JSON Formatter

Free online JSON Formatter: paste your JSON and get beautifully formatted output with line numbers. Powered by React and CodeMirror.

Features

  • Instant JSON formatting and validation
  • Side-by-side editor panes with line numbers
  • No installation or sign-up required
  • Copy formatted JSON with a single click
  • Syntax highlighting for better readability
  • Real-time error detection

How to Use

  1. 1Enter or paste raw JSON in the upper editor
  2. 2View formatted JSON with proper indentation on the bottom
  3. 3Click the copy button to copy the beautified JSON
  4. 4Use the clear button to reset the editor

About JSON Formatting

JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write and easy for machines to parse and generate. Properly formatted JSON is essential for:

  • Improved code readability
  • Easier debugging
  • Better version control diffs
  • Consistent code style across teams

Our JSON formatter uses Prettier under the hood to ensure consistent and beautiful formatting according to industry standards.

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