JSON Validator
Validate JSON and surface parse errors in your browser.
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Tool workspace
Validates JSON locally in your browser. Paste is never sent to our servers.
How it works
Paste JSON and Validate. On success you see Valid JSON plus the top-level type (object, array, string, number, boolean, or null).
Empty input clears the result—no error. Invalid JSON shows a parse error. Validation shares the same browser-side parser as JSON Formatter.
Empty input clears the result—no error. Invalid JSON shows a parse error. Validation shares the same browser-side parser as JSON Formatter.
Examples
- {"ok":true} → Valid JSON (object).
- [1,2 → Invalid JSON with a parse message
Privacy
Privacy: this tool processes JSON locally in your browser. We do not log or store what you paste. Login is not required.
FAQ
Is my JSON uploaded?
No. Validation runs entirely in your browser.
Do I need an account?
No. All published tools work for guests without login.