The tab character ( U+0009), carriage return ( U+000D), line feed ( U+000A), and space ( U+0020) characters are the only valid whitespace characters. Insignificant whitespace may be present anywhere except within a JSONNumber (numbers must contain no whitespace) or JSONString (where it is interpreted as the corresponding character in the string, or would cause an error). If you paste a copied text to the Text mode, the JSON is automatically parsed, but you can also manually switch between the two modes. There are two viewing modes: Text and Tree. For searching the entire JSON, the tree must be expanded first. In addition, this JSON formatter tool is accessible to users around the worl d. Unescaped = %x20-21 / %x23-5B / %x5D-10FFFF Only visible part of the JSON tree would be searched. This free online JSON formatter tool is compatible with all modern web browsers, such as Chrome, Firefox, Safari, and Edge, as well as all computer operating systems, such as Windows, Mac OS X, and Linux, amongst others. String = quotation-mark *char quotation-mark Object = begin-object Īrray = begin-array end-array Value = false / null / true / object / array / number / string Valid JSON syntax is formally defined by the following grammar, expressed in ABNF, and copied from IETF JSON standard (RFC): JSON-text = object / arrayīegin-array = ws %x5B ws [ left square bracketīegin-object = ws %x7B ws right curly bracket Published under licence by IOP Publishing. A Rahmatulloh1, R Gunawan1 and F M S Nursuwars1. For more information, see Object literal syntax vs. Performance comparison of signed algorithms on JSON Web Token. The same text may represent different values in JavaScript object literals vs. For those who wish to use a more human-friendly configuration format based on JSON, there is JSON5, used by the Babel compiler, and the more commonly used YAML. Other differences include allowing only double-quoted strings and no support for undefined or comments. Benchmarks that compare at least two implementations supporting draft-06+ may be. Before the revision, U+2028 LINE SEPARATOR and U+2029 PARAGRAPH SEPARATOR are allowed in string literals and property keys in JSON but the same use in JavaScript string literals is a Synta圎rror. Code generation Web UI generation Data from schemas. NaN and Infinity are unsupported.Īny JSON text is a valid JavaScript expression, but only after the JSON superset revision. A decimal point must be followed by at least one digit. Property names must be double-quoted strings trailing commas are forbidden. It is based upon JavaScript syntax, but is distinct from JavaScript: most of JavaScript is not JSON. JSON is a syntax for serializing objects, arrays, numbers, strings, booleans, and null.
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