JSON Formatter & Validator
Paste any JSON and this tool instantly formats it with clean indentation, or flags exactly where it breaks. A JSON formatter turns a dense, single-line blob into a readable, indented structure so you can scan nested objects and arrays at a glance. Essential when debugging API responses or config files. It also works as a validator: if your JSON has a stray comma, unquoted key or missing bracket, you get a clear error instead of a silent failure. Everything runs locally in your browser, so even sensitive payloads never touch a server. Use the buttons to beautify with 2-space indent, minify to a compact single line, or validate without changing anything.
How to use JSON Formatter & Validator
- Paste your JSON into the input box.
- Click Beautify to indent it or Minify to compress it.
- Read any validation error if the JSON is malformed.
- Copy the formatted output.
Frequently asked questions
What is the difference between beautify and minify?
Beautify adds consistent indentation and line breaks so the JSON is easy to read, while minify strips all whitespace to make the smallest possible payload. Both keep the same data.
Does it tell me where my JSON is invalid?
Yes. The validator reports a parse error with the location so you can find the missing comma, unquoted key or stray bracket that breaks the structure.
Will it change my numbers or key order?
It preserves your values and key order and only reformats whitespace, so beautifying and then minifying returns the same logical data.
What is JSON Formatter & Validator?
Paste any JSON and this tool instantly formats it with clean indentation, or flags exactly where it breaks. A JSON formatter turns a dense, single-line blob into a readable, indented structure so you can scan nested objects and arrays at a glance.
Is JSON Formatter & Validator free to use?
Yes. JSON Formatter & Validator is completely free, with no sign-up and no usage limits.
Does JSON Formatter & Validator work in a web browser?
Yes. JSON Formatter & Validator runs in any modern web browser. There is nothing to download or install.
Is my data private with JSON Formatter & Validator?
Yes. JSON Formatter & Validator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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