JSON Formatter & Beautifier — Free Online Tool
Clean up your messy or minified JSON in seconds. Format, validate, beautify, and browse your JSON data — with real-time tree view and no data uploads.
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Convert between YAML and JSON formats instantly with real-time two-way editing and customizable JSON output.
Beautify Your JSON Instantly
Whether you're debugging an API, working with a config file, or simply exploring JSON data — this tool helps you make sense of it. Paste in your raw or minified JSON and get clean, human-readable output instantly.
Advanced Indentation Control
Choose from tabs or any number of spaces (1–10) to match your code style or project conventions. Auto-formatting is applied live as you type or paste your content.
Built-In Tree Viewer
Our expandable/collapsible tree view allows you to visually explore deeply nested structures without losing context. No plugins, no installs — just clean visualization right in your browser.
Use Cases
- ✅ Format API responses from REST or GraphQL
- ✅ Validate JSON for syntax errors
- ✅ View nested config or database dumps
- ✅ Convert ugly one-liner JSON into readable structure
- ✅ Explore third-party SDK or app data objects
Why Use ToolMateX's JSON Formatter?
- 🚀 Fast, lightweight, and runs locally
- 🔒 100% private — your data never leaves your device
- 🧩 No login, no ads, no tracking
- 💡 Built for developers, by a developer
How to Use
- Paste or type your raw JSON in the input box
- Choose indentation type (tabs or spaces)
- View formatted result in real time
- Explore data structure via tree view
- Copy or download the output as needed
Frequently Asked Questions (FAQs)
Why Use ToolMateX
Tired of bloated tool websites with 10 ads per click? This platform is built for speed, simplicity, and reliability. Whether you're debugging JSON or testing colors, we’ve got your back.
Free to Use, Forever
All tools run right in your browser, fast, reliable, and available whenever you need them. No ads, and nothing to install.
Works Offline (Most of Them)
Most of my tools work directly in your browser without needing a server. Perfect for fast workflows (even if you’re offline).
Made by a 1-Person Team
Made by someone who actually uses these tools daily. It’s fast, clean, and made with your workflow in mind, not corporate KPIs.