Languages

JSON Cheat Sheet

Print-ready cheat sheet for JSON, organized for fast lookup, study, and desk-side use

Source: JSON Specification (json.org)
License: MIT
Updated: 2026-03-27

Sample

What's in this cheat sheet

Syntax
Data Types
Objects
Arrays
Nesting
Schema Validation
jq Basics
Common Patterns

Rules

`{ }`	Object (unordered key-value pairs)
`[ ]`	Array (ordered list of values)
`"key": value`	Keys must be double-quoted strings
`No trailing comma`	Last item must not have a comma
`No comments`	JSON does not allow comments

Minimal Example

{
  "name": "Alice",
  "age": 30,
  "active": true
}

Download the full cheat sheet for all sections, formatted for print

Download PDF

Downloads

Choose the treatment that matches how you read

Recommended

Standard

B&W, ink-efficient. The default for laser printers and photocopies

Best for Printouts and desk-side reference

PDF 1 page Letter landscape

Download PDF
Color

Warm color accents for on-screen reading or color printers

Best for Screen reading or color printers

PDF 1 page Letter landscape

Download PDF
Reference Card

Maximum density, 4-column layout. Everything on one page

Best for Fast scanning and minimum paper use

PDF 1 page Letter landscape

Download PDF