Validate JSON data against a JSON Schema. Clear error messages with JSON Pointer paths show exactly where validation fails.
Open JSON Schema Validator → free, no sign-inJSON Schema is the standard way to define the structure and constraints of a JSON document — required fields, data types, allowed values, nested object shapes. But validating JSON against a schema manually is impractical. The JSON Schema Validator takes both your schema and your data, validates them instantly, and shows any errors with JSON Pointer paths so you know exactly where the problem is.
Developers validating API request and response shapes, teams writing JSON Schema definitions for configuration or data files, QA engineers verifying that data matches its specification.
No tutorials. No learning curve. Open it and get started.
No server uploads. Error messages include JSON Pointer paths — so you know exactly which field failed validation, not just that validation failed.
Completely free. No trial period. No premium tier for basic functionality. No account required. Use it as often as you need.
One job, done well. JSON Schema Validator was built to solve a specific problem cleanly. No feature bloat, no ads, no distractions.
What is JSON Schema?
A vocabulary for annotating and validating JSON documents — defines required fields, data types, allowed values, and structural constraints.
What is a JSON Pointer?
A string like /users/0/email that identifies a specific location within a JSON document.
What schema versions are supported?
Draft 4, 6, 7, and 2019-09.
Can I validate large JSON documents?
Yes — processing runs locally.
Where can I learn JSON Schema?
json-schema.org is the reference — the vocabulary for basic validation is learnable in an afternoon.
Free. Instant. No sign-in. Open it and get the job done.
Open JSON Schema Validator on Doathingy.com →