Learn JSON tooling the answer-first way

What is JSON?

JSON (JavaScript Object Notation) is a lightweight, text-based format for representing structured data as objects and arrays. It is language-independent, human-readable, and the dominant payload format for REST APIs, configs, and webhooks.

JSON vs YAML

JSON is stricter and ubiquitous for APIs; YAML is more human-friendly for configs and supports comments. Choose JSON for machine interchange and YAML for editable infrastructure manifests—then convert when needed.

How to validate JSON

To validate JSON, parse it with a strict JSON parser (or online validator). If you also need structure guarantees, validate the parsed value against a JSON Schema. BracketView highlights syntax errors as you type and supports schema validation in the workspace.

How to fix invalid JSON

Invalid JSON is usually caused by trailing commas, missing commas between properties, single quotes, comments, or truncated responses. Fix by locating the first parse error, correcting syntax, then re-validating. BracketView can attempt local repair and optional AI repair when local fixes fail.

How to compare JSON files

To compare JSON files, run a structural diff that walks both documents and reports added, removed, and changed paths—not just a line-by-line text diff. BracketView’s JSON Diff tool highlights field-level changes even when key order differs.

Best JSON Viewer

The best free online JSON viewer depends on the job. Use JSONLint to validate and pretty-print, JSON Editor Online for a classic tree-and-code editor, JSONCrack for a graph map of nested data, and BracketView when you want a free browser workspace that combines tree and graph viewing with JSONPath, jq, diff, schema, and an ad-free app. Prefer tools that parse JSON in the browser for sensitive payloads.

JSON formatter vs JSON viewer

A JSON formatter beautifies or minifies text. A JSON viewer presents structure as a tree/graph for navigation. You usually need both: format to read, view to explore. BracketView combines them in one privacy-first workspace.

What is JSONPath?

JSONPath is a query language for selecting and extracting values from JSON documents, similar to how XPath works for XML. Expressions typically start with $ (the root) and use dots, brackets, and wildcards to navigate nested fields.

JSONPath cheatsheet

A JSONPath cheatsheet covers root ($), child access (.key), descendants (..key), wildcards (*), array slices, and filters. Use it to extract nested API fields without writing custom parsers.

What is JQ?

jq is a lightweight, flexible command-line processor for JSON. Filters like .items[] | select(.active) let you slice, map, and transform JSON streams. BracketView embeds a WebAssembly jq playground so you can run filters without installing the CLI.

JQ filter examples

Common jq recipes include mapping fields, selecting with predicates, sorting, and building new objects. Start with `.items[] | select(.active) | {id, name}` and expand as needed.

Webhook debugging guide

To debug webhooks, generate a public catcher URL, point your provider at it, inspect headers and JSON bodies, verify HMAC signatures, then replay to localhost. BracketView Webhook Tester provides disposable endpoints with short retention for this workflow.

API debugging with JSON

Effective API debugging means capturing the raw JSON response, validating syntax, navigating nested fields with a tree/JSONPath, and diffing against a known-good payload. Keep sensitive data local with client-side tools whenever possible.

BracketView vs JSONLint

Use JSONLint when you only need to know whether a string is valid JSON and want it pretty-printed. Use BracketView when you also need a tree viewer, search, JSONPath or jq, diff, or schema tools, and you want viewing to stay in the browser. JSONLint is a linter; BracketView is a workspace.

BracketView vs JSON Editor Online

Choose JSON Editor Online if you want the familiar tree-plus-code-plus-table editor you have used for years. Choose BracketView if you want that tree in a free workspace that also runs JSONPath and jq, diffs two documents, validates schemas, and keeps the app ad-free with client-side core tools.

BracketView vs JSONCrack

Use JSONCrack when you want a graph of nested JSON and that picture is the whole job. Use BracketView when you still need a tree, search, path copy, formatter, and queries after you see the graph. BracketView includes a graph view (JSON Galaxy) inside a broader free workspace; JSONCrack is strongest as a dedicated visualizer.