JSON Validator
Check JSON for syntax errors, live as you type, with the parser's exact error message.
Expected double-quoted property name in JSON at position 40 (line 4 column 1)
Validates live as you type using your browser's own JSON parser, showing its exact error message (including the character position) when something's wrong. Runs entirely in your browser; nothing you type is sent anywhere.
What is JSON Validator?
Paste JSON and see instantly whether it's valid, using your browser's own JSON parser — if it's not, you get the parser's exact error message (including where in the text it went wrong), not a generic "invalid JSON."
FAQ
No — this checks that the text is syntactically valid JSON, not that it matches a particular schema/shape. Schema validation is a separate, more involved task.
No, validation runs entirely in your browser using JSON.parse().