JSON Validator

Paste your JSON into the input box and press Validate. A green message means the text is valid JSON. A red message tells you the line, the column and what the parser expected, and the offending character is selected in the input box so you can fix it straight away.

Valid JSON has one top-level value (an object, array, string, number, true, false or null), double-quoted strings and keys, no trailing commas and no comments. The parser here follows the standard strictly, so it will reject things that some tools quietly accept, such as single quotes.

Validation runs in your browser and your data is never uploaded.