BuilderTools.dev

Essential tools for everyone building digital products

Whether you're a seasoned developer, building apps with AI assistance, or just getting started with no-code tools - you need quick, reliable utilities that just work. No setup, no learning curve, no hassle.

Perfect for AI builders: Converting data formats, calculating costs, fixing JSON errors, and handling the technical bits while you focus on prompting and creating.

Explore All ToolsTry Data Converter
70M+

Builders Worldwide

Developers + AI builders

5

Tools Available

More launching weekly

0sec

Setup Time

Just open and use

Built for Modern Builders

Professional Developers

Speed up daily tasks and eliminate repetitive calculations

AI-Powered Builders

Essential tools for those building apps with ChatGPT, Claude, and other AI

Vibe Coders

No-code/low-code enthusiasts who need quick, reliable calculations

Available Now

Ready to use - no account, no setup, no learning curve

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URL Parameter to JSON Converter

Available

Extract URL parameters and convert them to clean JSON objects. Perfect for API testing, debugging, or feeding data to AI tools.

💡 Great for converting website URLs into data that AI can work with

Data Conversion

JSON Repair Tool

Available

Fix broken or malformed JSON from AI models, APIs, and data sources. Automatically repair syntax errors, missing quotes, and formatting issues.

💡 Perfect for cleaning up AI-generated JSON with syntax errors

Data Validation

Data Format Converter

Available

Convert between JSON, CSV, and XML formats instantly. Handle all combinations with smart data structure preservation and validation.

💡 Transform datasets between formats for AI training and automation workflows

Data Conversion

Token Counter & Cost Estimator

Available

Calculate token counts and estimate costs for OpenAI, Claude, Mistral, and other AI models. Know your API costs before making calls.

💡 Budget your AI API usage and compare costs across different models

AI Development

CSS Unit Calculator

Available

Convert between px, rem, em, vw, vh with live preview and responsive breakpoints. Perfect for AI-generated CSS and responsive design.

💡 Perfect when AI gives you CSS code but you need different units

Design & Styling

Coming Soon

Next wave of tools for AI builders and developers alike

API Cost Calculator

Soon

Compare pricing across cloud providers and estimate API usage costs before development

Budget for AWS, Google Cloud, or custom API integrations

Planning & Costs

Prompt Formatter & Debugger

Soon

Build, test, and version your prompt templates with syntax highlighting

Manage complex prompts and track what works across models

AI Development

Flexbox Properties Calculator

Soon

Generate CSS flexbox properties with visual preview and copy-paste code

Validate and adjust AI-generated flexbox layouts

Design & Styling

Why BuilderTools.dev Exists

The way people build software is changing. Whether you're writing code by hand, collaborating with AI, or using no-code platforms - you still need reliable tools that handle the technical details quickly and accurately.

Perfect for AI Builders

  • Convert data for AI prompts
  • Fix malformed AI outputs
  • Transform between data formats
  • Handle technical details while you create
  • No coding knowledge required

Built for Everyone

  • Professional developers
  • ChatGPT/Claude power users
  • No-code app builders
  • Technical project managers

Building the future of productivity tools. Have an idea for a tool that would save you time while building with AI or code? We're always looking for the next problem to solve.