JSON, Explained
Plain-English guides to the JSON format — what it is, and why it is so strict about quotes, commas and brackets. No jargon, no sign-up.
What Is JSON? The Data Format, Explained Simply
The format almost every app and API uses to move data around — objects, arrays, strings and numbers — explained from scratch with examples you can paste into the formatter.
Read ConceptWhy JSON Needs a Strict Format (and What Breaks Without One)
Double quotes, no trailing commas, no comments — the rules feel fussy until you see what they buy you: a format any language can parse the same way, every time.
Read PrivacyAre Online JSON Formatters Safe? How to Tell If Your Data Is Uploaded
Some online tools upload everything you paste; others run entirely in your browser. Four quick checks to tell them apart before you paste API keys, tokens or personal data.
ReadJSON (JavaScript Object Notation) is the plain-text format most APIs, config files and browser storage use to represent structured data as objects, arrays, strings, numbers, booleans and null. It reads a lot like a JavaScript object literal, but the two are not the same thing — JSON is stricter: keys and strings must use double quotes, trailing commas are not allowed, and the spec has no place for comments. The articles above walk through what the format actually is, why that strictness exists and what it protects you from, and how to tell whether a website's "online JSON formatter" is running in your browser or quietly uploading whatever you paste into it. Each one links back to this formatter so you can try the examples immediately.