Data & JSON tools

JSON to JSON Schema converter

Paste sample JSON and automatically generate JSON Schema with nested objects and arrays. All processing runs locally in your browser for API design and validation.

Title Forbid additional properties Indent

JSON input

Note: the schema is inferred from the sample JSON. Empty arrays produce empty items ({}), so you may want to refine constraints manually.

JSON Schema output

How to Use

1. Input JSON: Paste your sample JSON data into the input field on the left. 2. Configure: Set the Schema title, toggle 'Forbid additional properties', and choose indentation level. 3. Auto-Generate: The tool automatically infers types and structure to generate a JSON Schema in real-time. 4. Copy Result: Click 'Copy Schema' to save the generated schema text to your clipboard.

Key Features

Local Privacy: All processing happens in your browser. Your JSON data is never sent to our servers.

Smart Inference: Supports objects, arrays, and primitive types. Mixed-type arrays will automatically use 'anyOf' constructs.

Standard Ready: Generates schemas compatible with Draft 2020-12, ready for use in validation frameworks or API documentation.

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