JSON File Validator

JSON File Validator: Validate a local JSON file and download a nicely formatted copy without uploading it.

JSON File Validator

JSON File Validator: Choose a JSON file no larger than 4 MB and validate it in the browser. Inspect its top-level type and formatted preview; download the fully formatted JSON if it parses successfully.

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How to use JSON File Validator

Choose a JSON file no larger than 4 MB and validate it in the browser. Inspect its top-level type and formatted preview; download the fully formatted JSON if it parses successfully.

Example

A JSON file containing {"hello":true} is reported as an object containing one top-level key.

What to know

JSON syntax must be valid. Duplicate object keys can be collapsed by the parser, and formatting can change whitespace. Always keep the original file for reference.