Free tools for vibe-coding an app

No account, no credits: small utilities for your daily vibe-coding workflow, whether you build on Lovable, Base44, Bolt or Chattee. Spec it, price it, sketch it — then take the result to your builder.

What is vibe coding?

Plan your app

AI PRD Generator

Turn an app idea into a requirements document your team, your agency or an AI builder can act on.

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App Development Cost Calculator

Describe the app, get a feature breakdown and honest cost ranges for the ways you could get it built.

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User Story Generator

Describe a feature or epic. Get the stories, the acceptance criteria and the edge cases your team would otherwise find in testing.

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Internal Tool ROI Calculator

What the manual process costs per year, and how fast an agency build or a Chattee app pays for itself.

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Startup Idea Validator

An honest read on your idea: scores, Lean Canvas, MVP scope and risks — from an advisor who has seen a lot of ideas.

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Design & data

Database Schema Generator

From a description to a normalised schema: entities, relationships, ER diagram, SQL and Prisma.

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Spreadsheet to App Analyzer

Drop the Excel or CSV file your team keeps breaking. Get the data model, screens and roles of the app that should replace it.

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AI Mockup Generator

Describe a screen. Get a clickable-looking wireframe in seconds — desktop or mobile, in the style you pick.

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Prompting

App Builder Prompt Generator

Type the idea the way you would say it. Get the brief an AI builder needs to get it right the first time.

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App Name Generator

Describe the app, pick a style, get twenty names with taglines. Then check the domain and build it.

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From your website

Website to App Analyzer

Enter a business website. Get the three apps it should have, with features, users and a build prompt for each.

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Website to App (PWA) Converter

Make your website installable: manifest, service worker and the snippet that wires them — generated from what your site already declares.

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For marketers

Lead Magnet Idea Generator

Describe what you sell and to whom. Get ten interactive tool ideas that capture leads because visitors actually use them.

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Ready to turn a plan into a working app?

Describe what you need and Chattee builds the whole thing — database, accounts, logic, deployment. Planning is free.

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