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JSON Formatter

Format, validate and minify JSON locally. Choose two or four spaces while preserving number spelling and key order.

Your browser. Your workspace.
Ready when you are

A little less busywork. A little more time for what matters.

About JSON Formatter

Turn a dense block of JSON into something you can read. Check its syntax, add clear indentation, or make it compact again.

How to use it

  1. Paste JSON into the input, or load the sample.
  2. Choose Format & validate or Minify & validate. For formatting, select two or four spaces.
  3. Run the tool, review any validation error, then copy or download the JSON result.

Good to know

  • The formatter preserves original number spelling, key order and duplicate keys. It does not validate a JSON Schema.
  • Comments and trailing commas are not valid JSON. A syntactically valid document can still contain incorrect data.

Your tool input is processed in this browser and is not uploaded by the application. JavaScript is required to run the tool.

The small print, plainly

A note on privacy.

Tool inputs and files are processed in your browser. This app does not upload the content you enter or the files you open.

The website host can receive ordinary request information, such as your IP address and browser details, when you load the site. No analytics have been added to this app.

Only your favorite tool IDs are saved in local storage on this browser. You can remove favorites by un-starring them or clearing this site’s browser data.

Clearing an input removes it from the tool. It does not clear your clipboard or delete files you have downloaded.

Simple tools, thoughtfully made.