JSON Formatter/Validator

Format, validate, query, and minify JSON with syntax highlighting and detailed error messages.

Input JSON 0 characters
Output 0 characters

Query Syntax

. Root object

.key Property access

.a.b.c Nested properties

[0] Array index

[*] All array elements

Examples

.users[0].name

.items[*].id

.config.settings

About JSON Formatting

JSON (JavaScript Object Notation) is a lightweight data interchange format that's easy for humans to read and write. This tool helps you format messy JSON into readable, properly indented structure.

Features

  • Format/prettify JSON with customizable indentation (2 or 4 spaces)
  • Minify JSON by removing all unnecessary whitespace
  • Validate JSON with detailed error messages including line and column numbers
  • Query JSON with jq-like syntax (.key, [0], [*] wildcards)
  • Live filtering - results update as you type your query
  • Syntax highlighting for easy reading
  • Client-side processing - your data never leaves your browser