What does it do?
Validate JSON syntax and display a formatted result.
JSON Validator is a free developer tool that runs directly in your browser. Your data is processed locally and is never sent to the DevMiniTools server.
Practical use cases
Use it whenever you need to format, convert, inspect, or generate developer data quickly.
How to use it
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1
Enter the value you want to process in JSON Validator.
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2
Choose any required options and click Run or Generate.
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3
Review the output, then copy it or clear the fields when needed.
Frequently asked questions
Yes. The tool is free to use and does not require registration.
No. Processing happens locally in your browser and your input is not uploaded.
Use the Copy result button after the tool finishes processing.
JSON Validator
Use the tool now
Use the tool now
Validate JSON syntax and display a formatted result.