Category: Developer tools
JSON Formatter
Format, minify and validate JSON in your browser
Paste JSON to pretty-print it with 2-space indentation, minify it to one line, or check it for syntax errors. Nothing is uploaded.
Ready
The result will appear here.
Everything on this page is processed in your browser. Nothing is uploaded.
What this tool does
A JSON formatter turns compact or badly indented JSON into a readable, indented structure so you can scan keys and nesting quickly. This one also minifies JSON back to a single line for use in configuration values, and reports the exact parser message when the syntax is broken.
How to use it
- Paste or type your JSON into the input box.
- Choose Format for readable output, Minify for one line, or Validate to check syntax only.
- Copy the result with the copy button.
Privacy
This tool runs entirely in your browser. Your input is never uploaded, stored or shared — closing the tab removes it.
Frequently asked questions
- Is my JSON sent anywhere?
- No. The text is parsed by your browser's built-in JSON engine, so it never leaves the page.
- Why does it say invalid JSON?
- The message under the input is the exact parser error. Trailing commas, single quotes and unquoted keys are the most common causes.