JSON Validator

Strictly validate JSON with precise line and column error messages. Optionally validate data against a JSON Schema. Free online JSON validator.

Validate against JSON Schema

JSON data

Valid JSON syntax

Validate JSON and JSON Schema

Use the JSON validator to catch syntax errors with precise, line-and-column messages, then optionally validate your data against a JSON Schema to enforce structure, types and constraints.

Frequently asked questions

What does the validator check?+

It strictly validates JSON syntax and reports precise line and column error messages. You can also validate your data against a JSON Schema.

Which JSON Schema features are supported?+

Common draft-07 keywords including type, required, properties, enum, const, minimum/maximum, string length, pattern, format and the anyOf/allOf/oneOf/not combinators.

Formatter

Beautify, minify and sort keys

Viewer

Explore JSON as a collapsible tree

Editor

Edit with live syntax & error checks

Diff

Compare two JSON documents

Converter

JSON ⇄ CSV, YAML, XML, code

JSONPath

Query JSON with JSONPath