Learn JSON
In-depth guides, practical examples, common error fixes, and quick reference cheat sheets. Everything you need to work with JSON confidently.
Developer Guides
What is JSON? A Complete Guide for Beginners
Learn the fundamentals — data types, syntax rules, and real-world use cases.
JSON vs YAML: Differences, Pros & Cons
Side-by-side comparison with examples from Docker, Kubernetes, and CI/CD.
JSON vs XML: Which Format Should You Use?
Feature comparison, performance benchmarks, and when XML still wins.
How to Format JSON: Methods, Tools & Best Practices
Online tools, CLI commands, programmatic approaches, and the indentation debate.
How to Fix Invalid JSON: Common Errors & Solutions
The top 10 JSON errors with before/after code examples and quick fixes.
Convert JSON to CSV: Complete Guide
Flattening strategies, nested data handling, and code examples in JS & Python.
JSONPath Tutorial: Query JSON Like a Pro
All operators, filter expressions, 15+ practical examples, and multi-language code.
JSON Schema: What It Is and How to Use It
Types, constraints, composition, $ref, and a real validation example.
JWT Tokens Explained: Structure, Security & Decoding
Header, payload, signature decoded. Signing algorithms, security practices, sessions vs JWTs.
JSON API Best Practices for Developers
Naming conventions, pagination patterns, error handling, and performance tips.
How to Test REST APIs in Your Browser
HTTP methods, headers, authentication, status codes, and CORS — with hands-on examples.
Generate Typed Code from JSON in 8 Languages
TypeScript interfaces, Python dataclasses, Go structs, Rust serde, and more from a single JSON input.
JSON Templates for Developers
Ready-to-use templates for REST APIs, config files, database schemas, and cloud infrastructure.
JSON Examples
JSON Object
Structure, syntax, and key/value pairs
JSON Array
Arrays of strings, numbers, objects, and mixed types
Nested JSON
Complex multi-level structures and access patterns
API Response
Success, error, and paginated response patterns
Config Files
package.json, tsconfig.json, and other config patterns
Null & Booleans
When and how to use null, true, and false
String Escaping
Special characters, escape sequences, and unicode
Number Types
Integers, floats, precision issues, and edge cases
Fix JSON Errors
Unexpected Token
Trailing commas, comments, single quotes
Trailing Comma
Extra comma after the last item in object or array
Unterminated String
Missing closing quotes and unescaped characters
Missing Bracket or Brace
Unclosed arrays and objects, truncated JSON
Duplicate Keys
Same key appearing multiple times in an object
Invalid Escape Sequence
Invalid backslash sequences and Windows paths
Invalid Number Format
Leading zeros, NaN, Infinity, and hex numbers