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Tools

JSON Formatter

Validate JSON, prettify it with indentation, or minify it to a single line.

Format and Validate JSON

Input on the left, output on the right.

Input JSON
Output

Guide

Use this JSON formatter to validate, prettify, or minify JSON while keeping your data in the browser. It helps when you are debugging APIs, config files, or logs.

Common use cases

  • Quickly spot missing commas, quotes, or braces.
  • Make a large JSON response readable with indentation.
  • Minify JSON to reduce payload size when needed.

Tip

If you paste sensitive data (tokens, passwords, customer info), clear the input after you finish. This tool runs locally, but your clipboard and browser history are still yours to manage.

Learn JSON in JavaScript