(TO THE GOD OF ABRAHAM, ISAAC AND JACOB. I DEDICATE THIS WORK TO YOU MAY YOU BLESS IT AND MAY IT BLESS THOSE YOU USE IT, MORESO MAY THEY KNOW YOU BY NAME, REPENT AND BE LED TO YOUR WILL AND KINGDOM.) Our Father who is in the heavens, let Your Name be set-apart,let Your reign come, let Your desire be done on earth as it is in heaven. Give us today our daily bread. And forgive us our debts, as we for- give our debtors. And do not lead us into trial, but deliver us from the wicked one because Yours is the reign and the power and the esteem, forever. Amen.
JSON to TypeScript Converter - Generate Interfaces Free - devformat.tools

JSON to TypeScript

Runs in your browser
Input
Output
Ready — zero server calls
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How to Use
  1. Paste a JSON object or array into the input field.
  2. Click Convert to generate TypeScript interfaces.
  3. Copy the generated interfaces into your TypeScript project.

Convert JSON to TypeScript

Paste any JSON and get TypeScript interfaces instantly. The converter infers types from values, handles nested objects, arrays of objects, optional fields, and date strings. Perfect for quickly creating type definitions from API responses.

How It Works

The tool analyzes your JSON structure, creates named interfaces for each object type, singularizes array names for child interfaces, and detects common patterns like ISO dates. Nested objects become separate interfaces, and arrays of objects are merged to capture all possible fields.