Guides

JSON guides

Written for people who read and edit JSON at work. The tool is on the home page. Examples can be pasted into HiJSON.

Using the tool

Format & minify
When to pretty-print vs minify, and the HiJSON buttons.
JSONPath basics
From $ to filters, plus multi-field compare.
API debugging
Read a response, extract fields, think before you share.

Getting started

Syntax errors
Trailing commas, quotes, comments, NaN, BOM.
Reading the tree
Objects vs arrays, copy a path, use the outline.

Query & logs

JSONL logs
One object per line — not a single JSON document.
Large JSON
Import files, query paths, slice with jq.

Structure & safety

JSON Schema
Types and required fields beyond “it parsed.”
JSON / YAML / XML
APIs, config, documents, and conversion loss.
JS / Python / Go
undefined, ensure_ascii, omitempty, big ints.
Safety notes
Local parse, share/AI, XSS, prototype pollution.