Check and validate JSON syntax online for free. Quickly find whether your JSON is valid or contains an error.
HoxTools JSON Validator is a free online tool for checking whether JSON data follows valid JSON syntax. Paste your JSON into the tool and validate it instantly in your browser.
JSON validation is useful when working with APIs, websites, software applications, configuration files and structured data. Finding syntax errors before using JSON can help avoid problems in applications and data processing.
A JSON validator checks JSON text by attempting to parse it according to the JSON syntax rules. If the JSON can be parsed successfully, it is reported as valid. If parsing fails, the tool displays an error message.
Invalid JSON can cause parsing errors when it is used by applications, APIs and other software. Validation can help identify syntax problems before the data is used.
This can be particularly helpful when JSON has been edited manually, copied from another application, or generated during development and testing.
JSON objects and arrays require commas between appropriate values. A missing comma can make the JSON invalid.
JSON strings use double quotation marks. Incorrect or missing quotation marks can cause parsing errors.
JSON objects use curly braces and arrays use square brackets. Missing or incorrectly placed brackets can make JSON invalid.
JSON supports specific value types such as strings, numbers, objects, arrays, true, false and null. Unsupported values can result in invalid JSON.
The tool can be useful for web developers, software developers, students, API testers, programmers and anyone working with JSON data.
You can use it while developing applications, testing API responses, checking configuration data or troubleshooting JSON syntax problems.
Paste your JSON into the input box and click Format JSON. If the JSON is valid, the tool will format it with indentation and line breaks to make the structure easier to read.
Yes. After entering or formatting your JSON, click the Copy button to copy the JSON to your clipboard.
Yes. HoxTools provides this JSON validator free online. You do not need to install additional software to use it.
No. JSON validation and formatting are performed directly in your browser. The tool does not send your JSON to the HoxTools server for processing.
Paste your JSON into the input box and click Validate JSON. The tool checks the JSON syntax directly in your browser.
After validation, the tool displays a success message when the JSON syntax is valid. If parsing fails, it displays an invalid JSON message and available error details.
Yes. The validator uses your browser's JSON parser and displays the parsing error reported by the browser when invalid JSON is detected.
Yes. Click Format JSON to format valid JSON with indentation and line breaks.
You may also find these HoxTools useful: