A Complete Toolkit for JSON and Text Processing
Format JSON Online is a free, all-in-one JSON tool to format, validate, minify, and compare JSON. Convert JSON to CSV, XML, Dart, or JavaScript — all in your browser, no login needed. Now with AI-powered error fixing and URL sharing capabilities.
Format JSONValidate JSONVisualizer JSON
Try Our Format JSON Online
Input JSON
Upload JSON File
Formatted JSON tree will appear here...
Formatting Options
Indent Size: 2
Indent Style
Spaces
Tabs
Quote Style
Double Quotes (")
Single Quotes (')
Sort Object Keys Alphabetically
Add Trailing Commas
Comprehensive JSON Features
Everything you need to work with JSON data, from basic formatting to advanced AI-powered features.
Core Features
JSON Formatting & Beautification
Advanced JSON Validation
JSON Comparison & Diff
JSON Minification
JSON Search & Filter
Tree View Visualization
Sharing & Export
URL Sharing with Compression
QR Code Generation
Multiple Export Formats
Shareable Links
One-Click Copy
File Upload Support
AI & Automation
AI-Powered Error Fixing
Intelligent Suggestions
Auto-Completion
Smart Formatting
Pattern Recognition
Intelligent Filtering
Advanced Features & Capabilities
Powerful features designed for modern developers and teams.
URL Sharing & Collaboration
Generate shareable links for your JSON data with compression and encoding for easy collaboration.
Compressed URLs
QR Code Generation
Expiration Settings
Password Protection
AI-Powered Tools
Leverage artificial intelligence for JSON validation, error fixing, and intelligent suggestions.
Auto Error Fix
Smart Suggestions
Pattern Recognition
Context Awareness
Performance Optimized
Lightning-fast processing with Web Workers, client-side processing, and optimized algorithms.
Web Workers
Client-Side
Large File Support
Real-time Processing
Privacy & Security
Your data stays secure with client-side processing, no server storage, and encrypted sharing.
Client-Side Only
No Data Storage
Encrypted Sharing
HTTPS Secure
Mobile Responsive
Fully responsive design that works perfectly on desktop, tablet, and mobile devices.
Touch Friendly
Responsive UI
Mobile Optimized
Cross-Platform
Customizable Interface
Personalize your experience with dark/light themes, custom formatting, and layout options.
Dark/Light Theme
Custom Colors
Layout Options
Font Choices
From AI-powered generation to instant validation and diffing, FormatJSONOnline has every tool you need to work with JSON faster and smarter.
AI JSON Generator
Effortless JSON Formatter
Visual Diff Checker
Instant Mock API
Seamless Chrome Extension
Interactive JSON Data Visualization Tool
Advanced JSON visualizer with multiple view modes: interactive graphs, tree views, tables, and more.
Translate JSON
Download JSON Files by Size (Bytes, KB, MB)
Free Online SQL Formatter & Beautifier
Popular JSON Tools
Our most-used tools for JSON processing, validation, and conversion.
JSON Formatter & Beautifier
Format and beautify JSON with syntax highlighting, tree view, customizable indentation, and advanced formatting options.
Tree ViewSyntax HighlightingCustom IndentationURL Sharing
JSON Validator with AI Fix
Validate JSON syntax with detailed error reporting and AI-powered automatic error fixing capabilities.
Error Line NumbersAI Auto-FixDetailed ErrorsSuggestions
JSON Compare & Diff
Compare two JSON files with visual diff highlighting, side-by-side view, and detailed change analysis.
Visual DiffSide-by-SideChange StatsExport Diff
JSON Minifier & Compressor
Minimize JSON size by removing whitespace, comments, and unnecessary characters for production use.
Size ReductionCompression StatsBatch ProcessingDownload
JSON to XML Converter
Convert JSON data to XML format with customizable formatting, attribute handling, and namespace support.
Custom FormattingAttributesNamespacesValidation
JSON to Excel Converter
Transform JSON into Excel spreadsheets with automatic column detection, nested object flattening, and formatting.
Auto ColumnsNested SupportFormattingMultiple Sheets
Why Choose FormatJSONOnline?
Our tools are designed with developer productivity, security, and user experience in mind.
All in One Toolkit
Everything you need to work with JSON in one place - no need to switch between multiple tools.
Privacy First
All processing happens in your browser. Your JSON data never leaves your device.
No Installation Required
Use our tools instantly in your browser without downloading or installing any software.
How to Use Our JSON Tools
Get started with our JSON tools in just a few simple steps.
1. Input JSON
Paste, upload, or drag & drop your JSON data
2. Choose Options
Select formatting, validation, or conversion options
3. Process
Let our tools format, validate, or convert your JSON
4. Share & Export
Download, copy, or share your results with others
Latest JSON Tutorials & Tips
Learn JSON best practices, advanced techniques, and stay updated with the latest developments.
Frequently Asked Questions
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format that's easy for humans to read and write. It's based on a subset of JavaScript but is language-independent and widely used for data exchange between servers and web applications. <br /> <strong>Example:</strong> <pre><code> { "name": "John Doe", "age": 30, "isStudent": false, "courses": ["Math", "Science"], "address": { "street": "123 Main St", "city": "Boston" } } </code></pre>- For a complete overview, see our full Guide to JSON
What tools does FormatJSONOnline offer?
FormatJSONOnline offers a comprehensive suite of JSON tools including JSON Formatter, JSON Validator with AI-powered error fixing, JSON Compare with visual diff, JSON Minifier, JSON to XML/CSV/Excel Converter, Dummy JSON generator, URL sharing capabilities, and many more advanced features for developers.
Is my data secure when using these tools?
Yes, all processing happens entirely in your browser using client-side JavaScript. Your JSON data never leaves your device or gets sent to our servers (except when using AI features, which are processed securely and not stored). This ensures complete privacy and security for your sensitive data.
Do I need to create an account to use these tools?
No, all our tools are freely available without requiring any registration or account creation. You can use them immediately without any login or signup process. However, creating an account would allow you to save your work and access additional features.
How do I format JSON?
To format JSON, simply paste your JSON data into our formatter tool, select your preferred indentation size (2-8 spaces or tabs), choose formatting options like quote style and key sorting, then click 'Format JSON'. The tool will automatically format your JSON with proper indentation, line breaks, and syntax highlighting.
How do I open a JSON file?
JSON files can be opened in any text editor like Notepad, VS Code, or Sublime Text. For viewing and editing with our tools, you can either upload the file directly using the upload button, drag and drop it into the input area, or copy and paste its contents. You can also convert JSON files to Excel, CSV, or other formats using our conversion tools.
Can I share my JSON data with others?
Yes! Our URL sharing feature allows you to generate shareable links for your JSON data. The data is compressed and encoded in the URL, so recipients can view your formatted JSON without you having to send files. You can also generate QR codes for easy mobile sharing.
What is the AI-powered JSON fixing feature?
Our AI-powered JSON validator can automatically detect and fix common JSON syntax errors like missing quotes, trailing commas, incorrect brackets, and more. When validation fails, simply click the 'Fix with AI' button and our intelligent system will attempt to correct the errors and provide a valid JSON output.