Blog & JSON Tutorials
Complete guides, hands-on tutorials, and JSON documentation for developers from beginner to advanced.
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The most comprehensive JSON guides and tutorials
What is JSON? A Complete Beginner's Guide
JSON (JavaScript Object Notation) is a lightweight data-interchange format that's easy for humans to read and for machines to parse. Learn the syntax, data types, and structure that power modern APIs.
The History of JSON: From 2000 to Industry Standard
Trace JSON from Douglas Crockford's idea in 2001, through Yahoo's adoption, to becoming the ECMA-404 standard that powers 90% of modern APIs.
The Complete JSON Schema Guide (Draft 7)
JSON Schema is the standard for describing and validating JSON structure. Learn the core keywords, build a real API schema, and apply best practices.
JSON Examples in 7 Languages (With Code)
Production-ready JSON parsing and serialization examples across seven languages — with error handling and best practices.
Every JSONForge Tool, Explained
A tour of all the JSON tools in the toolkit — what each one does, when to reach for it, and how they fit together. Format, validate, repair, convert, and explore JSON, all in your browser.
The JSONForge Browser Extension
Format, validate, and explore JSON on any web page without leaving your tab. A guide to what the JSONForge browser extension does, how to install it, and when it beats the website.
JSON vs XML vs YAML: Choosing the Right Data Format
JSON, XML, and YAML all represent the same structured data in different shapes, with different trade-offs around verbosity, comments, and parsing. A practical comparison of when each one actually wins.
Common JSON Parsing Errors and How to Fix Them
JSON.parse() is unforgiving — one stray comma or unescaped character anywhere in the document throws the whole thing out. A field guide to the most common JSON parsing errors, what V8's error messages actually mean, and when to fix by hand vs. reach for a repair tool.
REST API JSON Design: Best Practices
The JSON shape of a REST API is a contract every client depends on. A practical guide to envelope design, pagination, null vs. omitted fields, error shapes, naming conventions, and the anti-patterns that make APIs painful to consume.
Working with Nested JSON: Flattening, Querying, and Transforming Data
Deeply nested JSON is natural for programs and painful for spreadsheets and SQL. A practical guide to flattening nested objects into flat key/value maps, deciding when to flatten vs. keep nesting, and querying nested values with dot-path notation.
JSON Minification vs. Prettification: When to Use Each
Minified JSON saves bytes; prettified JSON saves your eyes. A practical guide to when whitespace matters, when it doesn't, and how much you actually save by stripping it.
Generating TypeScript Types from JSON: A Practical Guide
Stop hand-writing interfaces for API responses. Learn how JSON-to-TypeScript inference works, where it gets ambiguous (optional fields, unions, dates), and how to review generated types before trusting them.
How to Diff and Compare JSON Documents
A line-by-line text diff on JSON is nearly useless — reordering two keys looks like a rewrite. Here's how structural JSON diffing actually works, and where it's used: API regression testing, config drift, and audit trails.
JSON Security: Common Vulnerabilities and How to Avoid Them
JSON.parse() is safe, but what you do with the result often isn't. A look at prototype pollution, unsafe merges, and why validating untrusted JSON against a schema before trusting it matters.