Ready.
Developer utility
JSON Formatter and Validator
Paste JSON to make it readable, minify it for compact storage, or quickly check whether a response body, configuration file, or API example is valid JSON.
Useful for API work
Readable JSON makes it easier to inspect nested objects, arrays, status flags, IDs, and error messages while debugging integrations.
Minified output
Minified JSON removes whitespace without changing data. It is handy when storing small configuration snippets or comparing payloads.
Validation limit
This page validates syntax only. It does not validate a business schema such as required fields, allowed enum values, or API-specific rules.
JSON FAQ
Why does valid JavaScript object syntax fail?
JSON is stricter than JavaScript object literals. Keys must use double quotes, and values cannot include functions, comments, undefined, or trailing commas.
Does formatting change the data?
No. Formatting changes whitespace only. Minifying also changes whitespace only, as long as the input parses successfully.
Can this handle large files?
It can handle many everyday snippets, but very large files may slow the browser. For huge logs or exports, use a local editor or command-line JSON tool.