Data tools

JSON Schema Validator & Generator

Validate JSON against JSON Schema, generate starter schemas from sample payloads, and inspect Ajv errors locally.

Schema workspace

Validate payloads and bootstrap schemas from samples.

Schema error

Validation result

Code generation from strings disallowed for this context

Features

Ajv Validation

Runs JSON Schema validation in the browser with detailed path-level errors.

Schema Generator

Creates a starter schema from representative JSON so you can refine constraints.

JSON and YAML Friendly

Pairs naturally with the JSON Parser and JSON Converter pages.

Required Fields

Generated object schemas include required keys from the sample payload.

Copy Results

Copy generated schemas and validation output for docs or tests.

Local Validation

Payloads and schemas stay in the browser.

Frequently Asked Questions

Ajv validates common JSON Schema usage locally. Strict mode is relaxed to keep exploratory schemas practical.

It is a strong starter schema inferred from one payload. Review business constraints such as formats, enums, ranges, and nullable fields before using it in production.

No. Validation and schema generation run in the browser.

A growing collection of fast, privacy-first developer utilities. All tools run in your browser — your data never leaves your device.

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