{ }
JSON Formatter & Validator
Paste your JSON to format, validate and explore it as a tree. Everything runs in your browser.
Paste your JSON here
Paste any JSON above and click Format to visualize it.
Why Use This JSON Formatter?
- 🌲 Tree View — Explore nested structures with collapsible nodes
- ✅ Instant Validation — Syntax errors are highlighted immediately
- ⚡ Minify — Compress JSON to the smallest possible size
- 🔒 100% Private — Your data never leaves the browser
How to Use the JSON Formatter
- 1Paste your raw or minified JSON into the input box.
- 2Click “Format JSON” (or press Ctrl+Enter) to parse and display it.
- 3Switch between Tree view and Raw view to explore your data.
- 4Click any object or array to collapse / expand it.
- 5Use Copy or Download to export the formatted result.
Frequently Asked Questions
- Is this JSON formatter free?
- Yes, completely free with no signup required.
- Is my JSON data sent to a server?
- No. All parsing and formatting happens entirely in your browser using JavaScript. Your data never leaves your device.
- What is the maximum JSON size this tool supports?
- There is no hard limit imposed by the tool itself. Performance depends on your browser's JavaScript engine — most modern browsers handle files up to several MB without issues.
- Can I use this to validate JSON syntax?
- Yes. If your JSON has syntax errors, the tool displays the exact error message from the JavaScript parser, making it easy to locate and fix the issue.
- What does the Minify button do?
- Minify removes all whitespace and line breaks, producing the most compact valid JSON string. This is useful for reducing payload size when sending JSON over a network.