Developer Tools
JSON Validator
Validate JSON syntax quickly with clear error reporting and safe, client-side checks.
Valid JSON
No
Detected type
invalid
Input bytes
0
Validation message
Please provide JSON text before validation.
What this tool does
Use this checker to detect malformed JSON before sending payloads to APIs or saving config files.
How to use it
- Paste your JSON payload.
- Review the validation status and detected type.
- Correct any syntax issues shown in the message and re-check.
Privacy note
Validation happens in the browser; nothing is uploaded to ClearUtils.
FAQ
Does this send JSON to a server?
No, validation happens locally in your browser.
Can I validate large JSON files?
Large inputs are accepted up to a safe length limit for browser stability.