Developer · free local utility
Beautify difficult-to-read JSON, reduce it to one line, or confirm that a payload parses before sharing or using it.
Paste JSON, choose an indentation size, then format, minify, or validate it.
This validates JSON syntax only. It does not validate a JSON Schema, API contract, field type, or business rule.
Always verify the result in the system where you will use it. The page intentionally avoids accounts, uploads, and claims that go beyond the calculation it performs.
No. Standard JSON does not allow comments or trailing commas, so they produce a parse error.
The payload is parsed and serialized as JSON. Whitespace changes, while valid JSON values and key order are generally retained by the browser parser.
Local processing reduces exposure, but the safest choice is to remove tokens, credentials, and personal data before pasting content anywhere.