JSON Validator
Check JSON syntax, identify errors, and format your data. Everything runs locally in your browser.
Runs in your browser
What is a JSON Validator?
A JSON Validator checks whether JSON text follows the JavaScript Object Notation syntax rules. It helps you find invalid strings, missing commas, mismatched brackets, and other syntax errors.
How to validate JSON
Paste JSON into the editor and select Validate JSON. If the input is valid, you will see a success message. Otherwise, the validator displays the parsing error so you can correct the JSON.
Common JSON syntax errors
Common mistakes include trailing commas, single-quoted property names, missing quotation marks, unescaped characters, and incorrectly nested objects or arrays. JSON requires double-quoted property names and strings.