JSON Prettifier & Schema Validator

Understanding the JSON RFC 8259 Specification

JavaScript Object Notation (JSON) is defined by IETF RFC 8259 as a lightweight, text-based, language-independent data interchange format. A strict JSON document enforces specific structural rules:

• String Enclosure: All object property keys and string values must be enclosed in double quotes ("key"), single quotes are strictly invalid.
• Trailing Commas: Trailing commas after the last array item or object property are prohibited in RFC 8259.
• Supported Primitives: Objects, Arrays, Strings, Numbers, Booleans (true / false), and null.

The IEEE 754 BigInt Precision Hazard in JavaScript

Native browser JSON.parse() decodes numeric fields into IEEE 754 double-precision floats. If your API returns 64-bit integer IDs (such as Snowflake IDs exceeding 2^53 - 1 or 9007199254740991), native parsing truncates the lower bits. Always encode 64-bit IDs as string primitives in backend serialization layers.