JSON Formatter & Validator
Format, validate, prettify, and minify JSON code client-side with syntax error detection and customizable indentation.
1How to Use JSON Formatter & Validator
JSON (JavaScript Object Notation) is an open standard file and data exchange format that uses human-readable text to store and transmit data objects.
- Step 1.Paste your raw, unformatted, or minified JSON text into the editor.
- Step 2.Choose your desired indentation style (2 Spaces, 4 Spaces, or Tab).
- Step 3.Click "Format JSON" to beautify or "Minify" to compact the payload into a single line.
- Step 4.Click "Copy" or "Download" to save your validated JSON payload.
2Formulas, Methodology & Key Features
JSON Syntax Validation Rules
RFC 8259 defines strict rules for valid JSON strings that parsers enforce:
3Common JSON Syntax Errors & Corrections
| Invalid Syntax Example | Error Cause | Valid RFC Correction |
|---|---|---|
| {'name': 'Alex'} | Single quotes used | {"name": "Alex"} |
| {"age": 28,} | Trailing comma after item | {"age": 28} |
| {name: "Alex"} | Unquoted key name | {"name": "Alex"} |
| {"val": undefined} | undefined is not valid JSON | {"val": null} |
| {"count": 012} | Leading zeros in numbers | {"count": 12} |
?Frequently Asked Questions (FAQ)
Common questions answered about JSON Formatter & Validator.
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