JSON Validator
Validate JSON & see errors.
Check whether text follows JSON syntax and read the parser’s error message when it does not. Useful before saving a configuration file or sending a JSON request.
How to use JSON Validator
Enter your text
Paste content into the “JSON to validate” field.
Set the options
Choose the available options. The result updates as you type.
Review the result
Check the “Validation result” area before copying or downloading any output.
What to check
Common questions
Is JSON Validator free?
Yes. There is no account requirement or payment step to use this tool.
Where is my input processed?
Inside your browser. This tool does not submit your input to a processing server. The hosting service still receives normal requests to load the website and its assets.
Will this work on my phone?
It is designed for current browsers on phones and computers. Available memory, file size, browser format support, and the tool’s controls determine what your device can process.