Plainify generates structured specification files for AI coding assistants like Claude Code, Cursor, v0, and Bolt. Powered by Claude's Haiku 3.5 and 4.5 models, it turns your input into detailed, AI-ready spec files. Use Relax Mode to describe your idea in one sentence and let AI handle the rest, or take full control with Custom Mode to build your spec section by section. Free to use. Built on an open-source spec format.