What makes this JSON formatter different from others?

Our JSON formatter includes unique features like real-time schema validation, visual tree navigation, JSON path querying, performance analysis, diff comparison, and automatic schema generation. It's designed for both developers and data professionals.

Can I format extremely large JSON files?

Yes! Our formatter is optimized for performance and can handle large JSON files efficiently. The progressive rendering and memory optimization ensure smooth operation even with files up to 100MB.

Does the formatter support JSON with comments?

While standard JSON doesn't support comments, our formatter includes a JSONC (JSON with Comments) mode that preserves and validates comments in your JSON files, making it perfect for configuration files.

How accurate is the schema validation?

Our schema validation uses industry-standard JSON Schema validation with additional custom rules. It provides detailed error messages and suggestions for fixing invalid JSON structures.

Can I save and share my formatted JSON?

Yes! You can save formatted JSON to your browser's storage, export it as a file, generate shareable links, and even create permalinks for collaborative work.

What security measures are in place?

All JSON processing happens locally in your browser - no data is sent to our servers. We also include security features like max depth protection, circular reference detection, and size limits to prevent crashes.

Advanced JSON Processing Toolkit

Free Online JSON Formatter & Validator

Transform your JSON workflow with our comprehensive formatter featuring real-time validation, interactive tree visualization, JSONPath query engine, and JSON schema generation. Compare JSON side-by-side, analyze performance metrics, import/export files, enjoy syntax highlighting with error detection, manage history and favorites, and choose from multiple formatting options— essential for developers, API integration, data analysis, and any JSON processing task.

Advanced JSON Formatter & Validator

Format, validate, analyze, and transform JSON with advanced tools including schema generation, diff comparison, and performance insights

Input JSON

Import File

Formatted JSON

Formatting Options

Indentation: 2 spaces

Sort keys alphabeticallyWord wrap

JSON Examples & Templates

Quick-start templates and examples for common JSON structures

Simple Object

basic

Basic JSON object with string and number values

{

Nested Structure

advanced

Deeply nested JSON structure

{

Array of Objects

basic

Array containing multiple objects

[

API Response

api

Typical API response structure

{

Configuration

config

Application configuration JSON

{

Complex Data

advanced

Complex JSON with mixed data types

{

Performance Insights & Best Practices

Optimize Large JSON

Use tree-shaking and selective parsing for better performance with large datasets

Memory Management

Our formatter uses streaming and chunked processing to handle files up to 100MB efficiently

Security First

All processing happens locally in your browser - no data is sent to external servers

Developer Tools

Integrated validation, schema generation, and diff tools streamline your development workflow

What Developers Say

Join thousands of developers who rely on our JSON formatter

“This JSON formatter is incredible! The schema validation and real-time linting have saved me hours of debugging. The visual tree view makes complex JSON structures so much easier to understand.”

- Alex M., Full Stack Developer

Frequently Asked Questions

Get answers to common questions about JSON formatting and validation