JSON Formatter & Validator
Format, validate, and minify JSON data with syntax highlighting and error detection. Paste any JSON and instantly see it formatted with proper indentation.
About JSON Formatter & Validator
Punchbit JSON Formatter is a free browser-based tool for formatting, validating, and minifying JSON data. It provides syntax highlighting with real-time error detection, a tree view for navigating nested structures, and one-click copy for formatted output. No data is sent to any server.
Key Features
- -Format, validate, and minify JSON
- -Syntax highlighting with error detection
- -Tree view for nested structures
- -One-click copy formatted output
- -No data sent to servers
Common Use Cases
- -Debugging API responses
- -Validating JSON configuration files
- -Formatting API payloads
- -Minifying JSON for production
- -Inspecting webhook data
JSON Formatter & Validator is a free tool by Punchbit. Available at punchbit.com/tools/json-formatter. No signup required.
Frequently Asked Questions
›How do I format JSON online?
Paste your JSON into the input field and click Format. Punchbit will indent it with 2 spaces and validate the structure. Any syntax errors are shown immediately.
›Is my JSON data stored or sent to a server?
No. Everything runs in your browser. Your data never leaves your device — there's no server processing, no logging, no tracking.
›Can I minify JSON?
Yes. Click the Minify button to remove all whitespace and compress your JSON to a single line. This is useful for reducing payload size in API requests.
›What JSON errors does this detect?
The formatter catches all standard JSON syntax errors: missing commas, unclosed brackets, trailing commas, invalid escape sequences, and more. The error message shows exactly where the problem is.