JSON Schema Validator & Generator
Use the formatter below to catch syntax errors (invalid commas, quotes, trailing commas) with precise line and column messages. Then scroll to the schema generator and infer a draft-07 JSON Schema from the same valid JSON. ideal for bootstrapping contracts, OpenAPI examples, and test fixtures.
Workflow
- Paste JSON into the formatter and click Validate or Format
- Fix any syntax issues until the document parses
- Copy the same JSON into the schema generator (or re-paste) and click Generate Schema
- Download
schema.jsonand wire it into your validator or CI
When to Add Runtime Validation
Inferring a schema is a starting point. For production, tighten types, required arrays, enums, and format keywords, then validate payloads in your server or tests with a JSON Schema implementation (Ajv, jsonschema, etc.).
JSON Formatter
Paste any JSON below. format it, validate syntax errors, or minify for production. Everything runs in your browser.
JSON Schema Generator
Generate a valid JSON Schema (draft-07) from any JSON object. Infers types, marks required fields, and handles nested structures.
Features on This Page
- Formatter: validate, beautify, minify, sort keys, share via URL hash
- Schema generator: draft-07 output with download
- Both tools are private and static-export friendly
Frequently Asked Questions
Does this validate against a schema I upload?
This page focuses on syntax validation and inferring a new schema from sample JSON. Validating instances against an existing schema belongs in your application or CI with a JSON Schema library.
Which JSON Schema version?
The generator produces draft-07 compatible schemas. widely supported by validators and OpenAPI tooling.
Is my JSON uploaded?
No. Both tools run entirely in your browser.
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