JSON Formatter
Format, minify, and validate JSON in your browser.
Paste the JSON you want to process into the input textarea.
Click Format to add 2-space indentation, Minify to remove all unnecessary whitespace, or Validate to check syntax only.
If the JSON is invalid, the exact parser error message appears below the input, including the character position, so you can fix it quickly.
Frequently asked questions
Does this send my JSON to a server?
No. Parsing and formatting happen entirely in your browser with the native JSON object.
What is minification?
Minification removes whitespace and line breaks to reduce file size, which is useful for API payloads and production assets.
Why does validation show a position?
JSON.parse reports the character index where it fails. That position points to the location of the syntax error in your input.