What is a .JSON file?
JSON is a lightweight, human-readable data-interchange format.
- Did you know
- JSON was specified and popularised by Douglas Crockford in the early 2000s.
- JSON was drawn from a subset of JavaScript’s syntax, but it is now a language-independent data format.
- It is defined by two parallel specifications, ECMA-404 and IETF RFC 8259, which keep the same grammar.
- A .JSON file is plain text, so you can open and edit it in any text editor.
- On the web a .JSON file is served with the MIME type
application/json.
- What Analyser shows you
- Preview and inspect HTML, CSS, JavaScript, TypeScript, JSON, YAML, XML and Markdown source files, plus Windows scripts. TypeScript (TS, MTS, and .d.ts declaration files) gets a structure readout beside the source: the modules it imports (packages against local files, and which are type-only), the names it exports, what it declares - interfaces, type aliases, enums, classes, functions - a code/comment/blank line breakdown, and how often it steps around the type system with any, as casts, non-null assertions and @ts- suppressions. PowerShell (PS1, PSM1, PSD1) is read for its comment-based help synopsis, #Requires directives, function and parameter counts, CmdletBinding and Authenticode signing; batch/command scripts (BAT, CMD) for the echo state, labels, variables set and the external tools they invoke.
- Open a .JSON file
- Drag a .JSON file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.