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JSON Validator
Runs in your browserInput
Output
Ready — zero server calls
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How to Use
- Paste your JSON into the input field.
- See instant validation: green for valid, red for errors with exact line and column.
- For valid JSON, view structure stats including key count, depth, and size.
Validate JSON Online
Paste JSON and instantly see if it's valid. Unlike simple validators that just say "invalid", this tool shows exactly where the error is â line number, column number, and a context snippet with a pointer to the problem.
JSON Structure Stats
For valid JSON, the tool shows useful stats: document type, top-level key count, total keys, maximum nesting depth, and counts of each value type (strings, numbers, booleans, arrays, objects, nulls).