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.
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The Ultimate JSON Toolkit, Reimagined.
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
Transform plain text into valid JSON with AI. Describe your data and let our tool build the structure for you.
Effortless JSON Formatter
Instantly beautify messy or minified JSON into a clean, human-readable format. Perfect for debugging.
Visual Diff Checker
Compare two JSON files side-by-side with clear, color-coded highlights for additions, deletions, and changes.
Instant Mock API
Generate a live API endpoint from your JSON data. Ideal for rapid prototyping without any backend setup.
Seamless Chrome Extension
Access all our powerful JSON tools directly from your browser toolbar for maximum productivity on any website.
Interactive JSON Data Visualization Tool
Advanced JSON visualizer with multiple view modes: interactive graphs, tree views, tables, and more.
Translate JSON
Translate JSON data from one language to another with our free online JSON translator. Perfect for i18n, API localization, and multilingual apps.
Download JSON Files by Size (Bytes, KB, MB)
Generate and download JSON files with exact sizes (Bytes, KB, MB). Perfect for testing API limits, uploads, and performance.
Free Online SQL Formatter & Beautifier
Free online SQL formatter for MySQL, PostgreSQL, SQLite & more. Beautify, validate & fix SQL instantly to improve readability and catch errors fast.
Why Choose FormatJSONOnline?
Our tools are designed with developer productivity 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.
Ready to Get Started?
Choose from our suite of JSON tools to start processing your data right away.
JSON to String Converter
Instantly convert JavaScript objects to JSON strings with advanced formatting, syntax highlighting, real-time preview, and multiple export options.
JSON Validator
Verify your JSON syntax and identify errors in your code.
JSON Compare
Compare two JSON files and identify the differences between them.
JSON Minifier
Remove whitespace and reduce the size of your JSON files.
JSON to XML
Convert your JSON data to XML format for different applications.
JSON to Excel
Turn JSON into Excel with our JSON to Excel tool. Fast, free conversions for easy data analysis.
Latest JSON Tutorials & Tips
Learn JSON best practices, advanced techniques, and stay updated with the latest developments.
Effortlessly Translate JSON Content with the Online JSON Translator
A comprehensive guide to using the formatjsononline.com JSON Translator to translate the values in your JSON files while preserving the structure.
How to Create a Mock API for Free in Under 60 Seconds
Stop waiting for a backend. Learn the fastest way to create a live, shareable mock REST API from scratch for free, using nothing but a text prompt and AI.
How to Parse and Manipulate JSON in JavaScript
Learn how to parse and stringify JSON in JavaScript using `JSON.parse()` and `JSON.stringify()` with real-world examples and error handling techniques.
Frequently Asked Questions
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format... <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 fullGuide to JSON
What tools does FormatJSONOnline offer?
FormatJSONOnline offers a comprehensive suite of JSON tools including JSON Formatter, JSON Validator, JSON Compare, JSON Minifier, JSON to XML Converter, JSON to CSV Converter, and Dummy JSON generator for testing purposes.
Is my data secure when using these tools?
Yes, all processing happens entirely in your browser. Your JSON data never leaves your device or gets sent to our servers. This ensures complete privacy and security for your 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.
How do I format JSON?
To format JSON, paste your JSON data into our formatter tool, select your preferred indentation size, and click 'Format JSON'. The tool will automatically format your JSON with proper indentation and line breaks to make it more readable.
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, use our JSON formatter tool by uploading the file or copying its contents. You can also open JSON files in browsers, or convert them to Excel format using our JSON to Excel converter.