints, output format, and decision rules.
Can I VibeCode It?
Free tool. Search a product category and get a practical read on whether an AI-built replacement is realistic today, plus the parts that still need care.
FREE AI API
Free tool. Find genuinely useful free AI APIs and local runtimes, then filter by signup, context window, or what you want to build.
FIELD NOTES
Free guides for getting more from AI tools.
A Simple Prompting Guide: How to Get Better Results From AI
A practical prompting guide with before-and-after examples that helps you get clearer, more useful results from AI.
Can I Vibe Notion?
Notion describes itself as an AI workspace with features for capturing information, finding answers, and automating work.
How to Write an Agent-Ready PRD
Learn how to write a clear PRD that helps an AI coding agent build the right product, with scope, workflows, constraints, and acceptance criteria.