JSON Formatter & Validator
Format, beautify, minify, and validate JSON data with syntax highlighting and tree view.
About JSON Formatter & Validator
Validate JSON payloads, fix nesting, minify for production, or beautify with custom 2-space or 4-space indentation. Features error line indicators and tree viewer.
How to Use JSON Formatter & Validator
Paste your JSON code into the editor.
Click "Format JSON" to beautify or "Minify" to compact.
Check validation status; syntax errors are flagged with line and column numbers.
Copy formatted JSON or download as a `.json` file.
Supported Formats & Limits
- Supported Inputs: JSON, TEXT
- Guest Maximum Size: 25 MB
- Logged-in Max Size: 100 MB
- System Compatibility: Windows, macOS, Linux, iOS & Android
Privacy & Security Guarantee
This tool processes your files entirely inside your web browser using client-side JavaScript, WebAssembly, and Canvas APIs. Your document is never uploaded to any external server, guaranteeing total confidentiality.
Frequently Asked Questions
Can it parse JSON with trailing commas or unquoted keys?
Our validator checks strict RFC 8259 compliance and displays the exact character where standard JSON syntax fails.