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Online JSON Syntax Validator

Verify if your JSON data is valid and instantly identify the exact line and position of any syntax mistakes.

Paste JSON to validate syntax
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How to Use JSON Validator

1

Paste JSON

Enter the JSON data you want to test.

2

Click Validate

Instantly check syntax validity.

3

Inspect Errors or Output

Review validation status and structured tree output.

Key Features & Benefits

Instant validation status badge (Valid / Invalid)

Human-readable error details with line and character pointers

Formatted syntax tree view on valid JSON

Fast browser-local evaluation

Frequently Asked Questions

What common JSON errors does it catch?

It catches trailing commas, unquoted keys, single quotes instead of double quotes, mismatched brackets, and unescaped characters.

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