{}JSON FYI
Topic

JSON references

Cheatsheets, comparisons, and complete references.

Tools

JSONPath Finder

Click any node to copy its JSONPath.

JSON to XML

Convert JSON into well-formed XML with attributes.

JSON to YAML

Convert JSON into idiomatic YAML 1.2.

JSON Schema Validator

Validate JSON data against a JSON Schema — powered by Ajv.

Guides

What is JSON?

A complete syntax overview.

JSON vs YAML vs XML

Side-by-side comparison.

JSON escape characters

Complete escape table and pitfalls.

JSON data types

Complete reference for all six types.

How to validate JSON in code

JS, Python, Bash recipes.

JSONPath cheatsheet

Selectors, wildcards, filters.

JSON best practices for APIs

Naming, nullability, dates, errors.

Python JSONDecodeError

json.loads() error causes and fixes with code examples.

JSON.parse() in JavaScript

Complete guide: syntax, reviver, safe parsing, and common errors.

JSON.stringify() in JavaScript

Complete guide: replacer, space, toJSON(), circular refs.

Read and write JSON in Python

json.load(), json.loads(), json.dump(), json.dumps() with examples.

JSON arrays guide

Syntax rules, nesting, accessing elements, and common mistakes.

JSON Schema guide

Types, required fields, patterns, $ref, and Ajv validation examples.

ValueError: No JSON object could be decoded

The Python/requests error that means the body wasn't JSON.

JSON objects guide

Key rules, nesting, accessing values, and common mistakes.