Verify that your JSON strings strictly conform to RFC 8259 with instant error pointing and syntax breakdown locally.
Paste the JSON data you want to test.
Click "Validate JSON" to run the local parser.
See immediate valid confirmation or detailed error coordinates and guidance.
Provides specific error messages and pinpoint coordinates where syntax failed.
Tests against standard JSON requirements including quoted keys and proper types.
Displays root type (Object/Array), total keys, and nesting depth.
Invalid JSON strings break web APIs, mobile apps, and database migrations. Our JSON Validator parses your JSON locally, confirms compliance with RFC 8259, and pinpoints the exact line, column, and token where syntax errors occurred (such as missing quotes, trailing commas, or unescaped characters).
The most common errors are trailing commas after the last array/object item, single quotes instead of double quotes, and missing closing brackets.
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