JSON Schema Generator
Convert any JSON to schema online using our free JSON Schema Generator. Supports nested JSON, arrays, and outputs Draft-07 format. Fast, secure, and browser-based.
About JSON Schema Generator
Generate JSON Schema from Any JSON Object Instantly
The JSON Schema Generator is a free online tool that converts any valid JSON input into a corresponding JSON Schema. Whether you're building APIs, validating data structures, or documenting backend responses, this tool makes it easy to define and share a formal schema.
What is JSON Schema?
JSON Schema is a powerful standard used to describe and validate the structure and data types of JSON objects. It ensures consistency, documentation, and better debugging across applications that consume or produce JSON data.
Key Features
- Instant Schema Generation: Paste your JSON, and the tool builds a schema in seconds.
- Supports Nested JSON: Works flawlessly with objects, arrays, and deeply nested structures.
- Schema v7 Format: Output follows the latest standards for broad compatibility.
- Copy & Download: Easily export the schema for use in your projects.
- Browser-Based: All processing is done on your device for privacy and speed.
How to Use the JSON Schema Generator
Step 1: Paste Your JSON
Insert your raw JSON into the editor box.
Step 2: Click “Generate Schema”
The tool will analyze the structure and generate a schema with appropriate type definitions.
Step 3: Copy or Download
You can copy the schema to clipboard or download it for use in validation libraries or documentation.
Common Use Cases
- Creating API documentation and validation rules
- Generating schemas for MongoDB, Firebase, or NoSQL databases
- Form-building tools and data structure enforcement
- Debugging backend responses with inconsistent data
Frequently Asked Questions
1. What does this tool do?
It converts a JSON object into a matching JSON Schema that defines the structure and types.
2. Which schema version does it use?
The tool uses JSON Schema Draft-07 standard for best compatibility.
3. Can I use it for nested or array-based JSON?
Yes, it works well with any level of nesting and includes array definitions too.
4. Is my data secure?
Absolutely. Everything is processed in your browser. No data is uploaded to any server.
5. Can I use the schema with code validators?
Yes, the output is compatible with most popular libraries like Ajv, Joi, and Swagger.
6. Does it handle edge cases like nulls or mixed types?
It infers based on sample values. For mixed types or nullable fields, manual adjustment may be required.
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