About JSON Formatter & Validator
Minified JSON from an API response is almost unreadable, and a single misplaced comma or bracket will break parsing. This formatter validates your JSON, reports the location of syntax errors, and pretty-prints valid input with consistent indentation.
How to use
- Paste your JSON into the input area.
- Format it to add indentation, or minify to strip whitespace.
- Fix any reported syntax errors and re-run.
Frequently asked questions
Why is my JSON invalid?
The usual causes are trailing commas, single quotes instead of double quotes, unquoted keys, or comments. JSON permits none of these, even though JavaScript object literals do.
Is my data sent to a server?
No. Parsing and formatting run entirely in your browser, so sensitive payloads never leave your machine.