JSON Formatter
Format, parse, validate, and minify raw JSON payloads instantly.
About the JSON Formatter
The JSON formatter turns compact or messy JSON into a clean, indented structure that is easy to read and debug. Paste any JSON payload, such as an API response, a configuration file or a log entry, and the tool validates it, reports syntax errors with their position, and pretty-prints it with consistent indentation. You can also minify formatted JSON back into a single line to save bandwidth or fit it into a request.
How to use the JSON Formatter
- Paste your JSON into the input area.
- Click Format to beautify it, or Minify to compress it.
- If the JSON is invalid, read the error message to locate the problem, such as a trailing comma or unquoted key.
- Copy the result to the clipboard with one click.
Frequently asked questions
Why does my JSON fail validation?
Common causes are single quotes instead of double quotes, trailing commas, comments, or unquoted property names. JSON is stricter than JavaScript object syntax.
Is there a size limit?
The formatter runs in your browser, so very large documents (tens of megabytes) may be slow, but typical API responses format instantly.
Is my data sent to a server?
No. Parsing and formatting happen entirely on your device, which makes it safe for sensitive payloads.