Format, minify, and validate JSON data. Free online JSON formatter tool for developers.
A free online JSON formatter, validator, and minifier. Paste messy JSON to beautify it with clean indentation, collapse it to a single minified line, or validate it to catch syntax errors — all instantly in your browser.
Your data never leaves your device, so it's safe to format sensitive API responses and config files. Developers use it every day to read, debug, and clean up JSON quickly.
Beautify JSON with readable indentation
Minify JSON to the smallest single-line form
Validate JSON and pinpoint syntax errors
Copy formatted output to your clipboard
Private — JSON is processed in your browser only
Free, fast, and no sign-up
Drop your raw or minified JSON into the input box.
Click Format to beautify, Minify to compact, or Validate to check for errors.
Copy the clean output and use it in your code, docs, or API tooling.
Beautify raw API responses to read nested structures and spot issues fast.
Format and validate JSON config before committing it to your project.
Minify JSON to trim whitespace for smaller requests and responses.
See how objects and arrays nest with clear, indented formatting.
It adds consistent indentation and line breaks so nested objects and arrays are easy to read, without changing the data itself.
The tool parses your JSON and reports whether it's valid. If there's a syntax error — like a missing comma or bracket — it lets you know so you can fix it.
Yes. All formatting, minifying, and validating happen in your browser. Your data is never uploaded, so it's safe for sensitive content.
Format expands JSON with indentation for readability; minify removes all unnecessary whitespace to make the file as small as possible.