JSON Formatter & Validator for instant, private data cleanup

Why use this tool

This JSON formatter is built for developers, QA workflows, API testing, and content cleanup when you need a fast private way to inspect or repair raw payloads.

• Clean up unreadable API responses and logs without sending data to a server.
• Catch broken JSON fast with inline error feedback before it reaches your app or endpoint.
• Switch between readable formatting and compact output for debugging, storage, or transport.
• Repair fixable JSON when pasted payloads have missing commas, quotes, or broken structure.

What it can do

• Format JSON with 2-space indentation.
• Format JSON with 4-space indentation.
• Minify JSON into a compact single-line payload.
• Validate JSON and show parser errors for broken input.
• Underline the invalid area in the editor after validation fails.
• Fix repairable broken JSON and output a cleaned version.
• Copy raw or formatted JSON to the clipboard.
• Run entirely client-side for private local processing.