foldmintReadable JSON without silent number rounding
The tool validates syntax, then formats the original tokens. Minify removes whitespace outside strings. Strings, key order, duplicate keys and number tokens remain as written. For example, 9007199254740993 stays that exact token rather than being rounded through a JavaScript number.
What validation means
Valid syntax does not guarantee valid application data. This is not a JSON Schema validator or an API contract checker. Duplicate keys are retained but remain risky because another parser may keep only the last value. Comments, trailing commas, single-quoted strings and JavaScript expressions are rejected.
Format a nested API response to see its structure, then compare its fields with the API documentation. The tool does not sort keys, execute code or fetch remote references.
Input is limited to 200,000 characters. Readable formatting supports at most 200 nesting levels. Long output scrolls within its preview. Avoid exposing secrets in shared screenshots and downloads, even though formatting does not upload the input.
Processing and sources
Inputs are processed on your device, without uploading or saving them to browser storage. Reset clears the result; downloaded files remain on your device. Website requests and permitted advertising or measurement are separate. See our privacy policy.
Technical reference: JSON.parse.
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Word counter, JSON formatter, URL encoder and Base64 text converter.