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JSON Formatter

Format, validate, and minify JSON with one click.

Input JSON0 chars
Output
Formatted JSON will appear here

What does this tool do?

JSON (JavaScript Object Notation) is the standard format for exchanging data between apps, APIs, and servers. Raw JSON from an API response is often minified — all on one line with no spaces — making it nearly impossible to read or debug. The JSON Formatter solves this instantly: paste your JSON and either beautify it (add indentation and line breaks so you can read it) or minify it (strip all whitespace to reduce file size before sending it). It also validates that your JSON is correctly structured and points out exactly where errors are.

How to use it

  1. Paste your raw JSON into the input box.
  2. Click Beautify to add readable indentation, or Minify to compress it.
  3. If your JSON has a syntax error the tool will show you exactly where.
  4. Click Copy to grab the formatted result and paste it wherever you need it.

Pro tips

  • If you see a parse error, look for missing commas, unmatched brackets, or property names without quotes.
  • Minified JSON is typically 10–30% smaller — worth doing when optimising high-traffic API endpoints.
Example

You paste this from an API response: {"name":"Alice","age":30,"city":"London","active":true}

Beautify outputs:
{
  "name": "Alice",
  "age": 30,
  "city": "London",
  "active": true
}

When would you use this?

  • Debugging an API response that arrives as one unreadable line of text
  • Sharing a config file with a teammate in a format they can read
  • Checking whether a webhook payload is valid before writing code to handle it
  • Reducing JSON payload size before sending it over the network