JSON Schema Validator

Name: JSON Schema Validator
Author: Daniel Cáceres López

Fast validator for complex JSON schemas with visual error output.

READY

json_schema_validator.tool

READY

// HOW IT WORKS

The tool parses JSON, reports syntax errors with line and column, and can validate the data against a JSON Schema. Everything runs locally in the browser.

Example

{ "age": 30, } → error: trailing comma at line 1. With a schema requiring age ≥ 0, { "age": -1 } fails the constraint.

Notes

Common pitfalls it catches: trailing commas, single quotes, comments and duplicate keys — none are valid JSON.
Schema validation needs the format keywords (e.g. email, date) enabled to take effect.