JSON Editor (jsoneditor.io) is a free online tool for editing, formatting, validating, and converting JSON data. It provides a VS Code-like editing experience with Monaco Editor, offering syntax highlighting, real-time error detection, auto-completion, and AI-powered assistance. Unlike desktop applications, it runs entirely in your browser with no installation required.

Is JSON Editor free to use?

Yes, jsoneditor.io is completely free to use with no signup, registration, or credit card required. All features including JSON formatting, validation, minification, and conversion to YAML/CSV/TypeScript are available at no cost. There are no usage limits or premium tiers.

What formats can JSON Editor convert to?

JSON Editor supports bidirectional conversion between JSON and multiple formats: JSON to YAML (and YAML to JSON), JSON to CSV (ideal for spreadsheet export to Excel or Google Sheets), and JSON to TypeScript type definitions (for generating TypeScript interfaces from JSON data). All conversions happen instantly in your browser.

Is my data safe with JSON Editor?

Yes, your data remains completely private. All JSON processing happens locally in your browser using client-side JavaScript. Your data is never uploaded to any server, never stored, and never shared with third parties. This makes jsoneditor.io safe for working with sensitive or confidential data.

How do I format JSON online?

To format JSON online: 1) Go to jsoneditor.io, 2) Paste your unformatted or minified JSON into the editor, 3) Click the "Format" or "Pretty" button in the toolbar. Your JSON will be instantly beautified with proper indentation, line breaks, and spacing. You can also use keyboard shortcuts (Shift+Alt+F) to format quickly.

How do I validate JSON?

JSON validation at jsoneditor.io is automatic. Simply paste your JSON into the editor, and it will instantly highlight any syntax errors with red underlines. Hover over errors to see detailed descriptions of what went wrong (missing commas, unmatched brackets, invalid characters, etc.). The editor also suggests fixes for common JSON errors.

What is the best free JSON editor online?

jsoneditor.io is widely considered one of the best free JSON editors online. It combines a professional VS Code-like interface (Monaco Editor), comprehensive features (format, validate, convert, compare), AI assistance for complex transformations, and complete privacy (all processing happens in your browser). It works on any device with a modern web browser.

Can I convert JSON to YAML online?

Yes, jsoneditor.io provides instant JSON to YAML conversion. Paste your JSON data, click Convert, and select "JSON to YAML". The conversion preserves your data structure while reformatting it into valid YAML syntax. You can also convert YAML back to JSON using the same tool.

How do I convert JSON to CSV for Excel?

To convert JSON to CSV for Excel: 1) Go to jsoneditor.io, 2) Paste your JSON array (must be an array of objects), 3) Click Convert and select "JSON to CSV". The tool automatically flattens nested objects and creates column headers from your JSON keys. Download the CSV file and open it directly in Excel or Google Sheets.

Does JSON Editor work offline?

While jsoneditor.io is a web application that requires an initial internet connection to load, most of its functionality works after the page loads since all processing happens in your browser. For fully offline JSON editing, the page can be cached by your browser for subsequent offline use.

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The most powerful JSON editor online

Edit, View, Transform JSON

A free, browser-based JSON editor with VS Code-like experience. Format, validate, convert JSON to YAML, CSV, and TypeScript instantly. No signup required. All processing happens locally in your browser for complete privacy.

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512MB

Max file size

10+

Output formats

Powered assistance

Free

To use

Powerful features, built for developers, by developers...

Built with ease of use in mind, and with the vision to extend it to turn it into something even more useful, contribute with ideas and submit feedback, see what else we offer.

Query and transform JSON data

Easily query your JSON data and transform it based on your specific requirements. Use powerful tools to manipulate your JSON structures and view results in real-time.

Offline JSON Editor support

Access and use the JSON Editor offline to work on your JSON files without needing an internet connection. Perfect for on-the-go development.

Repair JSON files

Automatically detect and repair errors in your JSON data. The editor identifies common issues and suggests or applies fixes to maintain valid JSON structures.

JSON to CSV and CSV to JSON conversion

Seamlessly convert your JSON data into CSV format and vice versa. Use this feature to handle data conversions for use in spreadsheets and databases.

Online JSON editor and JSON viewer

View, edit, and format JSON data directly in your browser. Perfect for developers who need a reliable tool for quick modifications and visualizations.

Load, save, and share JSON online

Store and share your JSON files in the cloud. Enable easy collaboration by generating sharable links and keeping your data accessible across devices.

JSON formatter and beautifier

Automatically format and beautify your JSON data. Add proper indentation and white space to make your data more readable and easier to work with.

Compare JSON documents

Compare two JSON files side by side to identify differences. Highlight modifications, additions, or deletions between versions of your JSON data.

Sharable links

Create sharable links for your JSON objects, allowing others to view and collaborate on your data easily. All files are stored securely in the cloud.

AI integration

Integrate AI to generate, modify, and fix JSON objects on the fly. This feature provides advanced AI-powered tools to work with JSON data more intelligently.

Process large JSON files (up to 512 MB)

Handle large JSON files with ease, up to 512 MB. The editor is optimized for performance, allowing you to work with large data sets without lag.

Text mode, tree mode, and table mode

View and edit your JSON data in multiple formats: text mode for raw data, tree mode for structured visualization, and table mode for easy navigation.

JSON Schema validation

Validate your JSON files against a predefined schema. Ensure your data conforms to expected structures for easier integration with APIs and databases.

YAML and XML support

Work with multiple data formats including YAML and XML. Convert between formats seamlessly and edit with full syntax highlighting support.

Multi-tab workspace

Open multiple files in tabs, organize them into folders, and switch between them instantly. A familiar VS Code-like experience for managing your data files.

Why Choose jsoneditor.io?

The best free JSON editor online. No signup, no limits, complete privacy.

Feature	jsoneditor.io	Other Tools
Free to use	Yes	Often limited
No signup required	Yes	Usually required
VS Code-like editor	Yes	Basic editors
Privacy (local processing)	Yes	Server-side
JSON to YAML/CSV/TypeScript	Yes	Limited formats
AI assistance	Yes	Rarely
Large file support (512MB)	Yes	Often limited
Multi-tab workspace	Yes	Single file

Who Uses jsoneditor.io?

Developers
Format API responses, validate JSON schemas, convert data between formats, and debug JSON payloads with syntax highlighting and error detection.
Data Analysts
Convert JSON data to CSV for Excel or Google Sheets analysis. Transform nested JSON structures into flat tabular formats.
DevOps Engineers
Convert between JSON and YAML for Kubernetes configs, Docker Compose files, and CI/CD pipelines. Validate configuration files before deployment.
API Designers
Format and beautify JSON responses, generate TypeScript interfaces from JSON data, and validate against JSON Schema specifications.