JSON Validator
Check whether your text is valid JSON.
Your input is processed in this browser. This tool does not upload, save, or log your text.
Developer tools that just work
5 free tools to format, validate and encode data in your browser.
JSON tools
How to use JSON Validator
- Enter your text or choose Load example.
- Select Process to validate and run the tool.
- Review the result, then copy or download it.
What this tool does
Check JSON syntax before using data in an application. Objects, arrays, strings, numbers, booleans, and null are valid JSON values.
Supported files, limits & important details
Checks syntax only, not a business schema, duplicate keys, or data accuracy.
Input limits are enforced before processing. Clear removes your input and result from this page. This tool does not store your input between visits.
Keep your workflow moving
Questions about JSON Validator
How do I use JSON Validator?
Enter your text or choose Load example. Select Process to validate and run the tool. Review the result, then copy or download it.
Are files or text uploaded when I use JSON Validator?
No. JSON Validator processes your input in your browser. The tool does not upload your document or text for processing. Keep your original and review the result.
What should I check before relying on JSON Validator?
Check JSON syntax before using data in an application. Objects, arrays, strings, numbers, booleans, and null are valid JSON values.
Need help choosing a workflow? Read our practical PDF and file guides. How your data is handled.