JSON Schema Generator — Draft-07 from JSON

Generate JSON Schema (Draft-07) from your JSON data automatically. Handles nested objects, arrays, and type inference. 100% client-side.

JSON Input0 chars

Output

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🛡️Zero server logs. Schema generation runs 100% inside your browser.

JSON Schema Generator — Draft-07 from JSON

Generate JSON Schema (Draft-07) from your JSON data automatically. Handles nested objects, arrays, and type inference. 100% client-side.

🔒 Client-side only⚡ Web Worker processing🌐 Works offline🛡️ Zero server logs

How to Use

Paste your JSON data into the input editor.
Click Generate to create a JSON Schema (Draft-07) with automatic type detection.
Copy the schema for use in validation, documentation, or API design.

Frequently Asked Questions

Questions about this tool? We've got answers.

What JSON Schema version does it generate?

The tool generates JSON Schema Draft-07. It infers types from your data (string, number, boolean, array, object) and sets required fields based on key presence.

Can it handle nested objects?

Yes. Nested objects and arrays are recursively processed to generate proper nested schema definitions with $ref references.

Is my data sent to a server?

No. All generation runs 100% inside your browser via a Web Worker.

Automated E2E Test Suite Logs

Our build systems validate edge-case processing under extreme conditions before each deployment.

Stability

100.0%

Passed

28/28

Env

V8-Sandbox

Engine: Vitest RunnerUpdated: 2026/6/11 00:18:12📦 Download Test Datasets

PASSgenerateJsonSchema should generate correct schema for benchmark data

PASSgenerateJsonSchema should include required array for root and nested objects

PASSgenerateJsonSchema should not include format fields

PASSgenerateJsonSchema should handle nested objects with required

PASSgenerateJsonSchema should handle simple object

PASSgenerateJsonSchema should handle empty object

PASSgenerateJsonSchema should handle flat array

PASSgenerateJsonSchema should throw on empty JSON input

PASSgenerateJsonSchema should throw on whitespace-only input

PASSgenerateJsonSchema should throw on invalid JSON

PASSgenerateJsonSchema should handle scalar number

PASSgenerateJsonSchema should handle scalar string

PASSgenerateJsonSchema should handle null value

PASSgenerateJsonSchema should handle boolean value

PASSJsonSchemaGeneratorTool renders Generate Schema button

PASSJsonSchemaGeneratorTool renders JSON Input and Schema Output labels

PASSJsonSchemaGeneratorTool shows Load URL button

PASSJsonSchemaGeneratorTool renders two textareas

PASSJsonSchemaGeneratorTool shows privacy strip

PASSJsonSchemaGeneratorTool shows error toast on Generate with empty input

PASSJsonSchemaGeneratorTool shows Clear toast on Clear All click

PASSJSON Schema Generator Worker Standard schema generation should generate schema from simple JSON

PASSJSON Schema Generator Worker Standard schema generation should generate schema from nested object

PASSJSON Schema Generator Worker Standard schema generation should propagate requestId correctly

PASSJSON Schema Generator Worker Boundary Conditions & Error Handling should return error for invalid JSON

PASSJSON Schema Generator Worker Boundary Conditions & Error Handling should return error for empty input

PASSJSON Schema Generator Worker Boundary Conditions & Error Handling should handle empty object gracefully

PASSJSON Schema Generator Worker Performance Benchmark should process large JSON within acceptable limits

⏱️ 0.18ms📦 1.5KB🎚️ Max Nesting: 3🌿 AST Nodes: 48🛡️ V8 Heap: Healthy

$ codecaven-validator --scope=tool● CLUSTER COMPLIANT

Tool Changelog & Updates

1.0.02026-06-10

Feature: Initial release