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JSON Schema Validator

v1.0.0

JSON Schema Validator

Validate JSON against a schema with inline errors, presets, and draft selection.

Warning

This tool is not supported on mobile devices, please use a desktop device for better experience.

Schema JSON
Parsed
Data JSON
Parsed
Validation
idle
JSON Schema
361 charsDraft 07
JSON Data
97 charsValidates locally
Validation Results
ErrorsShowing up to 50 items
No detailed errors available.
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What is the JSON Schema Validator?

The JSON Schema Validator is a browser-based tool that checks whether a JSON document conforms to a given JSON Schema. It supports JSON Schema draft-07 and draft-2019-09, and shows detailed inline error messages with field paths and violated keywords — helping you find and fix data issues instantly.

Why Use a JSON Schema Validator?

JSON Schema is the standard way to describe and validate the structure of JSON data. A validator helps you:

  • Catch Data Errors Early: Validate API payloads, configuration files, and database records against a schema before they cause runtime errors.
  • Understand Validation Failures: Get precise error messages with JSON paths and constraint keywords instead of vague failure notices.
  • Develop and Test Schemas: Interactively write and refine your JSON Schema by testing it against real data samples.
  • Keep Data Private: All validation runs locally in your browser; your schema and data never leave your device.

Features of Our JSON Schema Validator Tool

Our JSON Schema Validator is built to make schema-based validation fast and accessible:

  • Draft Support: Choose between JSON Schema draft-07 and draft-2019-09 to match your schema version.
  • Detailed Error Reporting: Every validation failure includes the JSON path to the offending field and the constraint keyword that was violated.
  • Validity Badge: A clear pass or fail indicator tells you at a glance whether your data is valid against the schema.
  • Side-by-Side Editors: Edit the schema and data in separate tabs with syntax highlighting for a smooth writing experience.
  • Local Processing: Validation runs entirely in the browser; no server calls are made with your data.

How to Use the JSON Schema Validator Tool

  1. Enter Your Schema: Paste or write your JSON Schema in the Schema tab. Make sure it is valid JSON with the appropriate schema draft.
  2. Enter Your Data: Paste the JSON document you want to validate in the Data tab.
  3. Select the Draft: Choose the JSON Schema draft version (draft-07 or draft-2019-09) that matches your schema.
  4. Review the Results: Switch to the Results tab to see the validity badge and any error messages with their field paths.

Try Our JSON Schema Validator Tool

Need to validate your JSON data against a schema? Use our JSON Schema Validator to check conformance, explore error details, and develop robust schemas — all in your browser with complete privacy.