Free JSON Validator & Power Tool
Validate, format, and repair JSON instantly. Use JSON Path to query data and validate against custom Schemas—all processed 100% locally in your browser.
JSON Input
Quick Start Guide
Type directly, paste JSON from clipboard, or drop a file anywhere to begin.
JSON Path Query
Use standard JSONPath syntax to filter and extract data.
Schema Validation
Validate business logic against a JSON Schema object.
Query Results
Schema Health
Privacy Shield
100% Client-side. Your JSON never leaves your device.
Smart Repair
Fixes missing quotes, trailing commas, and single quotes automatically.
Pro Tips
Use JSON Path `$.*` to extract all root values instantly.
How to Use the JSON Utility
Enter Data
Paste your raw JSON into the editor. The tool will immediately lint and validate the syntax in real-time.
Apply Repairs
If errors are found, click "Auto-Repair" to fix common syntax issues automatically, and "Beautify" to format for readability.
Query & Export
Use the JSON Path field to extract specific data, or validate against a schema before copying the result to your clipboard.
Why Use Our JSON Validator?
A professional-grade utility designed for developers who need speed, precision, and absolute privacy for their sensitive data.
Smart Auto-Repair
Tired of manually fixing missing commas or unquoted keys? Our smart engine repairs broken JSON structures instantly with one click.
JSON Path Querying
Extract only the data you need from massive JSON files. Use standard query syntax to filter, slice, and pick specific data points.
Local-First Privacy
Unlike other online tools, we process everything on your machine. Your sensitive API keys and user data never leave your browser.
Schema Validation
Ensure your JSON matches business rules. Paste a JSON Schema and get instant feedback on type mismatches and missing fields.
JSON Validator Use Cases
API Debugging
Quickly validate API responses and repair broken payloads before using them in your code or documentation.
Data Transformation
Filter massive JSON datasets using JSON Path to isolate specific records without writing custom scripts.
Schema Development
Test and refine your JSON Schemas against real data samples to ensure robust API contracts.
Configuration Management
Validate complex configuration files before deployment to prevent runtime errors in production.
Frequently Asked Questions
Is my JSON data secure?
Yes, 100%. We use client-side processing, meaning your data stays entirely on your device. We do not store your JSON on our servers.
What is JSON Path?
JSON Path is a query language for JSON, similar to XPath for XML. It allows you to specify a path to reach specific data within the structure.
Can it fix trailing commas?
Yes. The "Auto-Repair" feature handles trailing commas, missing quotes, single quotes, and other common JSON syntax violations.
What is a JSON Schema?
A JSON Schema is a JSON-based format for defining the structure, content, and validation rules for your JSON data objects.
More questions?
Visit our FAQ page