Online JSON Viewer,Validator | JSON Lint


Paste The JSON Text or drag here:


This is a validator and reformatter for JSON, a lightweight data-interchange format. Copy and paste, directly type, or input a URL in the editor above and let tidy and validate a JSON code.


JSON data types
- String: Text string. The string must be entered into quotation marks (apostrophes are not allowed) and can contain all Unicode characters. Quotation marks and backslash must be entered in the form \" and \\. Any character (similar as in JavaScript) can be entered also in the form uXXXX, where XXXX represents the character code from Unicode table written in hexadecimal form. Example: "Temperature", "Name is \"PROMOTIC\""
- Number: Number, integer or real number (including the syntax with exponent). The decimal separator is always a period. Example: 1316, -1.23, 0.12e-4
- Boolean: Logical value. Example: true, false
- Null: Value null (not set). Example: null
- Array: Array (list of values). It is demarked by square brackets []. Array in JSON is a container with sequenced list of values. The values in array can be of any JSON data type including an object or an array. Example: [12, "Beethoven", 33.6, false] [0.2, ["Mozart", "Wolfgang, "Amadeus", 1756], "Salzburg", 35.8, false]
- Object: Object (name-value pairs). It is demarked by braces {}. Object in JSON is not an object in the sense we know from JavaScript. It is a container with data but no methods. Each data item (value) of the object has its key that is of the String type. Other objects and arrays can be inserted into such object thus creating more complex tructures. Example: {"x": 100, "y": 100} {"position": {"x": 100, "y": 100}, "size": {"dx": 200, "dy": 100}}

Values of other data types cannot be entered directly and must be transformed to some of the JSON types. For example the date can be transformed into string or number in order to enter it to JSON.
JSON itself is built on two universal structures: - Collection of name-value pairs (Object) - in the PROMOTIC system represented by the PmMap object. - Sorted list of values (Array) - in the PROMOTIC system represented by the PmArray object.
Different Results
If you use a Windows computer you may end up with different results. This is possibly due to the way Windows handles newlines. Essentially, if you have just newline characters (\n) in your JSON and paste it into JSONLint from a Windows computer, it may validate it as valid erroneously since Windows may need a carriage return (\r) as well to detect newlines properly. As a solution, either use direct URL input, or make sure your content's newlines match the architecture your system expects!