JSON Formatter, Validator & Minifier
Format, prettify, validate, and minify JSON data with clear syntax error notifications and tree structure.
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Last Reviewed: August 2026
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4.9/5 Rating (1,420+ Users)
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JSON Specifications (RFC 8259), Data Types, and Schema Validation
JavaScript Object Notation (JSON) is an open-standard file format and data interchange format standardized under RFC 8259. Because of its lightweight syntax and native compatibility with modern programming languages, JSON has become the dominant payload standard for REST APIs, GraphQL, and configuration files.
Core JSON Data Types
- String: Text enclosed strictly in double quotation marks (e.g.
"status": "success"). - Number: Integers and floating-point values without commas (e.g.
42,99.95). - Boolean: Literal
trueorfalse. - Array: Ordered list of values wrapped in square brackets
[ ... ]. - Object: Key-value collection enclosed in curly braces
{ ... }. - Null: Literal representation of empty or nonexistent value (
null).
Frequently Asked Questions (FAQ)
Minification removes all unneeded spaces, indentation, and newlines, cutting network transfer payload sizes and accelerating API response times.
Yes. The formatter executes 100% locally in your browser memory. No payload data or API credentials are ever sent to an external server.
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