Free JSON Schema Generator
Generate JSON Schema from your JSON data automatically. Free, fast, and works entirely in your browser with no sign-up required.
JSON Schema Generator
Generate JSON Schema with format detection, constraints, and support for multiple draft versions.
Generation OptionsShow
JSON Input
Generated Schema12 props, depth 2
{
"$schema": "http://json-schema.org/draft-07/schema#",
"type": "object",
"properties": {
"id": {
"type": "string",
"format": "uuid",
"minLength": 1,
"maxLength": 255,
"description": "Id"
},
"name": {
"type": "string",
"minLength": 1,
"maxLength": 255,
"description": "Name"
},
"email": {
"type": "string",
"format": "email",
"minLength": 1,
"maxLength": 255,
"description": "Email"
},
"age": {
"type": "integer",
"minimum": 0,
"maximum": 1000000,
"description": "Age"
},
"isActive": {
"type": "boolean",
"description": "Is active"
},
"website": {
"type": "string",
"format": "uri",
"minLength": 1,
"maxLength": 255,
"description": "Website"
},
"createdAt": {
"type": "string",
"format": "date-time",
"minLength": 1,
"maxLength": 255,
"description": "Created at"
},
"tags": {
"type": "array",
"items": {
"type": "string",
"format": "hostname",
"minLength": 1,
"maxLength": 255,
"description": "Item0"
},
"minItems": 1,
"maxItems": 100,
"uniqueItems": true,
"description": "Tags"
},
"address": {
"type": "object",
"properties": {
"street": {
"type": "string",
"minLength": 1,
"maxLength": 255,
"description": "Street"
},
"city": {
"type": "string",
"minLength": 1,
"maxLength": 255,
"description": "City"
},
"zipCode": {
"type": "string",
"format": "hostname",
"minLength": 1,
"maxLength": 255,
"description": "Zip code"
}
},
"additionalProperties": false,
"required": [
"street",
"city",
"zipCode"
],
"description": "Address"
}
},
"additionalProperties": false,
"required": [
"id",
"name",
"email",
"age",
"isActive",
"website",
"createdAt",
"tags",
"address"
]
}Frequently Asked Questions
What is the JSON Schema Generator?
The JSON Schema Generator is a free online tool that automatically creates JSON Schema definitions from sample JSON data for API validation and documentation.
Is the JSON Schema Generator free?
Yes, it is completely free with no registration required. All schema generation happens client-side in your browser.
Does it store my JSON data?
No, all processing happens locally in your browser. Your JSON data is never sent to any server.
Does the JSON Schema Generator work on mobile devices?
Yes, the JSON Schema Generator is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.
Do I need to create an account to use this tool?
No account or registration is needed. Simply open the JSON Schema Generator in your browser and start using it immediately. There are no sign-up walls or usage restrictions.
What programming languages or formats does this support?
The JSON Schema Generator supports a wide range of popular formats and languages. Check the tool interface for the full list of supported options.
How do I use the JSON Schema Generator?
Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.
Which browsers are supported?
The JSON Schema Generator works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.
Related Tools
Free API Tester Online
Test REST APIs with GET, POST, PUT, DELETE requests. Free, fast, and works entirely in your browser with no sign-up required.
Free cURL to Code Converter
Convert cURL commands to code in JavaScript, Python, PHP. Free, fast, and works entirely in your browser with no sign-up required.
Free HTTP Headers Parser
Parse and analyze HTTP headers from requests and responses. Free, fast, and works entirely in your browser with no sign-up required.
Free Git Command Generator
Generate common Git commands with a visual interface. Free, fast, and works entirely in your browser with no sign-up required.
About Free JSON Schema Generator
Free JSON Schema Generator is a free, browser-based tool in our Developer Tools collection. Everything runs locally on your device — no uploads, no sign-up, and your data stays private.