JSON5 Formatter & Validator

Free online JSON5 formatter and validator. Format, beautify, and convert JSON5 to JSON instantly with syntax highlighting. Privacy-first, client-side processing. No server uploads.

What is a JSON5 Formatter?

A JSON5 formatter is a tool that beautifies and formats JSON5 data to make it more readable. JSON5 extends JSON to include comments, trailing commas, and more human-friendly syntax while maintaining compatibility with JSON.

Features

  • Format and beautify JSON5 with customizable indentation
  • Minify JSON5 to remove all whitespace
  • Validate JSON5 syntax with detailed error messages
  • Convert JSON5 to standard JSON
  • Sort JSON5 keys alphabetically
  • Syntax highlighting for better readability
  • Privacy-first: All processing in your browser
  • Free forever with no limitations

How to Use the JSON5 Formatter

  1. Paste your JSON5 data into the input editor
  2. Click "Format" to beautify your JSON5
  3. Use "Minify" to compress JSON5 by removing whitespace
  4. Click "Validate" to check for syntax errors
  5. Use "Convert to JSON" to convert JSON5 to standard JSON
  6. Use "Sort Keys" to alphabetically order JSON5 properties
  7. Copy the formatted output with one click

What is JSON5?

JSON5 is an extension of JSON that makes it easier for humans to write and maintain. It supports comments, trailing commas, unquoted keys, single quotes, and more. Our formatter helps you work with JSON5 files while maintaining the ability to convert back to standard JSON when needed.

JSON5 Formatter & Validator

SP
Input
Output

Flexible Formatting

Beautify JSON5 with support for comments, trailing commas, and relaxed syntax.

Smart Parsing

Understands modern JSON5 features and formats them into clean, standard output.

Syntax Validation

Validates JSON5 with detailed error reporting for safer configuration files.

Fast Processing

Processes large JSON5 files instantly using in-browser parsing.

Quick Export

Convert JSON5 to standard JSON or copy formatted output in one click.