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Professional JSON platform with 40+ free tools. Format, validate, convert to CSV/XML/PDF. Features AI-powered error fixing, API testing, and code generation. ✓ No signup required
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Your adventure is about to begin
Powerful features designed for modern developers and teams.
Generate shareable links for your JSON data with compression and encoding for easy collaboration.
Leverage artificial intelligence for JSON validation, error fixing, and intelligent suggestions.
Lightning-fast processing with Web Workers, client-side processing, and optimized algorithms.
Core tools run in your browser. Your data is not stored. AI features use secure, anonymous server processing.
Fully responsive design that works perfectly on desktop, tablet, and mobile devices.
Personalize your experience with dark/light themes, custom formatting, and layout options.
From AI-powered generation to instant validation and diffing, FormatJSONOnline has every tool you need to work with JSON faster and smarter.
Transform plain text into valid JSON with AI. Describe your data and let our tool build the structure for you.
Instantly beautify messy or minified JSON into a clean, human-readable format. Perfect for debugging.
Compare two JSON files side-by-side with clear, color-coded highlights for additions, deletions, and changes.
Generate a live API endpoint from your JSON data. Ideal for rapid prototyping without any backend setup.
Access all our powerful JSON tools directly from your browser toolbar for maximum productivity on any website.
Advanced JSON visualizer with multiple view modes: interactive graphs, tree views, tables, and more.
Translate JSON data from one language to another with our free online JSON translator. Perfect for i18n, API localization, and multilingual apps.
Generate and download JSON files with exact sizes (Bytes, KB, MB). Perfect for testing API limits, uploads, and performance.
Free online SQL formatter for MySQL, PostgreSQL, SQLite & more. Beautify, validate & fix SQL instantly to improve readability and catch errors fast.
Get started with our JSON tools in just a few simple steps.
Paste, upload, or drag & drop your JSON data
Select formatting, validation, or conversion options
Let our tools format, validate, or convert your JSON
Download, copy, or share your results with others
Our most-used tools for JSON processing, validation, and conversion.
Format and beautify JSON with syntax highlighting, tree view, customizable indentation, and advanced formatting options.
Validate JSON syntax with detailed error reporting and AI-powered automatic error fixing capabilities.
Compare two JSON files with visual diff highlighting, side-by-side view, and detailed change analysis.
Minimize JSON size by removing whitespace, comments, and unnecessary characters for production use.
Convert JSON data to XML format with customizable formatting, attribute handling, and namespace support.
Transform JSON into Excel spreadsheets with automatic column detection, nested object flattening, and formatting.
Learn JSON best practices, advanced techniques, and stay updated with the latest developments.
A detailed comparison of popular data interchange formats like JSON, XML, CSV, and YAML to help you choose the right one for your next project.
A comprehensive guide to using the formatjsononline.com JSON Translator to translate the values in your JSON files while preserving the structure.
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.
JSON (JavaScript Object Notation) is a lightweight data interchange format that's easy for humans to read and write. It’s language-independent and widely used for data exchange between servers and web applications.
{
"name": "John Doe",
"age": 30,
"isStudent": false,
"courses": ["Math", "Science"],
"address": {
"street": "123 Main St",
"city": "Boston"
}
}👉 For a complete overview, see our full Guide to JSON
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.
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.
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.
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.
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.
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.
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.