JSON5 Formatter Online

Format JSON5 in browser with support for comments, trailing commas, unquoted keys, and copy-ready normalized output.

How to use

  1. Paste JSON5 Input into the editor.
  2. Run the browser-side format workflow.
  3. Review the Formatted JSON5 and copy it when ready.

Benefits

  • Keeps json5 processing local to the browser for quick review.
  • Surfaces json5 issues or structure details before downstream reuse.
  • Keeps the processed result visible and copy-ready in the shared workspace.

JSON5 Input

{
  userId: 101,
  username: 'developer_hero',
  isActive: true,
  roles: ['admin', 'editor'],
  profile: {
    firstName: 'Jane',
    lastName: 'Doe',
    age: 28,
  },
  stats: {
    visits: 1540,
    lastSeen: '2023-10-25T14:30:00Z',
  },
}

Formatted JSON5

{
  userId: 101,
  username: 'developer_hero',
  isActive: true,
  roles: ['admin', 'editor'],
  profile: {
    firstName: 'Jane',
    lastName: 'Doe',
    age: 28,
  },
  stats: {
    visits: 1540,
    lastSeen: '2023-10-25T14:30:00Z',
  },
}

FAQ

Can I formatter JSON5 directly in browser?

Yes. The JSON5 route runs in browser so you can inspect the result without sending the document to a server.

Does this JSON5 route keep the result copy-ready?

Yes. The shared workspace keeps the processed result visible so you can review and copy it immediately after running the tool.

What to expect on this route

Use JSON5 Formatter when you need a cleanup step for lenient config syntax that preserves comments, trailing commas, and unquoted keys while making the file easier to review.

When to start here

  • Clean up JSON5 config pasted from toolchains, app settings, or local developer files before sharing it.
  • Use this route when the source relies on JSON5 conveniences such as comments or trailing commas.
  • Normalize spacing and indentation without forcing the file back into strict JSON.

What input works best

  • Paste JSON5 objects or arrays directly into the editor.
  • Comments, trailing commas, single-quoted strings, and unquoted keys stay supported here.
  • Broken delimiters or malformed literals still trigger validation feedback instead of formatted output.

What the result helps you confirm

  • Successful runs return readable indentation while preserving the lenient JSON5 syntax the file depends on.
  • Validation errors stay visible so you can fix malformed config before using it downstream.
  • The route focuses on cleanup first, which makes it a safe checkpoint before stricter validation or conversion work.

Useful next steps

  • Move to JSON5 Validator when you want a concise validity summary for the config.
  • Move to strict JSON tools only after confirming the file no longer depends on JSON5-only syntax.
  • Keep a representative config sample here before handing the structure to generators or schema routes.