JSON Validator
Check JSON syntax and report where parsing fails.
Use JSON Validator
How to use this tool
- Paste the JSON document into the input field.
- Select Run tool to check whether the browser can parse it.
- If an error appears, correct the input and run the check again.
Syntax checks and application checks
A syntax check answers whether the input is valid JSON. It does not tell you whether an email address is correct, whether a required field exists or whether your API will accept a value. Those checks require a schema or application validation. Standard JSON uses double quotes and does not allow comments or trailing commas.
Example
{"ready":true} is valid JSON. {ready:true} is not, because the property name is not enclosed in double quotes.
Questions about this tool
Does Valid JSON mean the data is safe to use?
It means the text parsed successfully. Validate its structure, permissions and meaning in the application that will use it.
Should I paste production credentials here?
Use a redacted sample when troubleshooting. Do not put production credentials or private customer data in examples you share.
Related tasks
About JSON Validator
Check JSON syntax and report where parsing fails with a focused online interface designed to help you complete this task quickly on Costovia.
How to use JSON Validator
- Paste or enter the data, code or token requested by the tool.
- Choose any available formatting, validation or conversion option.
- Review the output and test it in your own development environment before production use.
Example
Example: use a sample input first to confirm that JSON Validator produces the format or result you expect before processing important content.
What to check
Developer output is intended for inspection and convenience; validate it in your own application before production use.
Frequently asked questions
What does JSON Validator do?
Check JSON syntax and report where parsing fails.
How do I use the JSON validator?
Enter the values, text or files requested by JSON Validator, choose any relevant options, run the tool, and review the result before copying or downloading it.
Can I use the output directly in production?
Treat the output as a convenience result and validate it in your own application or development workflow before production use.