JSON Formatter & Validator
Format, beautify, minify, and validate JSON data
What is Json Formatter?
Debugging API responses is a nightmare when the JSON is a single million-character line. The **JSON Formatter & Validator** is a developer's best friend. It takes ugly, minified JSON and turns it into a readable, indented structure. It also catches syntax errors before you deploy code.
How to Use Json Formatter
Paste JSON
Paste your raw JSON string into the input area.
Choose Action
Click "Beautify" to format or "Minify" to compact.
Fix Errors
If invalid, see the error message indicating the line number.
Copy Output
Click the copy button to grab the processed JSON.
It uses the browser's native `JSON.parse()` and `JSON.stringify()` methods. **Validating**: Checks if the string adheres to strict JSON standards. **Formatting**: Adds 2-space indentation.
Why Use This Tool?
**Privacy**: Processing happens 100% in your browser. No data is sent to our servers. **Speed**: Instant feedback for syntax errors. **Accessibility**: Works offline once loaded.
Who Is This For?
**API Integration**: Inspecting payloads from Postman or Network tab. **Config Files**: Editing `package.json` or VS Code settings.
Behind the Technology
React state management for real-time validation without page reloads.
Tips for Best Results
Use 'Minify' before pasting large JSON payloads into database fields to save space.
The error message usually points to the exact character where the syntax breaks.
Remember: Keys must be in double quotes in valid JSON!