JavaScript Object Notation, a lightweight structured data format.
Text starting with '{' or '[' followed by a quoted key or nested bracket.
JSON is the de-facto data-interchange format for web APIs and config, valued for being both human-readable and trivial to parse. It has no magic number — it is recognized structurally by a leading '{' or '[' followed by valid content.
Have a file that might be JSON? Identify it with the File Type Identifier — it reads the magic number locally, nothing is uploaded. Or browse all formats.