What this tool is for
JSON Validator gives a quick pass/fail check for payloads before they go into an API client, config file, or issue report.
When to use it
Use it when a tool says JSON is malformed and you want the browser parser's exact complaint.
What the result means
The result reports valid JSON and identifies the top-level type, or shows the parse error message.
Use notes
- Paste the exact payload you want to test.
- Trailing commas and comments are not valid JSON.
- For schema rules, use a dedicated JSON Schema validator.
Privacy and limits
Everything runs in your browser tab. Avoid pasting production secrets, private tokens, customer data, or proprietary code into any online page unless your team policy allows it.