JSON Schema Validator
Paste a schema and document to check types, required fields, enums, lengths, ranges, and nested properties. Validate a JSON document against a JSON Schema with
Introduction
JSON Schema Validator is a free, browser-based utility in our JSON Tools collection. Paste a schema and document to check types, required fields, enums, lengths, ranges, and nested properties. JSON Schema Validator runs practical schema checks in the browser for type, required, properties, items, and common constraints - helpful for API contract smoke tests. Everything runs locally in your browser — inputs stay on your device, with no account or upload required. Highlights include type/required checks.
Features
- type/required checks
- nested properties
- array items
- pattern/min/max
How to use
- 1Paste schema and JSON document.
- 2Review pass/fail errors.
Example
Required field
Inputrequired: ["name"]Output
Error if name missing
Benefits
- Run JSON Schema entirely in the browser with no signup or installation.
- Keep sensitive sample data private — processing never leaves your device.
- type/required checks
- nested properties
- array items
- Pair it with JSON Formatter and JSON Diff when your workflow needs adjacent utilities.
FAQs
No. It covers common Draft-like constraints, not every keyword.
No.
Practical subset compatible with everyday schemas.
Yes. JSON Schema on EverydayDevTools is free, with no account, watermarks, or usage caps for normal interactive use.
No. JSON Schema runs in your browser. Your input is processed locally and is not sent to EverydayDevTools servers.
Paste a schema and document to check types, required fields, enums, lengths, ranges, and nested properties. It fits everyday json tools tasks when you want a fast local utility instead of installing a CLI or opening a heavy IDE feature.
Core capabilities include: type/required checks; nested properties; array items; pattern/min/max.
Developers often pair JSON Schema with JSON Formatter, JSON Diff, JSON to TS. Open Related tools on this page for quick links.