A simple, interactive JSON formatter built with vanilla HTML, CSS, and JavaScript. Paste messy JSON into the textarea, hit "Format JSON", and get pretty-printed output with 2-space indentation. Handles errors gracefully—ideal for quick debugging!

• One-Click Formatting: Parses and beautifies JSON instantly.
• Error Handling: Shows clear messages for invalid input.
• Mobile-Friendly: Responsive design for any device.
• Privacy-First: All client-side; no data leaves your browser.
• Sample Ready: Starts with a fun JSON example.

Input (messy): {"id":1,"name":"Anil","skills":["React","Next.js","JSON"]}
Output (formatted):

{ "id": 1, "name": "Anil", "skills": [ "React", "Next.js", "JSON" ] }

Try it here (update with your GitHub Pages URL after setup).

1. Fork this repo.
2. Enable GitHub Pages in Settings > Pages (source: main branch).
3. Customize the sample JSON or add validation in index.html.
4. Deploy and share!

This is a mini-demo—explore FormatJSONOnline.com for 40+ tools: validators, minifiers, comparators, converters, and more. 100% free, ad-free, privacy-focused! ⭐

• HTML5 for structure
• CSS3 for clean styling (flexbox, shadows)
• Vanilla JS for parsing (JSON.parse/stringify)

• Fork & PR enhancements (e.g., add copy button or themes).
• Issues? Open one for bugs or ideas!

Built with ❤️ for devs. Questions? Contact via FormatJSONOnline.
Last updated: October 2025

A collection of powerful, fast, and free JSON tools designed for developers, students, and data analysts.

• ✅ JSON Formatter – Beautify, format, and preview JSON data.
• 🔍 JSON Validator – Validate JSON structure against standards.
• 🪄 JSON Minify – Compress JSON by removing unnecessary spaces.

• 🆚 JSON Compare – Find differences between two JSON inputs.
• 🔎 JSON Filter – Extract or filter JSON keys using dot notation.
• 🧭 JSON Path Finder – Instantly get the JSON path to a value.

• 🔁 JSON to XML – Convert JSON to clean XML.
• 📑 JSON to CSV – Flatten and export JSON to CSV format.
• 🔤 JSON to String – Convert objects into stringified JSON.
• 🧵 JSON Stringify – Safely stringify JSON data for APIs.
• 🐦 JSON to Dart – Generate Dart model classes from JSON.

• 🎯 AI JSON Generator – Generate test JSON using AI prompts.
• 🧪 Dummy JSON Generator – Get realistic placeholder JSON.
• 🧬 Dummy API Generator – Create fake API endpoints from JSON.

📌 All tools are 100% free, browser-based, and privacy-friendly.
🌐 Visit the main site: https://formatjsononline.com

Have a feature request or found a bug? I'd love to hear from you! Please open an issue in this repository to let me know.

This repository contains the public-facing information for the FormatJSONOnline.com project. The project itself is a proprietary tool. The content in this repository is available under the MIT License.