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.

About Us | jsoneditor.io

Our Mission

jsoneditor.io was created with a simple goal: to provide developers with a fast, powerful, and privacy-focused JSON editor that works right in the browser. We believe that developer tools should be accessible to everyone, which is why jsoneditor.io is free to use.

Who We Are

jsoneditor.io is a product of Polyxmedia Ltd, a software development company focused on building useful tools for developers and businesses. We are passionate about creating high-quality software that solves real problems.

What We Offer

Our JSON editor provides a professional editing experience with features including:

VS Code-like editing experience powered by Monaco Editor
JSON formatting, validation, and minification
Conversion between JSON, YAML, CSV, and TypeScript
AI-powered assistance for complex transformations
Complete privacy with all processing happening locally in your browser
No signup or registration required

Our Commitment to Privacy

We take your privacy seriously. All JSON processing happens locally in your browser, meaning your data never leaves your device unless you explicitly choose to use features that require external processing (such as AI assistance). We do not sell or share your personal information with third parties.

Technology

jsoneditor.io is built using modern web technologies including Next.js, React, and TypeScript. We use the Monaco Editor (the same editor that powers VS Code) to provide a familiar and powerful editing experience. The application is hosted on Vercel for fast, reliable performance worldwide.

Get in Touch

We love hearing from our users. Whether you have feedback, feature requests, or just want to say hello, feel free to reach out to us at hello@polyxmedia.com. You can also visit our contact page for more ways to connect.